. Plant species of concern and plant associations of Powder River county, Montana . Plant communities; Endangered plants; Rare plants; Botany; Plant conservation. Astragalus barrii Barneby Ban's mi Ik vetch Bean Family (Fabaceae) BLM status: Watch USFS status: Sensitive Global rank: G^, State rank: S3 State status summary: Ban's milkvetch is a regional endemic with more tlian 20 occunences in Montana. It has no immediate tlireats but is potentially vuhierable to exotic species invasion through disturbances of fire and coalbed metliane developments. Description: Ban's milkvetch is a perennial t
. Plant species of concern and plant associations of Powder River county, Montana . Plant communities; Endangered plants; Rare plants; Botany; Plant conservation. Astragalus barrii Barneby Ban's mi Ik vetch Bean Family (Fabaceae) BLM status: Watch USFS status: Sensitive Global rank: G^, State rank: S3 State status summary: Ban's milkvetch is a regional endemic with more tlian 20 occunences in Montana. It has no immediate tlireats but is potentially vuhierable to exotic species invasion through disturbances of fire and coalbed metliane developments. Description: Ban's milkvetch is a perennial tliat grows in low. dense mats. Leaves have 3 nairowly lance-shaped leaflets 1 to 4 cm long and densely covered witli short white hairs (Figures 1 and 2). Stipules at the leaf bases are membranous. Puiple or pinkish-purple pea shaped flowers are borne in a naiTow, open, and few-flowered inflorescence Astragalus gilxiflorus and Astragalus Jn/aUtius. Both have white flowers and a longer calyx tube (6 to 16 mm) Wiinn Hit Astragalus barrii calyx tube length ( to 5 mm). They also have peduncles that are short (< mm) or absent compared to Astragalus barrii peduncle lengtli (7 to 24 mm).. Figure 1. Illustration oiAstragalus barrii (Figure 3). The petals are 7 to 17 mm long. The calyx is 3 to 5 mm long and densely covered with long, white hairs. The sparsely white, haiiy pod is nanowly elliptical, 4-8 mm long, and 1 to 2 mm in diameter. Flowering occurs in May-early June and fmiting from late May-June. The only other mat-fomiing species with 3-leaflets in the range of Astragalus barrii in Montana are. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Heidel, Bonnie L; Jean, Catherine; Crispin, Susan; Montana. Bureau of Land Management; Montana Natural Heritage Program. Helena, Mont. : Montana Natural Heritage
Size: 1582px × 1578px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bhl, bookcollectionamericana, bookleafnumber53, booksubjectbotany
