TAXONOMY OF GENUS PENSTEMON:

SUBGENERA CRYPTOSTEMON AND DISSECTI

 

SUBGENUS CRYPTOSTEMON: has a single species

Species: P. personatus Keck, close-throated beardtongue. A RARE perennial with few basal leaves forming sparse rosette .5 cm (1/2) in height. see www.USDA/plants

Stems: Cauline stems sparsely-branched to 60 cm (24) tall

Leaves: Lower-most small, 25-90 mm (1-3.5) at base of stems, becoming larger 4-5cm X 3 cm (1 x 1), UC Davis photos, thin, ovate, sub-entire (tiny notches).

Inflorescence: glandular (sticky)

Calyx: 5-6 mm (<1/4) widely lanceolate

Corolla: 20-25 mm (3/8), blue-purple, glabrous to glandular outside, densely hairy inside, arched floor raises to close throat of corolla, lower lip protruding.

Anther Sacs: 1.2-1.4 mm (<1/8), opening full length, valves (sides) barely spreading.

Staminode: 4 mm (1/6) dense yellow beard, included in corolla, tip entire

Blooming: July

Habitat: yellow pine, montane forests, 1500-18 m, (4-6000)

Range: Butte and Plumas Counties, CA

 

SUBGENUS DISSECTI: has a single species

Species:  P. dissectus Elliott, dissected beardtongue, RARE; only species with fern-like leaf, photos in Davesgarden.com

Stems: sparsely branched with cymes (floral groups) 3-10 cm (1-4) long, 2-4 flowered

Leaves: upper leaves deeply, often doubly, dissected cleft almost to the center, 60 mm (2 ) long, by 30 mm (1) wide, opposite, appearing as whorls 2-3 apart on stem.  Lobes 1-2 mm wide, green.  Lower leaves obovate, entire or with a few lobes to 30 mm x 5 mm (1 x ), bracts (reduced leaves) entire.

Inflorescence: 60 cm (2) tall with bracts at base of each cyme.

Calyx: 4-5mm (<1/4) long ovate with pointed tip

Corolla: 25-30 mm (1) long, fuzzy on outside, pale lavender with white throat and purple guidelines, expanded abruptly, lower lobes slightly longer than upper, attractive.

Anther Sacs: 1.2-1.4 mm (<1/8) long, brownish, open partway from inner end, outer ends remain pouch-like.

Staminode: white with white beard at tip, which is entire and exherted.

Blooming: April to May

Habitat: stream banks on east side of Appalachian Mtns.

Range: 12 scattered counties in Georgia, some may be naturalized by man.