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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 / 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
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.
Stem cuttings of young wood should be taken in spring from the upper branches, while cuttings of hardened wood should be taken in winter from the lower branches. Common bounds on the length of stem cuttings are between 5–15 centimetres (2.0–5.9 in) for soft wood and between 20–25 centimetres (7.9–9.8 in) for hard wood.
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]
Penstemon richardsonii is a perennial that is often shrubby at the base and has several slender flowering stems that are 20 to 80 cm tall. The leaves are in opposite pairs borne on the flowering stem, are sessile (no petiole) except near the base, and are sharply serrate-dentate to irregularly pinnatifid and up to 7 cm long and 3 cm wide.
Penstemon acuminatus is a short lived perennial plant that is herbaceous, lacking woody stems and may have one or more flowering stems on mature plants. [4] Its flowering stems grow straight upwards or out from the base for a short distance before growing upwards, usually reaching 20 to 60 centimeters (8 to 24 in) in height, but occasionally as short as 9 cm (4 in).
Penstemon confertus is a yellow-flowered tufted perennial that grows from a woody rhizome to 20 to 50 cm tall. The basal leaves are entire, glabrous, and lanceolate to oblong-lanceolate, up to 15 cm long and 2.5 cm wide, with a petiole about a third to half the length of the leaf.
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