Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Rock-loving Sandwort - Arenaria congesta var. lithophila
Other Names:  Eremogone congesta var. lithophila

Native Species

Global Rank: G5T3T5
State Rank: SNR

Agency Status
MNPS Threat Rank:

External Links

General Description
Perennial from a branched caudex, forming loose mats. Stems erect, simple, 5–30 cm. Leaves filiform, flexuous or rigid, glabrous, 2–8 cm long, shorter above. Inflorescence many-flowered, mostly open, glabrous; pedicels up to 6 mm long. Flowers: sepals glabrous, ovate to lanceolate, scarious-margined, 3–6 mm long; petals oblong, 5–8 mm long. Capsules glabrous, 3–6 mm long (adapted from Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Variety lithophila can be distinguished from the other varieties in Montana by its more open inflorescence (the flowers are not capitate or crowded).

Species Range

Range Comments
AB and SK south through ID, MT, WY, CO and UT (Kartesz 2009).

Observations in Montana Natural Heritage Program Database
Number of Observations: 65

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

Open, rocky, sagebrush slopes and hillsides; 800-3100 m (Hartman et al. 2005, Fl. North America, Vol. 5).

Login Logout
Citation for data on this website:
Rock-loving Sandwort — Arenaria congesta var. lithophila.  Montana Field Guide.  .  Retrieved on , from