Whitemargin Beardtongue (Penstemon albomarginatus)
Description
Penstemon albomarginatus-is an uncommon species of-penstemon-known by the common name-white-margined beardtongue. It is native to the deserts of southern-Nevada-and western-Arizona, as well as in two-desert washes-in the-Mojave Desert-in-California.It is a perennial herb with several erect stems emerging from a-taproot-in the sand, their base buried beneath the surface. The stem branches are hairless and somewhat waxy in texture, reaching up to about 35 centimeters tall. The oppositely arranged leaves are oblong or widely lance-shaped, pale green edged in white, and up to 5 centimeters long. The-inflorescence-produces several purplish-pink tubular flowers between 1 and 2 centimeters long surrounded at the bases by toothed, white-edged-sepals. The flower has some hairs in the mouth, but the-staminode-is hairless. The flowers are-pollinated-by-vespid wasps-and probably other insects, such as-carabid beetles.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum: Magnoliophyta
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Class: Magnoliopsida
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Order: Lamiales
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Family: Plantaginaceae
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Genus: Penstemon
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