Key to Crocanthemum

View taxon page for Crocanthemum

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

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

1. Glandular hairs dense on inflorescence branches, 

pedicels 

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

; outer sepals 

lanceolate 

Narrowly elongate, widest in the basal half, often tapered to an acute tip.

; calyx hairs 1–1.7 mm, 

simple 

Composed of a single part; undivided; unbranched.

, 

strigose 

With stiff, straight, sharp, appressed hairs.

(sometimes also with short 

stellate 

Pertaining to a hair or other structure with three or more branches radiating in two or three dimensions from a common point.

hairs) ..... C. greenei

1' Glandular hairs 0 to sparse on inflorescence branches, pedicels; outer sepals 

linear 

Elongate, with nearly parallel sides; narrower than elliptic or oblong.

; calyx hairs <= 1 mm, stellate

2. Petals 4–8 mm; inner sepals 3.5–5(7.5 sporadically along coast and on Santa Cruz Island) mm; fruit 3–4 mm; stems 10–45 cm, 

spreading 

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

to 

erect 

Upright; vertically oriented.

, together cup-like or not; deciduous in mid summer ..... C. scoparium

3. Plants generally 10–30 cm; stems proximally spreading and distally 

ascending 

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

or proximally ascending and distally erect; outer sepals 1.5–2.5 mm; NCo, NCoRO, CCo, SnFrB, SCo (rare), n ChI (Santa Cruz Island) ..... C. scoparium var. scoparium

3' Plants generally 30–45 cm; stems proximally ascending and distally erect or generally erect throughout; outer sepals 2–3.5 mm; NCoRO, NCoRI, n SNF, SnJV, SnFrB, SCoRI, SCo, WTR, SnGb, PR ..... C. scoparium var. vulgare

2' Petals 8–12 mm; inner sepals 4.7–7(8) mm; fruit 3.5–4.3 mm; stems 30–80 cm, erect, together not cup-like; deciduous late summer, fall

4. Stems ± glabrous to sparsely stellate-hairy, leaves and inflorescences stellate-felt-like; inflorescences wide; SCo, PR ..... C. aldersonii

4' Stems, leaves, inflorescences densely stellate-felt-like (occasionally stems moderately stellate-hairy); inflorescences narrow; n SNF ..... C. suffrutescens

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