738 SCROPHULARIACEAE 



Section 9. Emersus. 



A single species. 76. P. Bridgesii. 



Subgenus III. Cryptostemon. 



A single species. 77. P. personatus. 



Subgenus IV. Dasanthera. 



Low shrubs with mostly erect or decumbent stems 20 cm. or more tall. 



Leaves blue-glaucous, broadly oval, to 6 cm. long; corolla 35-40 mm. long, lilac; inflorescence glabrous. 



78. P. Barrettae. 



Leaves not glaucous, smaller; inflorescence glandular-pubescent (rarely glabrate). 

 Corolla bluish or purple. 



Leaves linear-lanceolate to elliptic, acute, entire or somewhat serrate; corolla lavender-violet. East 



of the crest of the Cascades. 79. P. fruticosus. 



Leaves oblong-elliptic to oval, obtuse, obviously toothed; corolla bright purple. West of the crest 

 of the Cascades. 80. P. Cardwelhx. 



Corolla rose- red or amaranth purple. California. 81. P. Newberryi. 



Cespitose mats mostly 10 cm. or less tall. 



Corolla rose; leaves glaucous, often more or less hirtellous, serrate. 82. P. rupicola. 



Corolla blue-violet; leaves green, glabrous, entire or serrate. 83. P. Menziesii. 



Subgenus V. Nothochelone. 



Represented by a single species. 84. P. nemorosus. 



Subgenus VI. Hesperothamnus. 



Corolla whitish, yellowish, or fulvous, not distinctly tubular. 



Inflorescence spicate-racemose ; pedicels shorter than calyces; flowers solitary or geminate. 



85. P. Rothrockii. 



Inflorescence paniculate or thyrsoid; pedicels longer than calyces; flowers usually geminate or several. 



Staminode glabrous; corolla white tinged with pink, long-hirsute externally. 



86. P. brevtflorus. 



Staminode densely bearded; corolla short-pubescent externally. 



Corolla about 4 mm. wide, ftilvous with yellowish lower lip; stems glaucous; leaves denticulate. 



87. P. Letnmonii. 



Corolla about 10 mm. wide, yellow; steins not glaucous; leaves usually entire. 



88. P. antirrhinotdes. 

 Corolla red, distinctly tubular. 



Leaves opposite, narrowly elliptic to narrowly cordate; stems not glaucous. 



Staminode bearded only apically; leaves mostly subcordate; scandent shrub. 



89. P. cordif alius. 



Staminode bearded throughout; leaves tapering to base; not scandent. 90. P. corymbosus. 

 Leaves temate, linear-lanceolate; stems glaucous. 91. P. tcrnatus. 



1. Penstemon procerus Dougl. Small-flowered Penstemon. Fig. 4638. 



Penstemon procerus Dougl. ex. R. Grab. Edinb. New Phil. Journ. 7: 348. 1829. 



Penstemon tnicranthus Nutt. Journ. Acad. Phila. 7: 45. 1834. 



Penstemon confertus var. caeruteo-purpureus A. Gray, Proc. Amer. Acad. 6: 72. 1862. 



Penstemon confertus yar. procerus Coville, Contr. U.S. Nat. Herb. 4: 169. 1893. 



Penstemon procerus var. micrantkus M. E. Jones, Bull. Univ. Mont. Biol. Ser. 15: 45. 1910. 



Stems slender, l-4(-7) dm. high, the herbage essentially glabrous, the basal rosette feebly- 

 developed. Leaves deep green, thin, the basal lanceolate to oblanceolate, 2-6 cm. long including 

 the short slender petiole, the cauline broadly oblong to narrowly lanceolate; thyrsus strict, of 

 1-6 dense clusters, the lower often well spaced; calyx-lobes 3-6 mm. long, elliptic to obovate, 

 scarious-margined but quite entire, with caudate tip equaling or exceeding basal portion ; corolla 

 blue-purple, sparingly to considerably bearded on palate, the limb spreading; anther-sacs 0.4- 

 0.7 mm. long; staminode included, with few short yellow hairs at apex, n = 8, 16. 



Common on meadow borders or on drier openly timbered slopes. Transition and Canadian Zones; southern 

 Alaska to eastern Washington and Oregon, and east to Wyoming and southern Colorado. Type locality: 

 northwestern North America. May-Aug. 



2, Penstemon Tolmiei Hook. Alpine Penstemon. Fig. 4639. 



Penstemon Tolmiei Hook. Fl. Bor. Amer. 2:98. 1838. 



Stems slender, 0.5-1.5 dm. high, the basal rosette well-developed, glabrous throughout. 

 Leaves deep green, rather firm, the basal lanceolate to elliptic, 1.5-5 cm. long including the 

 short slender petiole, the cauline lance-oblong, amplexicaul ; thyrsus usually reduced to a single 

 cluster; calyx 3-5 mm. high, the lobes usually caudate-tipped, if merely sharply acute then very 

 scarious, lacerate, and elongated; corolla deep blue-purple or sometimes pale yellow, 9-11 mm. 

 long,^ somewhat ampliate, the lower lip larger than the upper, the palate densely bearded, the 

 limb spreading; anther-sacs 0.5 mm. long; staminode included, well bearded, n = 8. 



Rocky or meadowy slopes, Hudsonian and Arctic-Alpine Zones; western British Columbia south to Mount 

 Adams, Washington. Type locality: Mount Rainier. June-Aug. 



Penstemon Tolmiei subsp. formosut (A. Nels.) Keck, Amer. Midi. Nat. 33: 147. 1945. (Penstemon 

 formosus A. Nels. Proc. Biol. Soc. Wash. 17: 100. 1904; P. chionophilus Greene, Leaflets Bot. Obs. 1: 161. 

 1906; P. cacuminis Pennell, Notulae Naturae No. 71:2. 1941.) Densely cespitose; stems 0.4-1.5 dm. high, 

 their leaves much reduced; basal leaves with ovate blades only 1 cm. long, or rarely much narrower and folded; 



