Jepson eFlora: Key page
Vascular Plants of California
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Key to Apocynaceae

View taxon page for Apocynaceae


Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Filaments fused into filament , generally with 5 free or fused, ± elaborate appendages abaxially; anthers fused into anther  around and fused to pistil head; pollen removed in pairs of pollinianectaries in stigmatic chambers (genera formerly treated as Asclepiadaceae)

2. Filament column ± without appendages ..... Funastrum utahense

2' Filament column with appendages

3. Filament column appendages fused into 5-lobed, cup- or plate-like structure around anther head ..... MATELEA

3' Filament column appendages free

4. Filament column appendages hollow (possibly due to complete fusion of margins); ring of tissue at base of corolla present ..... FUNASTRUM

4' Filament column appendages solid (margins converging, nearly meeting or not, not fused); ring of tissue at base of corolla 0

5. Filament column appendage margins converging but not nearly meeting abaxially; flowers in raceme- or panicle-like stem twining ..... ARAUJIA

5' Filament column appendage margins converging and meeting or nearly meeting adaxially (to form hood); flowers in umbel-like cymes; stem  to  ..... ASCLEPIAS

1' Filaments free, unappendaged; anthers free, lying against, adherent to pistil head or not; pollen ± free, not removed in pollinia; nectaries 0 or near ovaries (genera formerly treated as Apocynaceae)

6. Seed glabrousstamens attached near top of corolla tube, near level of stigma

7. Leaves  to subwhorled; plant erect ..... AMSONIA

7' Leaves  to subopposite; plant erect or sprawling

8. Corolla pink, tube ± ; plant erect ..... [Catharanthus roseus]

8' Corolla purple-blue (white), tube ; plant sprawling ..... VINCA

6' Seed with tuft of long hairs at 1 end; stamens attached at or near base of corolla tube, below level of stigma, or appearing so

9. Plant shrub, small treeleaves generally  or subwhorled (opposite); nectaries 0; sap not milky ..... NERIUM

9' Plant  herb; leaves opposite; nectaries 5, free or fused; sap milky

10. Leaves, stemsroots not fleshy; flower < 8 mm, in generally >> 6-flowered ; nectaries 5, free ..... APOCYNUM

10' Leaves, stems, roots fleshy; flower > 15 mm, in 2–6-flowered cyme; nectaries 5, fused into a 5-lobed disk ..... CYCLADENIA



Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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