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Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Apocynaceae||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Perennial herb, ascending or erect. Leaf: opposite. Inflorescence: generally cyme, >> 6-flowered. Flower: < 8 mm; corolla bell- or urn-shaped to cylindric, 5-lobed, with 5 triangular appendages alternate stamens; filaments free, attached at base of corolla tube, unappendaged, short, broad, anthers forming cone around and adherent to stigma, each partly sterile, sharply sagittate, pollen +- free; nectaries 5, free, around but not exceeding ovaries; ovaries free, not adherent, style +- 0, stigma massive, ovoid, obscurely 2-lobed. Fruit: slender, cylindric, pointed. Seed: with tuft of long hairs at 1 end.
Species In Genus: 7 species: North America. Etymology: (Greek: away from, dog, from ancient use as dog poison) Note: 2 geographically overlapped but ecologically different species in California, many hybrids between them, many of these named.
Unabridged Note: 2 geographically overlapped but ecologically different species in California, many hybrids between them. Of many names proposed for these, some (e.g., Apocynum androsaemifolium var. glabrum Macoun; Apocynum medium Greene var. floribundum (Greene) Woodson; Apocynum pumilum (Gray) Greene; Apocynum pumilum var. rhomboideum (Greene) Beg. & Bel.) applied to plants more like Apocynum androsaemifolium, others (e.g., Apocynum cannabinum var. glaberrimum A. DC.; Apocynum sibiricum Jacq. var. salignum (Greene) Fern.) to plants more like Apocynum cannabinum; none here accepted since extent of such subdivision +- limitless.
eFlora Treatment Author: Thomas J. Rosatti & Lauramay T. Dempster
Jepson Online Interchange
Key to ApocynumPrevious taxon: Amsonia tomentosa
Next taxon: Apocynum androsaemifolium
Citation for this treatment: Thomas J. Rosatti & Lauramay T. Dempster 2016. Apocynum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=10241, accessed on December 04, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on December 04, 2016.