Eremogone eastwoodiae |
Eremogone congesta |
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Eastwood's sandwort |
ball-head sandwort, capitate sandwort |
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Habit | Plants densely matted, green, not glaucous, with woody base. | Plants tufted or sometimes matted, green, not glaucous, with woody base. | ||||||||||||||||||||||||||||||||||||||||
Stems | erect, (8–)10–25 cm, glabrous or stipitate-glandular. |
± erect, 3–40(–50) cm, glabrous or often stipitate-glandular. |
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Leaves | basal leaves persistent; cauline leaves usually in 2–4 pairs, reduced distally; basal blades spreading to recurved, needlelike, 1–3(–3.5) cm × 0.5–0.7 mm, flexuous to rigid, herbaceous, apex spinose, glabrous to puberulent, not glaucous. |
basal leaves persistent or not; cauline leaves in 3–5 pairs, similar, but reduced distally; basal blades erect-ascending to arcuate-spreading, subulate or needlelike to filiform, (0.8–)2–11(–14) cm × 0.4–2 mm, flexuous or rigid, herbaceous to ± fleshy, apex obtuse to sharply acute or spinose, glabrous, sometimes glaucous. |
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Inflorescences | (1–)3–17-flowered, ± open cymes. |
3–50+-flowered, congested and capitate or sometimes open, umbellate cymes. |
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Pedicels | 3–30 mm, glabrous or stipitate-glandular. |
0.1–7(–15) mm or ± absent, usually glabrous, rarely stipitate-glandular. |
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Flowers | sepals green or purplish, 1–3-veined, lanceolate to ovate-lanceolate, (3.5–)4–6.5 mm, not enlarging in fruit, margins broad, apex narrowly acute to acuminate, glabrous or stipitate-glandular; petals yellowish white or sometimes brownish to reddish pink, broadly oblong-elliptic to oblanceolate, 4–6.5 mm, 0.9–1.1 times as long as sepals, apex rounded; nectaries narrowly longitudinally rectangular, apically cleft or emarginate, adjacent to filaments opposite sepals, 1–2 mm. |
sepals 1–3-veined, sometimes obscurely so, ovate to lanceolate, 3–6.5 mm, not expanding in fruit, margins narrow, apex obtuse or acute to acuminate, rarely spinose, glabrous (or glandular in var. prolifera); petals white, oblong, 5–8(–10) mm, 1.5–2 times as long as sepals, apex entire to slightly emarginate; nectaries as lateral and abaxial mound with crescent-shaped groove at base of filaments opposite sepals, 0.3 × 0.15–0.2 mm. |
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Capsules | 4–6 mm, glabrous. |
3.5–6 mm, glabrous. |
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Seeds | brown, ovoid to suborbicular with hilar notch, 1.2–1.7 mm, papillate, subechinate; tubercles conical. |
reddish brown to black, broadly ellipsoid to ovoid, 1.4–3 mm, tuberculate; tubercles low, rounded, often elongate. |
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Eremogone eastwoodiae |
Eremogone congesta |
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Distribution |
AZ; CO; NM; UT; WY
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CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; SK
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Discussion | Varieties 2 (2 in the flora). The Hopi Indians may use Eremogone eastwoodiae as an emetic (B. Maguire 1960). The nectaries in Eremogone eastwoodiae are different from those of most other species of the genus in North America since they are a separate bilobed structure adjacent to, but not a direct enlargement of, the filament bases opposite the sepals. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 9 (9 in the flora). Eremogone congesta is highly polymorphic; it has been been divided into 11 varieties (nine recognized here), most of which are distinctive and locally distributed. M. F. Baad (1969) noted two patterns of variation of different origin within E. congesta, but he did not present a revised classification. While most specimens of the four varieties with dense inflorescences do not exhibit evident pedicels, the occasional plant does bear one or more pedicels to 1–2 mm, sometimes in secondary inflorescences. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 5, p. 63. | FNA vol. 5, p. 60. | ||||||||||||||||||||||||||||||||||||||||
Parent taxa | Caryophyllaceae > subfam. Alsinoideae > Eremogone | Caryophyllaceae > subfam. Alsinoideae > Eremogone | ||||||||||||||||||||||||||||||||||||||||
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Synonyms | Arenaria eastwoodiae, Arenaria fendleri var. eastwoodiae | Arenaria congesta | ||||||||||||||||||||||||||||||||||||||||
Name authority | (Rydberg) Ikonnikov: Novosti Syst. Vyssh. Rast. 10: 139. (1973) | (Nuttall) Ikonnikov: Novosti Syst. Vyssh. Rast. 10: 139. (1973) | ||||||||||||||||||||||||||||||||||||||||
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