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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.


Perennial herb, prostrate (non-flowering stems) or ascending to erect to mat-forming, taprooted. Leaf: needle-like to narrowly linear; vein 1. Inflorescence: terminal, open to head- or umbel-like; flowers 1–many; peduncles, pedicels 0–55 mm. Flower: hypanthium present; sepals 5, ± free, 3–7.2 mm, lance-linear to ovate, glabrous to glandular-hairy; petals 5, 2–18 mm, entire or ± notched; stamens on hypanthium; ovary ± superior, styles 3, 2.5–3 mm. Fruit: capsule, ovoid to urn-shaped; teeth 6, ascending to recurved. Seed: 1–9, ± gray, dark brown, red-brown, yellow-tan, black-purple, or ± black.
90 species: northern temperate, especially western North America, Eurasia. (Greek: solitary or deserted + seed, allusion uncertain) [Hartman & Rabeler 2004 Sida 21:237–241] Based in part on molecular evidence (Harbaugh et al. 2010 Intl J Plant Sci 171:185–198), 2 subgenera of Arenaria treated here as Eremogone.
Unabridged synonyms: [Arenaria subg. Eremogone (Fenzl) Fenzl, Arenaria subg. Eremogoneastrum F. Williams]
Unabridged references: [Hartman, Rabeler, & Utech 2005 FNANM 5:56–70]

Key to Eremogone

1. Inflorescence generally head- or umbel-like, dense to ± open; pedicels generally < 7 mm ..... E. congesta

2. Pedicels 0–0.2(2) mm; inflorescence dense

3. Leaf generally 3–8 cm, ± thread-like, not fleshy; High North Coast Ranges, High Cascade Range, n High Sierra Nevada, Warner Mountains ..... var. congesta

3' Leaf 2–3 cm, ± thread- or needle-like, ± fleshy; Klamath Ranges, High North Coast Ranges, Modoc Plateau ..... var. crassula

2' Pedicels 1–12 mm; inflorescence ± open

4. Inflorescence umbel-like, bracts generally at base; sepals 3–4 mm, obtuse ..... var. suffrutescens

4' Inflorescence not umbel-like, bracts scattered among flowers; sepals 3.5–6.5 mm, acute

5. Sepals 3.5–4.5 mm ..... var. subcongesta

5' Sepals 4.5–6.5 mm

6. Leaf 1–2 cm; sepals 4.5–5.5 mm; Desert Mountains ..... var. charlestonensis

6' Leaf 2–3.5 cm; sepals 5.5–6.5 mm; n High Sierra Nevada, Modoc Plateau ..... var. simulans

1' Inflorescence generally ± open cyme or flowers 1–2; pedicels some or all > 7 mm (± 0.5–1.5 mm in Eremogone ursina)

7. Sepals generally obtuse to rounded or broadly acute, abruptly pointed or not

8. Leaf blade 0.5–1 cm; sepals in flower 1.8–3 mm; San Bernardino Mountains ..... E. ursina

8' Leaf blade 1–6 cm; sepals in flower 3–5.5(6.5) mm; Cascade Range, n Sierra Nevada, Modoc Plateau

9. Petals 12–18 mm; stem glabrous; leaves not glaucous; fruit 7.5–9 mm ..... E. cliftonii

9' Petals 4.5–10 mm; stem glandular-hairy; leaves generally glaucous; fruit 5–7 mm ..... E. aculeata

7' Sepals acute to acuminate, ± spine-tipped or not

10. Stem 1–20 (30) cm; leaves 0.3–2 cm ..... E. kingii var. glabrescens

10' Stem generally 20–40 cm; leaves 2–6 cm

11. Sepals 3–4.3 mm, in fruit < 5.5 mm; inflorescence branches spreading; nectaries rounded, 0.3–0.4 mm ..... E. ferrisiae

11' Sepals 4.5–7.2 mm, in fruit < 8 mm; inflorescence branches erect to ascending; nectaries rectangular, 2-lobed or truncate, 0.7–1.5 mm ..... E. macradenia

12. Cauline leaves downcurved, 0.8–2 mm wide ..... var. arcuifolia

12' Cauline leaves ± ascending, 0.8–1.2 mm wide ..... var. macradenia


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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