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These 281 species of Penstemon are considered valid by both World Flora Online (WFO) and Plants of the World Online (POWO), with the exception of Penstemon grandiflorus. [1] [2] In both POWO and WFO, it is regarded as a synonym of Penstemon bradburyi.
Penstemon / ˈ p ɛ n s t ɪ m ən /, [2] the beardtongues, is a large genus of roughly 280 species of flowering plants native to North America from northern Canada to Central America. . It is the largest genus of flowering plants endemic to North Ameri
Penstemon albidus in flower, Grasslands National Park, Saskatchewan, Canada. Penstemon albidus is a long lived herbaceous plant that most often blooms sometime from April to June. [8] The flowering stems are 8–60 cm in height, but more typically 15–50 cm [10] and stand upright with only a slight curve at the base. [4]
Penstemon gentianoides, the gentian beardtongue or gentian-leaved penstemon, is a species of flowering plant in the plantain family Plantaginaceae.Found on volcanic mountain slopes across Mexico and Central America, especially in Mexican mountain pine forests, it is a somewhat shrubby perennial herb that can grow up to 1.5 meters tall in good conditions.
Penstemon arenicola is a herbaceous plant with leaves that grow from its base and also from its flowering stems. [2] The plants are of a small size, [3] the flowering stems usually reaching just 7–18 centimeters (2 + 3 ⁄ 4 –7 in), but occasionally as short as 4 cm (1 + 1 ⁄ 2 in) or as tall as 30 cm (12 in). [2]
Penstemon pruinosus usually grows 8–40 centimeters (3–16 in) tall, but may occasionally grow as tall as 60 cm (24 in). [4] The stems and basal leaves sprout from a stout branched woody base. At the base of the plant, the elliptic to ovate leaves may be up 10 cm (4 in) long and 2 cm (3 ⁄ 4 in) wide and born on long petioles. The flowering ...
Penstemon eatonii is a herbaceous plant with a few to several medium height stems that are between 30 and 100 centimeters (1.0 and 3.3 ft) when full grown. [3] The stems can grow straight upright or might grow out and then curve to growing upwards.
Penstemon comarrhenus is a herbaceous plant with stems that either grow straight upwards or out a short distance before curving to grow upwards. They usually reach 40 to 80 centimeters (1.3 to 2.6 ft) in height, but may be as short as 18 cm (7 in) or as tall as 120 cm (3.9 ft) when full grown. [2]