Jepson eFlora
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Key to Heterotheca

View taxon page for Heterotheca

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

1. Ray flowers 0; outer disk pappus scales few — generally dry streambeds ..... H. oregona

2. Leaves of branches sparsely hairy or scabrous, ± densely glandular

3. Leaves of branches generally > 13 mm, > 3 mm wide, sparsely hairy; outer phyllaries lance-deltate; Northwestern California, Central Western California ..... var. oregona

3' Leaves of branches generally < 13 mm, < 3 mm wide, ± scabrous; outer phyllaries ovate-deltate; San Joaquin Valley, Central Western California ..... var. scaberrima

2' Leaves of branches ± densely hairy, sparsely glandular

4. Stem generally branched proximal to middle; leaves long-soft-hairy and ± densely bristly, appearing gray-green; Northwestern California, Cascade Range, n&c Sierra Nevada Foothills, n High Sierra Nevada, San Joaquin Valley, Central Western California ..... var. compacta

4' Stem generally loosely branched distal to middle; leaves short-bristly, appearing green; Northwestern California, n Sierra Nevada Foothills, Central Western California ..... var. rudis

1' Ray flowers present; outer disk pappus scales generally many

5. Ray fruit ± glabrous or minutely puberulent; ray pappus 0; annual to short-lived perennial herb

6. Distal leaves not clasping; ± California Floristic Province ..... H. grandiflora

6' Distal leaves clasping; Tehachapi Mountain Area, South Coast, e Sonoran Desert ..... H. subaxillaris subsp. latifolia

5' Ray fruit hairy; ray pappus present; perennial herb

7. Disk corolla lobes ± glabrous or sparsely minutely strigose; leaf stiff-hairy, margins flat or inrolled — Cascade Range, Sierra Nevada, Modoc Plateau, sw Desert Mountains

8. Stem generally 5–13 dm; mid-stem leaves lance-triangular, margin generally ± inrolled; inner pappus bristles <= disk corolla; s Sierra Nevada Foothills ..... H. shevockii

8' Stem (1)2–5 dm; mid-stem leaves (ob)lanceolate or narrowly lance-triangular, generally flat; inner pappus bristles generally >= disk corolla ..... H. villosa

9. Mid-stem leaves (ob)lanceolate, ± moderately strigose (not bristly), glandular; Cascade Range, Sierra Nevada, Modoc Plateau ..... var. minor

9' Mid-stem leaves narrowly lance-triangular, ± sparsely scabrous to bristly, ± densely glandular; sw Desert Mountains ..... var. scabra

7' Disk corolla lobes generally sparsely short- to long-hairy (coastal or San Francisco Bay Area plants sometimes ± glabrous); leaf stiff- or soft-hairy, margins often wavy

10. Stem 9–18 cm; distal leaves narrowly oblanceolate, little reduced, bases tapering; Sierra Nevada ..... H. monarchensis

10' Stem generally 20–70(130) cm; distal leaves narrowly to widely lanceolate (if oblanceolate then corolla lobe hairs to 1 mm), generally reduced, bases rounded; Tehachapi Mountain Area, Central Western California, Southwestern California ..... H. sessiliflora

11. Margins of distal leaves flat to weakly wavy, leaf hairs ± 2 mm

12. Proximal stem sparsely woolly; distal leaves oblanceolate, little reduced, flat, strigose to long-woolly; c&s North Coast, n Central Coast, San Francisco Bay Area ..... subsp. bolanderi

12' Proximal stem bristly; distal leaves elliptic to lanceolate, generally much reduced, occasionally ± wavy-margined, strigose and bristly; generally inland c&s California ..... subsp. echioides

11' Margins of distal leaves distinctly wavy, leaf hairs ± 1 mm

13. Head not subtended by leaf-like bracts; distal leaves ± white, stiff; South Coast, Transverse Ranges, Peninsular Ranges, w Desert >= 100 m ..... subsp. fastigiata

13' Head subtended by large leaf-like bracts; distal leaves green, not stiff; s Central Coast, South Coast < 60 m ..... subsp. sessiliflora


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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