Penstemon speciosus
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| Penstemon speciosus | |
|---|---|
 | |
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Lamiales |
| Family: | Plantaginaceae |
| Genus: | Penstemon |
| Species: | P. speciosus |
| Binomial name | |
| Penstemon speciosus Dougl. ex Lindl. | |
Penstemon speciosus is a species of penstemon known by the common name royal penstemon. It is native to the western United States where it can be found in many types of habitat, including plateau and foothill scrub and subalpine mountain forests. It is a perennial herb growing erect to a maximum height near 60 centimeters. The leaves are usually lance-shaped and sometimes folded lengthwise, measuring up to 9 centimeters long. They are arranged oppositely and often clasp the stem at the bases. The showy inflorescence bears tubular flowers with expanded mouths, the largest reaching nearly 4 centimeters in length. The flowers come in many shades of light to deep blue, lavender, and purple, and usually have white throats.
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