. Plant species of concern and plant associations of Powder River county, Montana . Plant communities; Endangered plants; Rare plants; Botany; Plant conservation. season. It does not compete with sod-foniiing grasses like Kentucky bluegrass (Poa prate mis). One of the Ashland District sites where the species was recorded had burned (occuirence no. 003). Only one plant was found, indicating a capacity for sui"vival witliout providing basis for interpreting species' response to fire. We note that Dichajithelium mlcoxiaitiim, which has a similar growth form, was locally common following tlie
. Plant species of concern and plant associations of Powder River county, Montana . Plant communities; Endangered plants; Rare plants; Botany; Plant conservation. season. It does not compete with sod-foniiing grasses like Kentucky bluegrass (Poa prate mis). One of the Ashland District sites where the species was recorded had burned (occuirence no. 003). Only one plant was found, indicating a capacity for sui"vival witliout providing basis for interpreting species' response to fire. We note that Dichajithelium mlcoxiaitiim, which has a similar growth form, was locally common following tlie 1988 wildfires in the Sioux District (Heidel and Dueholin 1995). Mentzelia nuda (Pursh) Torrey & Gray Bractless mentzeha Loasa Family (Loaseae) BLM status: Watch USFS status: - Global rank: G5, State rank: SI State status summary: Bractless mentzelia is known from over five occunences in Montana, but three of tliem are historic and the numbers of plants in most occurrences are low. Dtscription: Bractless mentzelia is an herbaceous biennial or short-lived perennial witli one to a few erect, branched stems that arise from a taproot and are up to 1 m higli. The lance-shaped, alternate leaves are 4 to 10 cm long, have deeply-tootlied margins, and are petiolate below but sessile above. Foliage is covered with short, barbed hairs tliat cause it to stick to clotliing like Velcro. Flowers that open in late afternoon are borne on short stalks arising from the axils of reduced uppei' leaves, or bracts. Each flower is 4 to 9 cm across and has 10, non-overlapping, white petals and numerous exseited stamens (Figure 23). The calyx fomis a deep bowl widi 5 narrow, pointed lobes diat are 10 to 25 mm long; it also contains the ovary and bears tlie stamens. The cylindrical seed capsules are 2 to 3 cm long. Flowering in July. By comparison, Mentzelia decapetala has larger flowers diat are 8 to 15 cm across, and its petals overlap. Distribution: This species occurs from eastern Montana to Sou
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Keywords: ., bhl, bookcollectionamericana, bookleafnumber62, booksubjectbotany
