Penstemon pinifolius, the pine-leaved penstemon or pine-needle beardtongue,[1] is a species of flowering plant in the plantain family Plantaginaceae, native to the southwestern USA.
| Penstemon pinifolius | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Lamiales |
| Family: | Plantaginaceae |
| Genus: | Penstemon |
| Species: | P. pinifolius
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| Binomial name | |
| Penstemon pinifolius | |
Growing to 20 cm (7.9 in) tall and broad, it is a small evergreen shrub with arching stems of narrow needle-like leaves and bright scarlet tubular flowers in summer. Its natural habitats in the rocky uplands of Arizona and New Mexico[2] are a clue to its preferences in cultivation. Though moderately hardy to −10 °C (14 °F) it requires an extremely well-drained, sunny position with some protection from hard frosts in winter.[3]
The species[3] and the cultivar 'Wisley Flame' [4] have both gained the Royal Horticultural Society's Award of Garden Merit. 'Mersea Yellow' is another notable cultivar, with brilliant lemon-yellow flowers.[2]
References edit
- ^ "Penstemon pinifolius". Gardenia.net. Retrieved 30 January 2021.
- ^ a b "Penstemon pinifolius 'Mersea Yellow'". Missouri Botanical Garden. Retrieved 30 January 2021.
- ^ a b "Penstemon pinifolius". www.rhs.org. Royal Horticultural Society. Retrieved 24 January 2021.
- ^ "Penstemon pinifolius 'Wisley Flame'". RHS. Retrieved 18 January 2021.
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