Key to Dieteria

View taxon page for Dieteria

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

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

1. Ray flowers 0 ..... D. canescens var. shastensis (2)

1' Ray flowers present

2. Phyllary tips 

acute 

Having a short-tapered, sharp tip, the sides convex or straight and converging at less than a right angle.

to long-acuminate, 1–6 mm; phyllaries generally hairy and/or glandular throughout ..... D. asteroides

3. Involucre hemispheric; phyllary tips long-acuminate, 3–6 mm; leaves of mid-stem 

serrate 

Having margins with sharp, fine to coarse teeth generally pointing tipward, not outward; margins with such teeth on such primary teeth are doubly serrate.

or minutely serrate ..... var. asteroides

3' Involucre widely obconic to ± hemispheric; phyllary tips acute to short-acuminate, 1–3 mm; leaves of mid-stem 

entire 

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

or nearly so ..... var. lagunensis

2' Phyllary tips acute to short-acuminate, 1–3 mm; phyllaries generally hairy and/or glandular only on green tips ..... D. canescens

4. Heads generally 14–20 mm; subshrub or long-lived 

perennial 

Completing life cycle (germination through death) in more than two years or growing seasons, generally non-woody (at least above ground) to woody; includes perennial herbs as well as subshrubs to trees; the abbreviation 'per' only refers to perennial herb, not to the word 'perennial' alone.

 herb; e PR (Santa Rosa Mtns) ..... var. ziegleri

4' Heads generally 6–12 mm; annual to short-lived perennial herb; widespread

5. Stems with stalked glands, occasionally also canescent-puberulent ..... var. leucanthemifolia

5' Stems canescent-puberulent, stalked glands sparse or lacking

6. Stems stiffly 

erect 

Upright; vertically oriented.

, <= 60 cm; branches many, stiff, 

spreading 

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

; heads many ..... var. incana

6' Stems various, generally smaller; branches generally fewer, more flexible, loosely spreading to 

ascending 

Curving or angling upward from base, or about 30-60 degrees less than vertical or away from axis of attachment.

; heads few to many

7. Ray flowers with styles, fertile, well developed; 

involucre 

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

generally 8–12 mm; phyllaries generally in 5–10 series ..... var. canescens

7' Ray flowers without styles, sterile, often ± reduced; involucre 6–9 mm; phyllaries generally in 3–5 series ..... var. shastensis (2)

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