familyPlantaginaceae
genusPenstemon
subgenusPenstemon subg. Penstemon
sectionPenstemon sect. Penstemon
speciesPenstemon attenuatus
Penstemon attenuatus var. militaris
Vasc. Pl. Pacif. N.W. 4: 373. 1959.
Endemic
Basionym: Penstemon militaris Greene Leafl. Bot. Observ. Crit. 1: 166. 1906
Synonyms: P. attenuatus subsp. militaris (Greene) D. D. Keck
Revision as of 20:25, 27 May 2020 by imported>Volume Importer
Stems (17–)30–50(–70) cm. Flowers: calyx lobes lanceolate, rarely ovate, margins erose; corolla bluish purple, 10–17 mm; pollen sacs 0.6–0.8 mm, dehiscing incompletely, distal 1/5 or less usually indehiscent, connective not splitting, sutures papillate.
Phenology: Flowering Jun–Aug.
Habitat: Rocky Douglas fir and lodgepole pine forests.
Elevation: 1500–2800 m.
Discussion
Variety militaris bears incompletely dehiscent pollen sacs, which also occur in Penstemon globosus. On specimens where the extent of dehiscence of the sacs is difficult to determine, the presence of prominently papillate-toothed sutures is a fairly reliable character distinguishing var. militaris from other varieties of P. attenuatus, though the teeth can be absent. On some specimens of var. militaris, the teeth reach nearly 0.1 mm.
Selected References
None.
Lower Taxa
None.