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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.



Robert Patterson & J. Mark Porter

Annual, perennial herb, subshrub. Stem: generally erect, generally branched from base. Leaf: cauline, alternate or opposite, entire or lobes 3–9, pinnate or palmate, linear to narrow-lanceolate or spoon-shaped. Inflorescence: open or dense clusters or cyme or flower 1; bracts leaf-like; flowers sessile or not. Flower: corolla funnel-shaped, salverform, or bell-shaped; stamens attached at 1 level, included or exserted, pollen yellow. Fruit: capsule, valves 3(4). Seed: generally many, when wet gelatinous to not.
24 species: western North America. (Greek: flax flower) [Porter & Johnson 2000 Aliso 19:55–91] Other taxa in TJM (1993) moved to Leptosiphon.

Key to Linanthus

1. Perennial herb, subshrub; leaf lobes sharp-tipped

2. Leaves opposite, pinnate-3-lobed; corolla lobes 5–6; capsules generally 4-valved — San Jacinto Mountains ..... L. jaegeri

2' Leaves generally alternate, palmate- or pinnate-3–many-lobed; corolla lobes 5; capsules generally 3-valved

3. Corolla salverform, lobes 9–18 mm, generally pink; 0–1500 m ..... L. californicus

3' Corolla funnel-shaped, lobes 7–10 mm, white or pink; 1700–4000 m ..... L. pungens

1' Annual; leaf lobes not sharp-tipped

4. Corolla generally open evening (if open daytime then limb > 10 mm wide); calyx membrane wider than lobes; corolla lacking red marks near throat

5. Calyx glandular-hairy ..... L. jonesii

5' Calyx hairy or not, not glandular

6. Calyx 4–5 mm, hairy adaxially ..... L. arenicola

6' Calyx 8–14 mm, glabrous adaxially

7. Corolla tube without hairy pads where stamens attached ..... L. bigelovii

7' Corolla tube with hairy pads where stamens attached ..... L. dichotomus

8. Corolla closed daytime, open evening; California except Modoc Plateau ..... subsp. dichotomus

8' Corolla open daytime, evening; n San Francisco Bay Area, North Coast Ranges ..... subsp. meridianus

4' Corolla open daytime, limb generally < 10 mm wide; calyx membrane generally narrower than lobes (if wider then corolla with red marks near throat)

9. Leaves alternate (opposite or ± alternate in Linanthus concinnus)

10. Leaf linear to thread-like; corolla lobes yellow ..... L. filiformis

10' Leaf oblong, lanceolate, or narrowly oblanceolate; corolla lobes white

11. Plant < 3 cm, stem not glandular; calyx membrane ciliate; Desert Mountains (Little San Bernardino Mtns), w Sonoran Desert ..... L. maculatus

11' Plant > 3 cm, stem glandular; calyx membrane not ciliate; s High Sierra Nevada, Great Basin Floristic Province, Mojave Desert

12. Corolla throat with 2 purple marks below lobes, tube and throat exserted from calyx ..... L. campanulatus

12' Corolla throat lacking purple marks, tube and throat included in calyx ..... L. inyoensis

9' Leaves opposite (or ± alternate in Linanthus concinnus)

13. Membrane ± not connecting calyx lobes; corolla tube inconspicuous

14. Stem thread-like, openly branched at base; calyx lobes with purple marks at base ..... L. bellus

14' Stem not thread-like, compactly branched; calyx lobes without purple marks at base

15. Corolla bell-shaped, lobes white, base with 2 red marks ..... L. demissus

15' Corolla funnel-shaped, lobes blue-purple or white, base with 1–2 purple marks ..... L. parryae

13' Membrane connecting calyx lobes; corolla tube conspicuous

16. Leaf lobes 0; corolla lobe tips fine-toothed ..... L. dianthiflorus

16' Leaf lobes deep; corolla lobe tips ± entire

17. Calyx membrane much wider than lobes — San Gabriel Mountains ..... L. concinnus

17' Calyx membrane as wide as lobes

18. Corolla lobes generally white, with 1 red mark at base, 3–4 mm, tube and throat ± exserted from calyx — c San Bernardino Mountains ..... L. killipii

18' Corolla lobes generally pink, with 2 purple marks at base, 1 at each sinus, 5–8 mm, tube and throat long-exserted from calyx ..... L. orcuttii


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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