Asclepias jorgeana (Asclepiadaceae), a New Milkweed from Montane Western Mexico

A new milkweed, Asclepias jorgeana, from pine-oak forests of Chihuahua, Sonora, Durango, and Guanajuato, Mexico, is described and illustrated. It appears to be related to A. pringlei (Greenman) Woodson, which occurs mostly to the south and east of A. jorgeana; however, they occur sympatrically in Du...

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Bibliographic Details
Published in:Novon (Saint Louis, Mo.) Mo.), 1999, Vol.9 (2), p.179-184
Main Authors: Fishbein, Mark, Lynch, Steven P.
Format: Article
Language:English
Subjects:
Anthers
Cloud forests
Coniferous forests
Flowers
Forest ecology
Hybridity
Inflorescences
New species
Plants
Riparian forests
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Description
Summary:A new milkweed, Asclepias jorgeana, from pine-oak forests of Chihuahua, Sonora, Durango, and Guanajuato, Mexico, is described and illustrated. It appears to be related to A. pringlei (Greenman) Woodson, which occurs mostly to the south and east of A. jorgeana; however, they occur sympatrically in Durango. The new species is distinguished from A. pringlei by attenuate corona hoods, erect, fusiform follicles, and comose seeds. Although the new species has been collected several times since 1946, specimens have remained unidentified or have been determined to be hybrids or an undescribed species.
ISSN:1055-3177
DOI:10.2307/3391794