John M MacDougal | Missouri Botanical Garden (original) (raw)
Papers by John M MacDougal
Passiflora microstipula was originally collected as seed in 1978 at the Los Tuxtlas biological st... more Passiflora microstipula was originally collected as seed in 1978 at the Los Tuxtlas biological station, Veracruz, Mexico. When plants grown from these seeds flowered in cultivation the next year, it was immediately clear that this species represented a completely new group within Passiflora. P. microstipula exhibits unusual characteristics such as tendril-borne flowers and conspicuously winged seeds. Observations of this species in cultivation revealed that significant morphological changes occur as development proceeds from a seedling to reproductively mature lianas. Morphology and ecology are discussed with regard to the species' likely taxonomic placement within the genus.
Passiflora microstipula was originally collected as seed in 1978 at the Los Tuxtlas biological st... more Passiflora microstipula was originally collected as seed in 1978 at the Los Tuxtlas biological station, Veracruz, Mexico. When plants grown from these seeds flowered in cultivation the next year, it was immediately clear that this species represented a completely new group within Passifiora. P. microstipula exhibits unusual characteristics such as tendril-borne flowers and conspicuously winged seeds. Observations of this species in cultivation revealed that significant morphological changes occur as development proceeds from a seedling to reproductively mature lianas. Morphology and ecology are discussed with regard to the species' likely taxonomic placement within the genus.
Systematic Botany, Mar 18, 2018
A new species of Passiflora (P. subg. Decaloba) from Colombia in the Andean region is described a... more A new species of Passiflora (P. subg. Decaloba) from Colombia in the Andean region is described and illustrated in this article, using and analysis of 81 morphological descriptors. Passiflora quimbayensis is named in honor to the Pre-Columbian Quimbaya civilization which once lived in the region where the species was discovered. Its closest relative is P. magdalenae, and can be distinguished from it by its peduncle (40-55 mm), sepal (12-15 mm), and androgynophore (5-6.5 mm) lengths, by the number of laminar ocellate-nectaries (6-9, mean 7.5), biseriate corona filaments, globose ovary, and by growing under different ecological conditions (1072 to 1249 m a. s. l.). It is a new endemic species to Colombia and must be regarded as endangered because of its limited occurrence.
Phytochemistry, Jun 1, 1997
Two new bioactive Annonaceous acetogenins, rollitacin (1) and rollinacin (2), along with one know... more Two new bioactive Annonaceous acetogenins, rollitacin (1) and rollinacin (2), along with one known acetogenin, javoricin, were isolated from the ethanolic extract of the leaves of Rollinia mucosa. Compounds 1 and 2 exhibited selective inhibitory effects among six human solid tumour cell lines. The structural elucidations of 1 and 2 were achieved by various spectroscopic analyses and chemical derivatizations.
The new species Passiflora tarminiana differs from its closes relative by the character combinati... more The new species Passiflora tarminiana differs from its closes relative by the character combination of very small acicular stipules and large almost reflexed petals and sepals. This species has escaped detection despite being widely cultivated. Naturalized populations, particularly on Hawa'ii, have created problems for conservation of the native flora. In Colombia it is more frequently adopted in industrial cultivation because of its rusticity and resistance to fungal diseases.
Molecular Phylogenetics and Evolution, Nov 1, 2021
Because of their extraordinary flower and leaf morphology, passion flowers (Passifloraceae) have ... more Because of their extraordinary flower and leaf morphology, passion flowers (Passifloraceae) have fascinated naturalists since their discovery. Within the large, diverse (600 species) genus Passiflora is an especially enigmatic and species-rich (120 spp.) subclade, Section Decaloba, which occurs in the Neotropics and has its center of diversity in Andean montane forests. A recent phylogenetic study of Passifloraceae showed that Section Decaloba was monophyletic, but was unable to resolve relationships within the clade, thus preventing inferences of evolutionary history and biogeography. The goal of this study was to elucidate the phylogeny and biogeography of Section Decaloba. We sampled 206 accessions representing 91 of the ∼120 known species in section Decaloba and four outgroups, with samples derived predominantly from herbarium specimens. We generated DNA sequences using a high-throughput DNA sequencing technique called 2b-RAD, reconstructed the phylogeny, and conducted ancestral area reconstructions to infer the biogeographic history of the group. We recovered predominantly well-supported trees in which species were grouped into two main clades: 1) the Central American clade, within which the majority of nodes well supported and species were monophyletic and 2) the South American clade, a large clade that showed overall lower resolution and included several polyphyletic species and species complexes that need additional research. RASP analysis showed that section Decaloba originated in Central America around 10.4 Ma, and then dispersed to South America, the Greater Antilles, and the Bahamas. The South American clade diversified in the Northern Andes and then dispersed to the rest of South America, and Lesser Antilles. Results suggest that both long-distance dispersal and colonization of newly available habitats (i.e., in the Andes) likely promoted diversification of this clade. This study also illustrates how using herbarium specimens and a RAD-seq approach can produce phylogenies for broadly distributed, highly diverse, and poorly accessible groups of plants where field collections would be unfeasible.
Novon, Oct 17, 2022
Passiflora ornithoura Mast. var. chiapasensis J. M. MacDougal from northern Mesoamerica is recogn... more Passiflora ornithoura Mast. var. chiapasensis J. M. MacDougal from northern Mesoamerica is recognized as a distinct species in section Decaloba DC. and elevated to specific rank as P. ilamo J. M. MacDougal & MacVean. An updated description of the species is given, illustrated by photographs from the field and accompanied by a geographic range map and citation of specimens.
Phytotaxa, Dec 14, 2016
Names within Passiflora section Dysosmia (Passifloraceae) were evaluated for proper typification ... more Names within Passiflora section Dysosmia (Passifloraceae) were evaluated for proper typification and nomenclatural clarity. Because several names lacked type material, 13 lectotypes, two neotypes, and four epitypes are here designated to maintain nomenclatural stability. Many more names suffered from other nomenclatural discrepancies and thus four orthographic errors, six author citations, and 12 type designations are here corrected to comply with the International Code of Nomenclature (ICN). Seven names in Dysosmia are treated as ambiguous and 12 names are identified as either invalid or illegitimate.
Novon, 1992
Four new species are described, one with two distinct subspecies: Passijiora (sect. Circa) jitlia... more Four new species are described, one with two distinct subspecies: Passijiora (sect. Circa) jitliana, P. (sect. Circa) xiikzodz subsp. xiikzodz and subsp. itzrnsis , P. (sect. Pscudodysosmia) oaxaccnsis , and P. (sect. Xerogona) escobariana. Pas¬ siflora Juliana appears to be the closest relative of P. viridflora Cavanilles, a species that traditionally has been segregated as a distinct section or subgenus.
Lundellia, Dec 1, 2000
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
Phytotaxa, Mar 13, 2018
A new species of passion flower from the Cordillera Central of the Colombian Andes is here descri... more A new species of passion flower from the Cordillera Central of the Colombian Andes is here described; Passiflora kumandayi M.A. Buitrago A. & Coca (subgenus Decaloba, supersection Auriculata). This species, along with five other closely related Andean species, comprise a monophyletic group characterized by paired branched inflorescences and small flowers with short or absent androgynophores. A provisional key to the species in the newly described section Apodae is presented. Passiflora kumandayi is here illustrated and its affinities with related species are discussed based on morphology and phylogenetic binning analysis using molecular site weight calibration.
Novon, 2003
The new section Pterosperma in Pas¬ siflora subg. Decaloba (Passifloraceae) is described from sou... more The new section Pterosperma in Pas¬ siflora subg. Decaloba (Passifloraceae) is described from southern Mexico and Central America on the basis of leaf, inflorescence, seed, and fruit mor¬ phology. Species in this section are the sole hosts of the specialized herbivore Eueides lineata (Heliconidae). A morphological key to its four species is given, and two species, Passiflora lancetillensis and P. pedicellaris, are newly described and illustrated.
Novon, 2001
Two new species of passionflower vine (. Passiflora , Passifloraceae) from southwestern and south... more Two new species of passionflower vine (. Passiflora , Passifloraceae) from southwestern and southern Mexico are described and illustrated. Pas¬ siflora mcvaughiana and P. manantlanensis, both in subgenus Decaloba (DC.) Reichenbach, belong to sections Cieca (Medikus) DC. and Decaloba, re¬ spectively. This brings the number of named native species of Passiflora recognized in Mexico to 68, with 21 native to the southwestern area known as Nueva Galicia.
Annals of the Missouri Botanical Garden, Aug 1, 2018
In subgenus Decaloba (DC.) Rchb. of Passiflora L., the section Xerogona (Raf.) Killip (Passiflora... more In subgenus Decaloba (DC.) Rchb. of Passiflora L., the section Xerogona (Raf.) Killip (Passifloraceae) is a group of herbaceous vines found in subtropical and tropical regions of the Americas. Primarily distributed in Central America, with a few also found in the West Indies and South America, the species of Passiflora sect. Xerogona are recognized by their unusual dehiscent capsular fruit, the absence of bracts and laminar nectaries, and their transversely grooved seeds. Passiflora tenella Killip is the only species included in Passiflora sect. Xerogona with a fruit that does not appear to be a capsule, but the shape of the leaves and the absence of floral bracts and laminar nectaries suggest affiliation with this section. Fifteen species, including two subspecies, are recognized within Passiflora sect. Xerogona. Passiflora cobanensis Killip is distinguished as two subspecies, P. cobanensis subsp. cobanensis and P. cobanensis subsp. brevipes (Killip) T. Boza, with the latter subspecies transferred from P. brevipes Killip. From previous species circumscriptions, this section contains two problematic species complexes for P. capsularis L. and P. rubra L. The morphological variation between and within these two species complexes was examined in this study, using Principal Component Analysis and correlation matrices of morphological characters, and this variation was studied throughout their distributional ranges. Passiflora capsularis is recognized as a single variable species. Two species are recognized within the P. rubra complex, based primarily on floral characters, as P. cisnana Harms and P. rubra. Passiflora cisnana is lectotypified.
Journal of Organic Chemistry, Nov 15, 1996
Passiflora microstipula was originally collected as seed in 1978 at the Los Tuxtlas biological st... more Passiflora microstipula was originally collected as seed in 1978 at the Los Tuxtlas biological station, Veracruz, Mexico. When plants grown from these seeds flowered in cultivation the next year, it was immediately clear that this species represented a completely new group within Passiflora. P. microstipula exhibits unusual characteristics such as tendril-borne flowers and conspicuously winged seeds. Observations of this species in cultivation revealed that significant morphological changes occur as development proceeds from a seedling to reproductively mature lianas. Morphology and ecology are discussed with regard to the species' likely taxonomic placement within the genus.
Passiflora microstipula was originally collected as seed in 1978 at the Los Tuxtlas biological st... more Passiflora microstipula was originally collected as seed in 1978 at the Los Tuxtlas biological station, Veracruz, Mexico. When plants grown from these seeds flowered in cultivation the next year, it was immediately clear that this species represented a completely new group within Passifiora. P. microstipula exhibits unusual characteristics such as tendril-borne flowers and conspicuously winged seeds. Observations of this species in cultivation revealed that significant morphological changes occur as development proceeds from a seedling to reproductively mature lianas. Morphology and ecology are discussed with regard to the species' likely taxonomic placement within the genus.
Systematic Botany, Mar 18, 2018
A new species of Passiflora (P. subg. Decaloba) from Colombia in the Andean region is described a... more A new species of Passiflora (P. subg. Decaloba) from Colombia in the Andean region is described and illustrated in this article, using and analysis of 81 morphological descriptors. Passiflora quimbayensis is named in honor to the Pre-Columbian Quimbaya civilization which once lived in the region where the species was discovered. Its closest relative is P. magdalenae, and can be distinguished from it by its peduncle (40-55 mm), sepal (12-15 mm), and androgynophore (5-6.5 mm) lengths, by the number of laminar ocellate-nectaries (6-9, mean 7.5), biseriate corona filaments, globose ovary, and by growing under different ecological conditions (1072 to 1249 m a. s. l.). It is a new endemic species to Colombia and must be regarded as endangered because of its limited occurrence.
Phytochemistry, Jun 1, 1997
Two new bioactive Annonaceous acetogenins, rollitacin (1) and rollinacin (2), along with one know... more Two new bioactive Annonaceous acetogenins, rollitacin (1) and rollinacin (2), along with one known acetogenin, javoricin, were isolated from the ethanolic extract of the leaves of Rollinia mucosa. Compounds 1 and 2 exhibited selective inhibitory effects among six human solid tumour cell lines. The structural elucidations of 1 and 2 were achieved by various spectroscopic analyses and chemical derivatizations.
The new species Passiflora tarminiana differs from its closes relative by the character combinati... more The new species Passiflora tarminiana differs from its closes relative by the character combination of very small acicular stipules and large almost reflexed petals and sepals. This species has escaped detection despite being widely cultivated. Naturalized populations, particularly on Hawa'ii, have created problems for conservation of the native flora. In Colombia it is more frequently adopted in industrial cultivation because of its rusticity and resistance to fungal diseases.
Molecular Phylogenetics and Evolution, Nov 1, 2021
Because of their extraordinary flower and leaf morphology, passion flowers (Passifloraceae) have ... more Because of their extraordinary flower and leaf morphology, passion flowers (Passifloraceae) have fascinated naturalists since their discovery. Within the large, diverse (600 species) genus Passiflora is an especially enigmatic and species-rich (120 spp.) subclade, Section Decaloba, which occurs in the Neotropics and has its center of diversity in Andean montane forests. A recent phylogenetic study of Passifloraceae showed that Section Decaloba was monophyletic, but was unable to resolve relationships within the clade, thus preventing inferences of evolutionary history and biogeography. The goal of this study was to elucidate the phylogeny and biogeography of Section Decaloba. We sampled 206 accessions representing 91 of the ∼120 known species in section Decaloba and four outgroups, with samples derived predominantly from herbarium specimens. We generated DNA sequences using a high-throughput DNA sequencing technique called 2b-RAD, reconstructed the phylogeny, and conducted ancestral area reconstructions to infer the biogeographic history of the group. We recovered predominantly well-supported trees in which species were grouped into two main clades: 1) the Central American clade, within which the majority of nodes well supported and species were monophyletic and 2) the South American clade, a large clade that showed overall lower resolution and included several polyphyletic species and species complexes that need additional research. RASP analysis showed that section Decaloba originated in Central America around 10.4 Ma, and then dispersed to South America, the Greater Antilles, and the Bahamas. The South American clade diversified in the Northern Andes and then dispersed to the rest of South America, and Lesser Antilles. Results suggest that both long-distance dispersal and colonization of newly available habitats (i.e., in the Andes) likely promoted diversification of this clade. This study also illustrates how using herbarium specimens and a RAD-seq approach can produce phylogenies for broadly distributed, highly diverse, and poorly accessible groups of plants where field collections would be unfeasible.
Novon, Oct 17, 2022
Passiflora ornithoura Mast. var. chiapasensis J. M. MacDougal from northern Mesoamerica is recogn... more Passiflora ornithoura Mast. var. chiapasensis J. M. MacDougal from northern Mesoamerica is recognized as a distinct species in section Decaloba DC. and elevated to specific rank as P. ilamo J. M. MacDougal & MacVean. An updated description of the species is given, illustrated by photographs from the field and accompanied by a geographic range map and citation of specimens.
Phytotaxa, Dec 14, 2016
Names within Passiflora section Dysosmia (Passifloraceae) were evaluated for proper typification ... more Names within Passiflora section Dysosmia (Passifloraceae) were evaluated for proper typification and nomenclatural clarity. Because several names lacked type material, 13 lectotypes, two neotypes, and four epitypes are here designated to maintain nomenclatural stability. Many more names suffered from other nomenclatural discrepancies and thus four orthographic errors, six author citations, and 12 type designations are here corrected to comply with the International Code of Nomenclature (ICN). Seven names in Dysosmia are treated as ambiguous and 12 names are identified as either invalid or illegitimate.
Novon, 1992
Four new species are described, one with two distinct subspecies: Passijiora (sect. Circa) jitlia... more Four new species are described, one with two distinct subspecies: Passijiora (sect. Circa) jitliana, P. (sect. Circa) xiikzodz subsp. xiikzodz and subsp. itzrnsis , P. (sect. Pscudodysosmia) oaxaccnsis , and P. (sect. Xerogona) escobariana. Pas¬ siflora Juliana appears to be the closest relative of P. viridflora Cavanilles, a species that traditionally has been segregated as a distinct section or subgenus.
Lundellia, Dec 1, 2000
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
Phytotaxa, Mar 13, 2018
A new species of passion flower from the Cordillera Central of the Colombian Andes is here descri... more A new species of passion flower from the Cordillera Central of the Colombian Andes is here described; Passiflora kumandayi M.A. Buitrago A. & Coca (subgenus Decaloba, supersection Auriculata). This species, along with five other closely related Andean species, comprise a monophyletic group characterized by paired branched inflorescences and small flowers with short or absent androgynophores. A provisional key to the species in the newly described section Apodae is presented. Passiflora kumandayi is here illustrated and its affinities with related species are discussed based on morphology and phylogenetic binning analysis using molecular site weight calibration.
Novon, 2003
The new section Pterosperma in Pas¬ siflora subg. Decaloba (Passifloraceae) is described from sou... more The new section Pterosperma in Pas¬ siflora subg. Decaloba (Passifloraceae) is described from southern Mexico and Central America on the basis of leaf, inflorescence, seed, and fruit mor¬ phology. Species in this section are the sole hosts of the specialized herbivore Eueides lineata (Heliconidae). A morphological key to its four species is given, and two species, Passiflora lancetillensis and P. pedicellaris, are newly described and illustrated.
Novon, 2001
Two new species of passionflower vine (. Passiflora , Passifloraceae) from southwestern and south... more Two new species of passionflower vine (. Passiflora , Passifloraceae) from southwestern and southern Mexico are described and illustrated. Pas¬ siflora mcvaughiana and P. manantlanensis, both in subgenus Decaloba (DC.) Reichenbach, belong to sections Cieca (Medikus) DC. and Decaloba, re¬ spectively. This brings the number of named native species of Passiflora recognized in Mexico to 68, with 21 native to the southwestern area known as Nueva Galicia.
Annals of the Missouri Botanical Garden, Aug 1, 2018
In subgenus Decaloba (DC.) Rchb. of Passiflora L., the section Xerogona (Raf.) Killip (Passiflora... more In subgenus Decaloba (DC.) Rchb. of Passiflora L., the section Xerogona (Raf.) Killip (Passifloraceae) is a group of herbaceous vines found in subtropical and tropical regions of the Americas. Primarily distributed in Central America, with a few also found in the West Indies and South America, the species of Passiflora sect. Xerogona are recognized by their unusual dehiscent capsular fruit, the absence of bracts and laminar nectaries, and their transversely grooved seeds. Passiflora tenella Killip is the only species included in Passiflora sect. Xerogona with a fruit that does not appear to be a capsule, but the shape of the leaves and the absence of floral bracts and laminar nectaries suggest affiliation with this section. Fifteen species, including two subspecies, are recognized within Passiflora sect. Xerogona. Passiflora cobanensis Killip is distinguished as two subspecies, P. cobanensis subsp. cobanensis and P. cobanensis subsp. brevipes (Killip) T. Boza, with the latter subspecies transferred from P. brevipes Killip. From previous species circumscriptions, this section contains two problematic species complexes for P. capsularis L. and P. rubra L. The morphological variation between and within these two species complexes was examined in this study, using Principal Component Analysis and correlation matrices of morphological characters, and this variation was studied throughout their distributional ranges. Passiflora capsularis is recognized as a single variable species. Two species are recognized within the P. rubra complex, based primarily on floral characters, as P. cisnana Harms and P. rubra. Passiflora cisnana is lectotypified.
Journal of Organic Chemistry, Nov 15, 1996
2004. Ulmer, T. & MacDougal, J. (eds.). With drawings by Bettina Ulmer. 430 pages, 343 color phot... more 2004. Ulmer, T. & MacDougal, J. (eds.). With drawings by Bettina Ulmer. 430 pages, 343 color photos, 258 line drawings. Portland, Cambridge: Timber Press.