Key to Osmorhiza

View taxon page for Osmorhiza

(For a list of species in Osmorhiza, use the above link.)

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

1. Fruit not long-tapered at base, glabrous; 

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).

2-pinnate ..... O. occidentalis

1' Fruit long-tapered into tail at base, bristly; leaf 2–3-ternate

2. Involucel conspicuous; corolla ± green-yellow ..... O. brachypoda

2' Involucel 0 or vestigial; corolla white or purple (± green-white)

3. Fruit club-like, beakless; rays, 

pedicels 

Stalk of an individual flower in an inflorescence, or the corresponding structure in fruit.

 

spreading 

Oriented more or less perpendicularly to the axis of attachment; often, more or less horizontal.

..... O. depauperata

3' Fruit linear-fusiform or -oblong, beaked; rays, pedicels spreading-ascending

4. Ovary tip projection conic; disk 0; fruit 12–25 mm; corolla white ..... O. berteroi

4' Ovary tip projection depressed-conic; disk conspicuous; fruit 8–15 mm; corolla purple (± green-white) ..... O. purpurea

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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/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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