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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.



Luc Brouillet

Perennial herb, unarmed. Leaf: odd-1-pinnate; stipules scarious or leaflet-like, fragile or not, early-deciduous; leaflets 3–15, often ± opposite. Inflorescence: several-flowered umbel or 1–2-flowered, axillary, generally peduncled, often bracted. Flower: corolla yellow, white, or pink, fading darker; 9 filaments fused, 1 free. Fruit: dehiscent, exserted from calyx, linear to oblong, ± beaked. Seed: few–several.
± 11 species: southwestern Canada, western United States, Mexico to Guatemala, especially California. (D. Hosack, New York physician, botanist, mineralogist, 1769–1835) [Brouillet 2008 J Bot Res Inst Texas 2:387–394] Pollen apertures 3. Intermediates may be hybrids.
Unabridged references: [Isely 1981 Mem New York Bot Gard 25:128–206]

Key to Hosackia

1. Leaflets 3–5; corolla 8–10 mm; plant decumbent; North Coast Ranges ..... H. yollabolliensis

1' Leaflets (3)5–15; corolla generally 8–16 mm; plant generally ascending or erect; if leaflets < 5, not of North Coast Ranges

2. Leaf silky or canescent, gray or silvery; fruit glabrous ..... H. incana

2' Leaf glabrous or hairy, rarely gray or silvery; fruit generally hairy if leaf hairy

3. Peduncle bract 0 or just below umbel, generally simple or 2–3-parted; fruit 1.5–3 mm wide

4. Petal claw included to ± exserted from calyx tube; plant often hairy ..... H. oblongifolia

5. Leaflets 3–7, glabrous; corolla 8–9 mm; n Sierra Nevada Foothills (Calaveras Co.), s High Sierra Nevada (Tulare Co.), East of Sierra Nevada ..... var. cuprea

5' Leaflets 7–11, hairy or glabrous; corolla 9–13 mm; California Floristic Province, Modoc Plateau, Mojave Desert ..... var. oblongifolia

4' Petal claw exserted from calyx tube; plant ± glabrous

6. Corolla wings pink-purple, fading white; bracts generally 3-parted ..... H. gracilis

6' Corolla wings white; bracts 0 or generally simple ..... H. pinnata

3' Peduncle bract generally well below umbel, generally 3–5-parted, sometimes fragile, deciduous; fruit 3–5 mm wide

7. Hairs spreading, glandular or not; stipules often wide, leaflet-like, persistent, in age scarious or not; corolla pink to red-purple ..... H. stipularis

8. Stem wiry; stipules wide, clasping stem ..... var. ottleyi

8' Stem often fleshy; stipules narrow or wide, not or ± clasping stem ..... var. stipularis

7' Hairs generally ± 0 or appressed, rarely glandular; stipules scarious, fragile, not leaflet-like, generally some deciduous; corolla initially white, pink, or yellow-green

9. Flowers generally 6–10; corolla 10–12 mm, white or ± pink, in age striate, darker; pedicel 2–3 mm, ± longer in fruit; leaflet length 2–3 × width — North Coast, Outer North Coast Ranges, n High Sierra Nevada ..... H. rosea

9' Flowers generally 12–20; corolla 12–17 mm, yellow-green, dark-blotched in age; pedicel generally 3–6 mm, > 3 mm at least in fruit; leaflet length generally 1–2.5 × width ..... H. crassifolia

10. Plant glabrous or strigose; widespread except s Peninsular Ranges ..... var. crassifolia

10' Plant soft-hairy; s Peninsular Ranges (Otay Mtn, San Diego Co.) ..... var. otayensis


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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