Key to Rudbeckia

View taxon page for Rudbeckia

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

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

1. Heads discoid ..... R. occidentalis

1' Heads radiate

2. Stem hairy; pappus 0; disk corollas dark brown-purple; receptacle ± spheric or ovoid ..... R. hirta var. pulcherrima

2' Stem glabrous or nearly so; pappus a crown of fused or ± separate scales; disk corollas green-yellow; receptacle ovoid or conic to columnar

3. Leaves green; abaxial 

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).

face hairy ..... R. californica

3' Leaves blue-green, glaucous, abaxial leaf face glabrous

4. Leaf margins 

entire 

Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.).

or with a few shallow teeth ..... R. glaucescens

4' Leaf margins generally coarsely toothed or lobed ..... R. klamathensis

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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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