Key to Wyethia

View taxon page for Wyethia

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

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

1. Heads discoid (or ray flowers rarely 1–3) ..... W. invenusta

1' Heads radiate, ray flowers 5–21+

2. Basal leaves 0 on flowering stems (or generally < cauline leaves)

3. Outer phyllaries many, generally not leaf-like, generally < 6 mm wide; 

involucre 

Group of bracts more or less held together as a unit, subtending a flower, fruit (acorn cup), or inflorescence.

 hemispheric; plant generally > 5 dm

4. Plant densely soft-hairy; fruit 8–12 mm, glabrous or distally short-hairy; pappus (0.5)1–3 mm ..... W. elata

4' Plant scabrous and sparsely bristly; fruit 5–6 mm, glabrous; pappus 0 or minute ..... W. reticulata

3' Outer phyllaries 4–6, ± leaf-like, generally 6–17 mm wide; involucre bell-shaped; plant generally 1–3(5) dm

5. Head 1; leaves glabrous; pappus 0 or a crown 0.1–0.3 mm ..... W. bolanderi

5' Heads generally several; young leaves 

tomentose 

Covered with densely interwoven, generally matted hairs.

; pappus a crown of triangular scales 1–1.5 mm ..... W. ovata

2' Basal leaves present on flowering stems, generally > cauline leaves

6. Outer phyllaries wide, leaf-like, generally >> inner; 

head 

1. A dense, often spheric inflorescence of sessile or subsessile flowers.
2. In Asteraceae and some other groups, a head-like inflorescence is one in which sessile or subsessile inflorescence units (e.g., heads in Asteraceae, umbels enclosed by involucres in Eriogonum), instead of individual flowers, are attached in a short dense cluster without an evident axis or branches.

generally 1(2), large

7. Plant shiny green, glabrous or sparsely short-hairy, glandular; phyllaries glabrous or glandular; fruit 10–13 mm ..... W. glabra

7' Plant densely tomentose, often becoming ± glabrous; phyllaries persistently tomentose; fruit 12–15 mm ..... W. helenioides

6' Outer phyllaries narrow, generally not or barely leaf-like, generally barely or not > inner; heads 1–few

8. Plant ± tomentose, often becoming glabrous; phyllaries generally few ..... W. mollis

8' Plant glabrous to short-hairy; phyllaries generally many

9. Phyllaries ± soft-hairy, 

ciliate 

Having generally straight, conspicuous hairs along margins or edges.

; head generally 1 ..... W. angustifolia

9' Phyllaries glabrous or 

puberulent 

Minutely hairy.

, margins occasionally ± puberulent, not ciliate; heads 1–4 ..... W. longicaulis

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