Penstemon wilcoxii Rydb.
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Authority
New York Botanical Garden. Herbarium of Dr. Per Axel Rydberg. Purchased, 1899. Contributions from the New York Botanical Garden.
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Family
Scrophulariaceae
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Scientific Name
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Description
Species Description - An almost glabrous perennial with a cespitose caudex. Stems 3-6 dm. high, glabrous or slightly puberulent above, simple; leaves opposite, glabrous and somewhat glaucous, dentate with small sharp callous teeth, acute: the basal ones petioled, lanceolate: the lower stem-leaves sessile, oblanceolate or oblong, 3-5 cm. long; the upper lanceolate and slightly clasping: inflorescence an elongated interrupted thyrse: branches 1-2 cm. long, fastigiatecymose: calyx glabrous, about 4 mm. long, cleft ¾ its length: lobes lanceolate, acute, slightly margined below and there often sinuately toothed: corolla straight, purple, glabrous on the outside, about 15 mm. long; the lower lip longer than the upper, slightly bearded within: sterile stamen club-shaped, with a short dense brown beard.
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Discussion
This species is probably nearest related to P. humilis ; but easily distinguished by the tall stems, the sharper toothed leaves, and the numerous purple flowers.
Montana: Kalispell, 1900, E. V. IVl/cox, jyo {type in United States National Herbarium) and 368.
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Distribution
Montana
Montana United States of America North America|