Key to Oreonana
View taxon page for Oreonana
(For a list of species in Oreonana, use the above link.)
Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.
1. Herbage white-tomentose;
umbels hemispheric;
corolla yellow or maroon;
anthers yellow;
calyx lobes 
1. A major expansion or bulge, such as on the margin of a leaf, sepal, or petal, or on the surface of an ovary. 2. The free tips of otherwise fused structures, such as sepals or petals; larger than teeth.
inconspicuous, obscured by
hairs ..... O. vestita 1' Herbage gray-hairy; umbels
spheric; corolla white; anthers purple; calyx lobes conspicuous,
spreading 
Oriented more or less perpendicularly to the axis of attachment; often, more or less horizontal.
2. Flowers appearing ± with
leaf 
Organ arising from a stem, generally composed of a stalk (petiole) and a flat, expanded, green, photosynthetic area (blade); distinguished from a leaflet by the presence in its axil of a bud, branch, thorn, or flower; sometimes with lateral, basal appendages (stipules); either simple (toothed, lobed, or dissected but not divided into leaflets) or compound (divided into leaflets).
blades; bladeless
sheaths 0.5–2 cm; umbels 1–3 cm diam;
rays 5–15, 2–8 mm; calyx lobes yellow
..... O. clementis 2' Flowers appearing before leaf blades; bladeless sheaths 3–6 cm; umbels 2.4–4.5 cm diam; rays 20–35, 5–15 mm; calyx lobes purple
..... O. purpurascens
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