Jepson eFlora
Key to families | Table of families and genera

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

Contact/Feedback

Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [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].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.