Penstemon triflorus var. integrifolius

(Pennell) Cory

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.

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.

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.