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Crater Lake sandwort, pumice sandwort

sandwort

Habit Plants tufted, green. Plants perennial.
Stems

10–20 cm, glandular-hairy.

prostrate (non-flowering) or ascending to erect (flowering), sometimes mat-forming.

Leaves

basal ascending to somewhat spreading, flexuous, recurving in multiple directions, 15–35 mm, generally fleshy;

tips blunt to apiculate;

cauline (2)3–5 pairs, not closely overlapping, not reduced above

opposite; needle-like to narrowly linear, often congested at or near bases of flowering stems;

tips sharp pointed;

petioles 0;

stipules 0.

Inflorescences

terminal; open or congested cymes;

bracts present.

Flowers

sepals 3–3.8 mm, 4–4.5 mm in fruit;

tips obtuse or rounded;

petals 2–4.5 mm.

bisexual;

sepals 5; ± free, glabrous to glandular-hairy;

petals 5, white;

tips entire or slightly notched;

stamens 10; borne on hypanthium;

staminodes 0;

ovary sutures 6;

styles 3.

Fruits

4.5–5.5 mm;

valves glabrous.

capsules; ovoid to urceolate, opening by 6 ascending to recurved teeth.

Seeds

oblong to pyriform, 1.8–2.4 mm; smooth to tuberculate.

1–10, elliptic-ovoid, oblong, or sometimes spherical, 1.2–3(3.2) mm; grayish, brown; yellowish brown, or blackish; smooth to tuberculate.

. inflorescences

open;

flowers 7–40+;

pedicels 3–20 mm, glandular-hairy.

Eremogone pumicola

Eremogone

Distribution
[WildflowerSearch map]
[BONAP county map]
[BONAP county map]
Discussion

Rocky flats, talus slopes, pumice soils, coniferous forests. Flowering May–Sep. 1300–2400 m. Casc, Sisk. Native. Endemic to Oregon.

Eremogone pumicola is endemic to Oregon.

North temperate regions, especially in Asia, Europe, and western North America. ~95 species; 6 species treated in Flora.

Source Flora of Oregon, volume 2, page 553
Rich Rabeler, Ronald Hartman
Flora of Oregon, volume 2, page 551
Rich Rabeler, Ronald Hartman
Sibling taxa
E. aculeata, E. capillaris, E. congesta, E. franklinii, E. kingii
Subordinate taxa
E. aculeata, E. capillaris, E. congesta, E. franklinii, E. kingii, E. pumicola
Synonyms Arenaria pumicola
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