Flora of North America species comparison

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Eremogone aculeata

needle-leaf sandwort, prickly sandwort
Habit Plants strongly mat-forming, glaucous, often with woody base.
Stems

erect, 7–25(–30) cm, densely stipitate-glandular distally.
Leaves

basal leaves persistent;

cauline leaves in 1–3 pairs, abruptly reduced distal to lowest pair;

basal blades ascending or often arcuate-spreading, needlelike, (0.5–)1–2.5(–3.5) cm × 0.5–1.5 mm, rigid, herbaceous, apex spinose, glabrous to puberulent, glaucous.
Inflorescences

5–25+-flowered, open cymes.
Pedicels

3–25 mm, stipitate-glandular.
Flowers

sepals 1–3-veined, lateral veins less developed or all obscure, ovate, 3–4.5 mm, to 6 mm in fruit, margins broad, apex usually obtuse to rounded, abruptly acute, sparsely to densely stipitate-glandular;

petals white, obovate to oblanceolate, 4.5–10 mm, 1.5–3 times as long as sepals, apex rounded;

nectaries as lateral and abaxial rounding, with slight lateral expansion, at base of filaments opposite sepals, 0.3 mm.
Capsules

5–9 mm, glabrous.
Seeds

yellowish tan to gray, ellipsoid-oblong, 1.8–2.5(–3.2) mm, tuberculate;

tubercles rounded, elongate.
2n

= 22.

Eremogone aculeata
Phenology Flowering summer–early fall.
Habitat Rocky slopes, alluvium, volcanic areas
Elevation 1500-3400 m (4900-11200 ft)
Distribution
from FNA
CA; ID; MT; NV; OR; UT; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Some specimens from north-central California and southwestern Oregon have been named Arenaria pumicola var. californica. R. L. Hartman (1993) considered those plants to be robust forms of Eremogone aculeata, not deserving formal recognition. Based on work by M. F. Baad (1969), they warrant further study.

Reports of Eremogone aculeata from Arizona, New Mexico, and Wyoming are erroneous.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 5, p. 59.
Parent taxa Caryophyllaceae > subfam. Alsinoideae > Eremogone
Sibling taxa
E. aberrans, E. capillaris, E. congesta, E. eastwoodiae, E. fendleri, E. ferrisiae, E. franklinii, E. hookeri, E. kingii, E. macradenia, E. pumicola, E. stenomeres, E. ursina
Synonyms Arenaria aculeata, Arenaria fendleri var. aculeata, Arenaria pumicola var. californica
Name authority (S. Watson) Ikonnikov: Novosti Sist. Vyssh. Rast. 10: 139. (1973)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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