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Astragalus
eastwoodiae. Synonym: Astragalus preussii var. eastwoodiae. (Eastwood's Milkvetch.) Fabaceae (Pea Family) Semi-desert. Woodlands, shrublands, openings. Spring. Astragalus eastwoodiae, a Colorado Plateau endemic, grows in neat rounded mounds to eight inches tall. It is found in a limited altitudinal range from about 4,000' to 6,000', usually on selendiferous fine-textured soils. Fabaceae expert, Stanley Welsh, observes that this Astragalus "is closely allied to A. preussii". The two species differ as follows: Stems of A. eastwoodiae are "decumbent to ascending, forming small bushy clumps" from 8-20 cm tall; stems of A. preussii are erect and incurved-ascending from 12-50 cm tall. Leaflets of A. eastwoodiae are generally smaller (1-15 mm long) than those of A. preussii (6-28 mm long). Pods of A. eastwoodiae are spreading-descending; their peduncles are weakly ascending or reclining. Pods of A. preussii are erect or ascending; their peduncles are erect. Both are similar in flower color, with the calyx suffused dark purple and similar in color to the petals. Astragalus eastwoodiae was named and described by Marcus Jones in 1894 from a specimen he collected in Grand County, Utah in 1891. Alice Eastwood was an eminent Colorado and California botanist in the late 19th and 20th centuries. (Click for more biographical information about Eastwood.)
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Astragalus
eastwoodiae. Synonym: Astragalus preussii var. eastwoodiae. (Eastwood's Milkvetch.) Semi-desert. Woodlands, shrublands, openings. Spring. As indicated above, foliage, pods, and corolla are glabrous (smooth, not hairy). The calyx has very short, sharp, appressed hairs. Leaves are a light green, 3-13 cm long, with 13-25 leaflets 1-15 mm long. |
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Astragalus
eastwoodiae. Synonym: Astragalus preussii var. eastwoodiae. (Eastwood's Milkvetch.) Semi-desert. Woodlands, shrublands, openings. Spring. Pods are evenly inflated, spread to declined, thin-textured, and have a stipe (stem) 1.5 to 4.5 mm long (most evident in pods on the ground in the top photograph at left and in the photograph above). |
Astragalus
newberryi variety newberryi (Newberry's Milkvetch) Fabaceae (Pea Family) Semi-desert, foothills. Woodlands, openings. Spring. Astragalus newberryi has silvery soft hairs covering its leaves and large, showy flowers. Often numerous clusters of the plant occur near each other making a lovely display in its typical sandy location. Astragalus newberryi was named by Asa Gray in 1876 from a specimen collected by Sereno Watson in Nevada in 1871. |
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Astragalus
newberryi variety newberryi (Newberry's Milkvetch) Fabaceae (Pea Family) Semi-desert, foothills. Woodlands, openings. Spring. |
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Astragalus
newberryi variety newberryi (Newberry's Milkvetch) Fabaceae (Pea Family) Semi-desert, foothills. Woodlands, openings. Spring. |
Range map © John Kartesz,
County Color Key
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Range map for Astragalus eastwoodiae Range map for Astragalus newberryi |