Jepson eFlora: Key page    
    Vascular Plants of California
Key to families | Table of families and genera

Key to Eriastrum

View taxon page for Eriastrum

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

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

1. Perennial herb ..... E. densifolium

2. Corolla 20–37 mm

3. Corolla 20–25 mm, lobes 1/3–1/2 corolla; leaves glabrous to subglabrous; coastal dunes, San Luis Obispo, Santa Barbara cos. ..... subsp. densifolium

3' Corolla 25–37 mm, lobes ± 1/3 corolla; leaves woolly; Santa Ana River drainage, sw San Bernardino Co. ..... subsp. sanctorum

2' Corolla < 20 mm

4. Leaves strongly recurved, blade wider at base than tip, lobes spine-tipped – East of Sierra Nevada, Mojave Desert ..... subsp. mohavense

4' Leaves not recurved, blade generally equally wide at base, tip, generally not spine-tipped

5. Bracts generally 5–9 lobed; inflorescence generally terminal, 10–20 flowered; leaves subglabrous to ± canescent ..... subsp. austromontanum

5' Bracts generally (0)3–5(7)-lobed; inflorescences generally terminal and axillary, 1–10(15)-flowered; leaves ± canescent to woolly ..... subsp. elongatum

1' Annual (occasionally short-lived perennial herb)

6. Stamens attached at or just below corolla sinus, corolla 11–24 mm ..... E. pluriflorum

7. Plant ± open; leaves thread-like; corolla generally salverform, tube + throat generally > 2 × lobes; chaparral, grassland, savanna, woodland, pine forest ..... subsp. pluriflorum

7' Plant generally dense, occasionally cespitose; leaves linear; corolla narrowly funnel-shaped, tube + throat generally <= 2 × lobes; open sandy flats, deserts ..... subsp. sherman-hoytiae

6' Stamens attached well below corolla sinus, if higher, corolla < 15 mm

8. Stamens exserted > 1/2 length of corolla lobes

9. Corolla lobes bright yellow ..... E. luteum

9' Corolla lobes white, lavender, or variously blue

10. Corolla generally bilateral; stamens generally unequal ..... E. eremicum subsp. eremicum

10' Corolla ± radial (or bilateral from unequal sinuses in Eriastrum sapphirinum), stamens generally equal

11. Stamens exceeded by tips of corolla lobes; corolla lobes < 4 mm ..... E. filifolium

11' Stamens equaling to exceeding tips of corolla lobes (almost equaling to exceeding in Eriastrum sapphirinum subsp. dasyanthum); corolla lobes >= 4 mm

12. Corolla tube > 3 × throat, tube + throat generally >= 1.5 × lobes; plants ± not glandular; Central Coast, n South Coast Ranges (Monterey, San Benito cos.) ..... E. virgatum

12' Corolla tube < 3 × throat, tube + throat generally <= 1.5 × lobes; plants often glandular; s Sierra Nevada Foothills, Southwestern California (except Channel Islands), w Desert ..... E. sapphirinum

13. Flowers 3+ per cluster; corolla lobes dark to royal blue, pale blue, or white; calyx, bracts occasionally ± glandular, woolly ..... subsp. dasyanthum

13' Flowers 1–3 per cluster; corolla lobes bright blue to lavender; calyx, bracts glandular, ± woolly to subglabrous ..... subsp. sapphirinum

8' Stamens included or exserted < 1/2 length of corolla lobes

14. Anthers included

15. Upper leaves, bracts generally pinnate-3–7-lobed; inflorescence many-flowered, densely bracted, densely woolly ..... E. abramsii

15' Upper leaves, bracts entire, pinnate-1–4-lobed, or palmate-5-lobed; inflorescence few-flowered, few-bracted, ± woolly

16. Corolla 5–7 mm; seeds (1)2–4 per chamber

17. Corolla white with blue tint or streaks; anthers just at sinus ..... E. ertterae

17' Corolla white; anthers not reaching sinus ..... E. hooveri

16' Corolla >= 7 mm, white, pink, lavender, or light blue; seeds 1(2) per chamber

18. Stamens 1.5–2 mm, filaments ± 2 × anther; corolla lobes narrowly elliptic, ± 3 × longer than wide ..... E. brandegeeae

18' Stamens 0.5–1.5 mm, filaments ± = anther; corolla lobes widely elliptic, ± 2 × longer than wide ..... E. tracyi

14' Anthers exserted

19. Stamens unequal; corolla lobes generally > 1.25 mm wide

20. Corolla generally 6–9 mm; stem wiry; plants erect or spreading, generally subglabrous; leaves generally 1–3-lobed near base; East of Sierra Nevada, Desert ..... E. diffusum

20' Corolla 9–14 mm; stem generally not wiry; plants erect, woolly-hairy to occasionally subglabrous; leaves entire or 1–7-lobed near base; High Sierra Nevada, Great Basin Floristic Province, n Desert Mountains ..... E. wilcoxii

19' Stamens equal; corolla lobes generally <= 1.25 mm wide

21. Plant minutely glandular-hairy ..... E. sparsiflorum

21' Plant ± glabrous to woolly-hairy or woolly, generally ± not glandular

22. Corolla lobes pale yellow to white ..... E. harwoodii

22' Corolla lobes pale blue to pink

23. Corolla generally < 7 mm, corolla lobes without spot ..... E. rosamondense

23' Corolla >= 7 mm, corolla lobe base generally with maroon spot, occasionally faint ..... E. signatum


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].

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.