familyPlantaginaceae
genusPenstemon
subgenusPenstemon subg. Penstemon
sectionPenstemon sect. Cristati
speciesPenstemon triflorus
Penstemon triflorus var. integrifolius
Rhodora 38: 407. 1936.
Basionym: Penstemon triflorus subsp. integrifolius Pennell Monogr. Acad. Nat. Sci. Philadelphia 1: 251. 1935
Treatment appears in FNA Volume 17. Treatment on page 143.
Revision as of 20:24, 27 May 2020 by imported>Volume Importer
Cauline leaves: blade lanceolate to linear, margins entire or obscurely, rarely sharply, serrate. Flowers: calyx lobes 6.5–8.5 × 2.4–3.5 mm; corolla 22–30 mm.
Phenology: Flowering Apr–May(–Jul).
Habitat: Limestone prairies and bluffs.
Elevation: 400–700 m.
Distribution
Tex., Mexico (Coahuila).
Discussion
Variety integrifolius has been documented in Concho, Crockett, Edwards, Irion, Reagan, Schleicher, Sutton, Tom Green, and Val Verde counties. Specimens from Concho and Tom Green counties with margins of cauline leaves serrate as in var. triflorus and smaller flowers as in var. integrifolius are included here.
Selected References
None.
Lower Taxa
None.