Jepson eFlora
Key to families | Table of families and genera

Key to Collomia

View taxon page for Collomia

1. Perennial herb from underground rhizomes

2. Plant generally cespitose; stem < 5 cm, internodes congested; leaf blade < 2 cm, lobed; corolla light to deep purple ..... C. larsenii

2' Plant erect; stem > 10 cm, internodes spaced; leaf blade generally 3–8 cm, coarsely toothed; corolla red-orange ..... C. rawsoniana

1' Annual from taproot

3. Stem generally erect, simple, middle internodes short-white-nonglandular-hairy; flowers in heads terminal, occasionally on axillary stems

4. Corolla yellow to orange, fading white, 15–30 mm (< 5 mm in cleistogamous flowers); at least 1 anther exserted; pollen generally blue ..... C. grandiflora

4' Corolla white to pink, <= 15 mm; anthers included; pollen generally white ..... C. linearis

3' Stem generally spreading, branches spreading to ascending, internodes long-translucent-glandular-hairy; flowers 1 or in clusters axillary and terminal

5. Lower cauline leaves elliptic, 3-toothed or 1–2 pinnate-lobed

6. Lower cauline leaves 3-toothed, upper entire; corolla tube purple, throat yellow, lobes violet-pink ..... C. diversifolia

6' Lower cauline leaves 1–2 pinnate-lobed, upper lobed to entire; corolla tube yellow to light pink, throat yellow to white, lobes light pink to white ..... C. heterophylla

5' Lower cauline leaves linear to lanceolate, entire

7. Flowers 1(2–3), corolla 4–6 mm; pollen white ..... C. tenella

7' Flowers 2–3(5), corolla 8–22 mm; pollen generally blue

8. Corolla 8–14 mm, stamens attached at 1 level ..... C. tinctoria

8' Corolla 12–22 mm, stamens attached at > 1 level ..... C. tracyi

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