Overview

Distribution

Wash.
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National Distribution

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Morphology

Description

Plants perennial, glabrous, with vertical rootstock. Stems usually ascending, usually producing axillary shoots below 1st-order inflorescence or at proximal nodes, 30-50(-60) cm. Leaf blades light or yellowish green, veins scarcely prominent abax-ially, elliptic-lanceolate, occasion-ally lanceolate, 6-12 × (2-)3-6 cm, usually (2-)3(-5) times as long as wide, widest near middle, thin, not coriaceous, base cuneate, margins entire, undulate, apex acute, warty in appearance. Inflorescences terminal and axillary, terminal usually occupying distal 5- 3 of stem, dense or interrupted near base, usually broadly paniculate (branches simple or with few 2d-order branches). Pedicels articulated in proximal 3, filiform (but thickened distally), 3-6 mm, not more than 2-2.5 times as long as inner tepals, articulation indistinctly swollen. Flowers 10-20 in whorls; inner tepals, triangular, broadly triangular, or deltoid, 3-4 × 3.5-4(-5) mm, base truncate, margins entire, apex acute or subacute; tubercle 1, small, narrow, much narrower than inner tepals, smooth to weakly rugose. Achenes not seen. 2n = 20.
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Type Information

Isotype for Rumex hesperius Greene
Catalog Number: US 228592
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Card file verified by examination of alleged type specimen
Preparation: Pressed specimen
Collector(s): W. N. Suksdorf
Year Collected: 1893
Locality: Near Bingen., Klickitat, Washington, United States, North America
  • Isotype: Greene, E. L. 1901. Pittonia. 4: 234.
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Ecology

Habitat

Wet, alluvial habitats: shores, ditches; 500-1000m.
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Life History and Behavior

Cyclicity

Flowering/Fruiting

Flowering late spring-early summer.
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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: GNR - Not Yet Ranked

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Notes

Comments

Rumex hesperius is a little-known species reported only from a localized area in Washington. According to N. M. Sarkar (1958) it is “quite distinct from other species” in its general appearance—a small plant with large, broad leaves and compact inflorescences.
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