Ballhead Sandwort - Arenaria congesta var. congesta
Eremogone congesta var. congesta
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, congested, glabrous; pedicels less than 0.5 mm long. Flowers: sepals glabrous, ovate to lanceolate, scarious-margined, 3–6 mm long, the tips rounded; 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)
Variety congesta has capitate, congested flowers in the inflorescence and sepals with obtuse to rounded apices.
WA and MT south to CA and AZ; most abundant in the Rocky Moutains and northern Great Basin (Kartesz 2009).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Gravelly or sandy soil of plains, mountain slopes, and ridges (Hartman et al., 2005, Fl. North America, Vol. 5).
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.