Eremogone pumicola |
Eremogone stenomeres |
|
---|---|---|
Crater Lake sandwort, pumice sandwort |
meadow valley sandwort |
|
Habit | Plants tufted, green, not glaucous, slightly woody at base. | Plants densely cespitose, green, not glaucous, with woody base. |
Stems | erect, 10–20 cm, stipitate-glandular. |
erect, 7–18 cm, glabrous. |
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; cauline leaves in 5 pairs, not reduced (stems leafy); basal blades spreading, needlelike, 1.5–2 cm × 0.5–1 mm, rigid, not fleshy, apex spinose, glabrous, glaucous. |
Inflorescences | 7–40+-flowered, ± open cymes. |
5–13-flowered, open cymes. |
Pedicels | 3–20 mm, stipitate-glandular. |
4–12 mm, glabrous to stipitate-glandular distally. |
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-veined, narrowly to broadly lanceolate, 4.5–5 mm, 6.5–7.5 mm in fruit, margins narrow, apex acuminate to spinose, glabrous to stipitate-glandular distally; petals yellowish white, narrowly spatulate, 7.5–8.5 mm, 1.5–1.7 times as long as sepals, apex emarginate; nectaries as lateral and abaxial rounding of base of filaments opposite sepals, 0.3–0.4 mm. |
Capsules | 4.5–5.5 mm, glabrous. |
ca. 6 mm, glabrous. |
Seeds | black to brown, oblong to pyriform, 1.8–2.4 mm, smooth to tuberculate. |
color not known, orbicular, ca. 1 mm, surface not known (mature seeds not observed). |
Eremogone pumicola |
Eremogone stenomeres |
|
Phenology | Flowering summer. | Flowering spring. |
Habitat | Areas with loose pumice | Limestone cliffs |
Elevation | 1600-2800 m (5200-9200 ft) | 900-1200 m (3000-3900 ft) |
Distribution |
OR
|
NV |
Discussion | Eremogone pumicola is restricted to Crater Lake and vicinity, southwestern Oregon. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Eremogone stenomeres is known only from a few sites in Clark and Lincoln counties. This species was recognized for its linear petals with notched apices. Rehydration of petals from representative specimens indicates that the lamina fold lengthwise upon drying, thus the linear appearance. When rehydrated, the petals were oblanceolate, with widths within the range of related taxa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 5, p. 69. | FNA vol. 5, p. 69. |
Parent taxa | Caryophyllaceae > subfam. Alsinoideae > Eremogone | Caryophyllaceae > subfam. Alsinoideae > Eremogone |
Sibling taxa | ||
Synonyms | Arenaria pumicola | Arenaria stenomeres |
Name authority | (Coville & Leiberg) Ikonnikov: Novosti Syst. Vyssh. Rast. 10: 140. (1973) | (Eastwood) Ikonnikov: Novosti Syst. Vyssh. Rast. 11: 175. (1974) |
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