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Penstemon species [Plantaginaceae]

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Scientific Name Penstemon cobaea USDA PLANTS Symbol PECO4
Common Name Wild Foxglove ITIS Taxonomic Serial No. 33680
Family Plantaginaceae (Plantain) Kansas Wildflowers Ref. Click Here
Description Habitat: Limestone soils on prairies and rocky areas, and sandy soils in open woods.
Plant: Erect, showy perennial 1 to 2-1/2 feet tall, single or multi-stemmed; covered with fine, dense pubescent hairs.
Leaves: Shiny ovate to obovate, 2 to 3-1/2 inches long, with sharply-toothed edges; lower leaves with petioles, mid and upper leaves with small hairs and sessile.
Inflorescence: White to light or deep lavender blossoms; corolla tube 1-1/2 to 2 inches long with two lips; upper lip 2-lobed, lower lip 3-lobed, lobes rounded and flaring; smooth inside with fine pubescent hairs outside; corolla throat has prominent purple-ish lines; 5 stamens (one unfertile staminode bearded with golden-yellow hairs).
Bloom Period: April and May.
References: "Wildflowers of the Texas Hill Country" by Marshall Enquist, "Shinners & Mahler’s Flora of North Central Texas" by Diggs, Lipscomb and O’Kennon, and Kansas Wildflowers and Grasses.
BONAP Distribution Map

Texas Status:
Native
Scientific Name Penstemon havardii USDA PLANTS Symbol PEHA2
Common Name Big Bend Beardtongue, Havard Penstemon ITIS Taxonomic Serial No. 504215
Family Plantaginaceae (Plantain) SEINet
Reference
Click Here
Description Habitat: Dry, gravelly drainages and canyon walls in higher elevations such as Chisos Basin in BBNP; endemic to Big Bend area and adjacent areas of Mexico.
Plant: Erect, perennial to 3 to 4 feet tall, multiple, unbranched, grayish stems.
Leaves: Thick and fleshy, spatulate, grayish lower leaves; light green ovate to lanceolate stem leaves, 1-1/2 to 3 inches long, sessile; up to 3 inches long and 1-1/2 inches wide.
Inflorescence: Terminal racemes of tubular, two-lipped, bright red flowers, each about an inch long; upper lip 2-lobed extending beyond the lower, 3-lobed lip.
Bloom Period: Summer and fall.
References: "Little Big Bend" by Roy Morey and "Wildflowers of Texas" by Michael Eason.
BONAP Distribution Map

Texas Status:
Native
Scientific Name Penstemon triflorus USDA PLANTS Symbol PETR2
Common Name Scarlet Penstemon, Heller's Beardtongue ITIS Taxonomic Serial No. 34005
Family Plantaginaceae (Plantain) Wildflower Center Ref. Click Here
Description Habitat: Dry calcareous soils in portions of Central Texas.
Plant: Erect, slightly hairy perennial with multiple stems, 1 to 2 feet tall.
Leaves: Dark green, glossy opposite stem leaves; lower leaves sessile, linear to lanceolate 2 to 3 inches long with toothed edges; upper leaves smaller and connate and with smoother edges.
Inflorescence: Terminal racemes of tubular, two-lipped, 5-lobed pink-to-red flowers 1 to 1-1/4 inches long, with several lines on the lobes; staminode hairless.
Bloom Period: April and May.
References: "Wildflowers of the Texas Hill Country" by Marshall Enquist, "Wildflowers of Texas" by Michael Eason and Southwest Desert Flora.
BONAP Distribution Map

Texas Status:
Native

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© Tom Lebsack 2021