Eremogone pumicola |
Eremogone congesta |
|||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Crater Lake sandwort, pumice sandwort |
ball-head sandwort, capitate sandwort |
|||||||||||||||||||||||||||||||||||||
Habit | Plants tufted, green, not glaucous, slightly woody at base. | Plants tufted or sometimes matted, green, not glaucous, with woody base. | ||||||||||||||||||||||||||||||||||||
Stems | erect, 10–20 cm, stipitate-glandular. |
± erect, 3–40(–50) cm, glabrous or often stipitate-glandular. |
||||||||||||||||||||||||||||||||||||
Leaves | basal leaves ± deciduous; cauline leaves (2–)3–5 of equal size distally; basal blades ascending to ± spreading, narrowly linear, 1.5–3.5 cm × 1–1.5 mm, ± flexuous, ± succulent, apex green, blunt or acute to apiculate, glabrous, 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. |
||||||||||||||||||||||||||||||||||||
Inflorescences | 7–40+-flowered, ± open cymes. |
3–50+-flowered, congested and capitate or sometimes open, umbellate cymes. |
||||||||||||||||||||||||||||||||||||
Pedicels | 3–20 mm, stipitate-glandular. |
0.1–7(–15) mm or ± absent, usually glabrous, rarely stipitate-glandular. |
||||||||||||||||||||||||||||||||||||
Flowers | sepals 1–3-veined, lateral pair obscure, ovate, 3–3.8 mm, 4–4.5 mm in fruit, margins broad, apex obtuse to rounded or barely acute, stipitate-glandular; petals white, narrowly spatulate, 6.6–7.5 mm, 2 times as long as sepals, apex rounded or emarginate; nectaries as lateral and abaxial rounding of base of filaments opposite sepals, 0.3 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. |
||||||||||||||||||||||||||||||||||||
Capsules | 4.5–5.5 mm, glabrous. |
3.5–6 mm, glabrous. |
||||||||||||||||||||||||||||||||||||
Seeds | black to brown, oblong to pyriform, 1.8–2.4 mm, smooth to tuberculate. |
reddish brown to black, broadly ellipsoid to ovoid, 1.4–3 mm, tuberculate; tubercles low, rounded, often elongate. |
||||||||||||||||||||||||||||||||||||
Eremogone pumicola |
Eremogone congesta |
|||||||||||||||||||||||||||||||||||||
Phenology | Flowering summer. | |||||||||||||||||||||||||||||||||||||
Habitat | Areas with loose pumice | |||||||||||||||||||||||||||||||||||||
Elevation | 1600-2800 m (5200-9200 ft) | |||||||||||||||||||||||||||||||||||||
Distribution |
OR
|
CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; SK
|
||||||||||||||||||||||||||||||||||||
Discussion | Eremogone pumicola is restricted to Crater Lake and vicinity, southwestern Oregon. (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.) |
||||||||||||||||||||||||||||||||||||
Key |
|
|||||||||||||||||||||||||||||||||||||
Source | FNA vol. 5, p. 69. | FNA vol. 5, p. 60. | ||||||||||||||||||||||||||||||||||||
Parent taxa | Caryophyllaceae > subfam. Alsinoideae > Eremogone | Caryophyllaceae > subfam. Alsinoideae > Eremogone | ||||||||||||||||||||||||||||||||||||
Sibling taxa | ||||||||||||||||||||||||||||||||||||||
Subordinate taxa | ||||||||||||||||||||||||||||||||||||||
Synonyms | Arenaria pumicola | Arenaria congesta | ||||||||||||||||||||||||||||||||||||
Name authority | (Coville & Leiberg) Ikonnikov: Novosti Syst. Vyssh. Rast. 10: 140. (1973) | (Nuttall) Ikonnikov: Novosti Syst. Vyssh. Rast. 10: 139. (1973) | ||||||||||||||||||||||||||||||||||||
Web links |
|