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Bear Valley Sandwort

Eremogone ursina (Robins.) S. Ikonnikov

Comments

provided by eFloras
Eremogone ursina is known from four counties in southern California, where it is threatened by development. It is relatively distinctive in appearance and markedly separated spatially from congeners.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 5 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Flora of North America Editorial Committee
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eFloras.org
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Description

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Plants tufted, green, not glaucous, with somewhat woody base. Stems ascending to erect, 10-18 cm, often glandular-hairy. Leaves: basal leaves persistent; cauline leaves in 3-5 pairs, reduced distally; basal blades erect to ± spreading, needlelike, 0.5-1.1(-1.6) cm × 0.5-0.7 mm, rigid, herbaceous, not fleshy, apex blunt to apiculate, glabrous, ± glaucous. Inflorescences (1-)3-7-flowered, ± open cymes. Pedicels 0.3-2 mm, stipitate-glandular. Flowers: sepals 1-3-veined, lateral veins less developed, ovate, often broadly so, 1.8-3 mm, to 4.2 mm in fruit, margins broad, apex obtuse or rounded, glabrous; petals white, elliptic to oblanceolate, 2-4.5 mm, 1.4-1.6 times as long as sepals, apex rounded; nectaries as lateral and abaxial rounding of base of filaments opposite sepals, with terminal lateral groove, 0.3 mm. Capsules 4.5-6 mm, glabrous. Seeds blackish purple, suborbicular to broadly ellipsoid with hilar notch, 2.2-2.5(-3) mm, tuberculate; tubercles rounded, elongate.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 5 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Distribution

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Calif.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 5 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
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eFloras

Flowering/Fruiting

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Flowering late spring-summer.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 5 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
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eFloras

Habitat

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Pinyon-juniper woodlands on rocky (quartzite) soils; of conservation concern; 1900-2100m.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 5 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
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eFloras

Synonym

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Arenaria ursina B. L. Robinson, Proc. Amer. Acad. Arts 29: 294. 1894
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 5 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Arenaria ursina

provided by wikipedia EN

Arenaria ursina is a species of flowering plant in the family Caryophyllaceae known by the common name Bear Valley sandwort.

Distribution

It is endemic to San Bernardino County, California, where it is known from a few occurrences in the vicinity of Big Bear. It grows on quartzite pebble plain habitat in forest openings in the San Bernardino Mountains near the communities of Fawnskin, Sugarloaf, and Baldwin Lake.[1] It is an indicator species for the rare pebble plain habitat, which is unique to the area.[2] It is a federally listed threatened species.

Description

Arenaria ursina is a petite perennial herb forming small tufts no more than 18 centimeters tall. Its small, waxy leaves are needlelike and up to a centimeter long. The inflorescence is an open cyme of white flowers with five petals each under half a centimeter long and protruding purple-anthered stamens. The fruit is a toothed capsule containing 1 or 2 minute purple seeds.

Threats

The biggest threat to the survival of this species is off-roading.[1] Other threats include destruction of its habitat for development, mining activity, and disturbance of the landscape during fire suppression efforts.

References

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Arenaria ursina: Brief Summary

provided by wikipedia EN

Arenaria ursina is a species of flowering plant in the family Caryophyllaceae known by the common name Bear Valley sandwort.

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