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Crater Lake sandwort, pumice sandwort

Eremogone franklinii

Franklin's sandwort

Habit Plants tufted, green, not glaucous, slightly woody at base. Plants ± cespitose, bluish green, not glaucous, with woody base.
Stems

erect, 10–20 cm, stipitate-glandular.

erect, 3–10(–15) 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 6–10 pairs, closely overlapping, not reduced;

basal blades arcuate-spreading, needlelike, (0.6–)1–2 cm × ca. 1 mm, ± rigid, herbaceous, apex spinose, glabrous, not glaucous.

Inflorescences

7–40+-flowered, ± open cymes.

3–45+-flowered, usually congested, subcapitate cymes.

Pedicels

3–20 mm, stipitate-glandular.

ca. 0.1–3(–4) mm, glabrous.

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, linear-lanceolate, (5–)8.5–12 mm, not enlarging in fruit, margins narrow, apex acuminate, glabrous;

petals white, oblong-lanceolate to narrowly spatulate, 7–9 mm, 0.8–1.1 times as long as sepals, apex rounded to blunt;

nectaries not apparent.

Capsules

4.5–5.5 mm, glabrous.

2.3–3.3 mm, glabrous.

Seeds

black to brown, oblong to pyriform, 1.8–2.4 mm, smooth to tuberculate.

black, pyriform, 1.2–1.7 mm, tuberculate.

Eremogone pumicola

Eremogone franklinii

Phenology Flowering summer.
Habitat Areas with loose pumice
Elevation 1600-2800 m (5200-9200 ft)
Distribution
from FNA
OR
[WildflowerSearch map]
[BONAP county map]
from FNA
ID; NV; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Eremogone pumicola is restricted to Crater Lake and vicinity, southwestern Oregon.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Inflorescences tightly congested cymes; pedicels 0.1-1(-3) mm; sepals 8.5-12 mm; petals 0.8-0.9 times as long as sepals
var. franklinii
1. Inflorescences somewhat congested cymes; pedicels 1-4 mm; sepals 5-8 mm; petals 1-1.1 times as long as sepals
var. thompsonii
Source FNA vol. 5, p. 69. FNA vol. 5, p. 66.
Parent taxa Caryophyllaceae > subfam. Alsinoideae > Eremogone Caryophyllaceae > subfam. Alsinoideae > Eremogone
Sibling taxa
E. aberrans, E. aculeata, E. capillaris, E. congesta, E. eastwoodiae, E. fendleri, E. ferrisiae, E. franklinii, E. hookeri, E. kingii, E. macradenia, E. stenomeres, E. ursina
E. aberrans, E. aculeata, E. capillaris, E. congesta, E. eastwoodiae, E. fendleri, E. ferrisiae, E. hookeri, E. kingii, E. macradenia, E. pumicola, E. stenomeres, E. ursina
Subordinate taxa
E. franklinii var. franklinii, E. franklinii var. thompsonii
Synonyms Arenaria pumicola Arenaria franklinii
Name authority (Coville & Leiberg) Ikonnikov: Novosti Syst. Vyssh. Rast. 10: 140. (1973) (Douglas ex Hooker) R. L. Hartman & Rabeler: Sida 21: 240. (2004)
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