FIGWORT FAMILY 761 



laetus var. leptosepalus Greene ex A. Gray, Syn. Fl. N. Amer. ed. 2. 2^: 442. 1886.) Leaves 3-12 cm. long, 

 4-15 mm. wide; calyx 8-15 mm. high, the lobes linear-lanceolate, attenuate. Chapparal slopes, in rocky or 

 sandy soil, Upper Sonoran and Transition Zones; Tehama County to Placer County, California. Type locality: 

 Butte County. 



Penstemon laetus subsp. Roezlii (Kegel) Keck, Univ. Calif. Pub. Bot. 16: 390. 1932. {Penstemon 

 Roezlii Kegel, Gartenfl. 21:239. 1872; P. cmerascens Greene, Leaflets Bot. Obs. 1: 161. 1906; P. laetus var. 

 Roezlii Jepson, Man. Fl. PI. Calif. 916. 1925; P. gracilentus var. ursorum Jepson, loc. cit.) Leaves 2-7 mm. 

 long, 2-12 mm. wide; calyx 4-7 mm. high; corolla 14—20 mm. long, 5-9 mm. wide pressed. Transition and 

 Canadian Zones; central Oregon (Wheeler County), southward into the Cascade Kange and Sierra Nevada, 

 more commonly on the eastern slope, to Lake Tahoe and Mono County, California, and adjacent Nevada. Type 

 locality: Sierra Nevada. 



Penstemon laetus subsp. sagittatus Keck, Univ. Calif. Pub. Bot. 16: 395. 1932. (Pensteman laetus var. 

 sagittatus McMinn, 111. Man. Calif. Shrubs 518. 1939; P. sagittatus Pennell, Notulae Naturae 71: 15. 1941.) 

 Leaves 2-7 cm. long, 2-4(-8) mm. wide; corolla 20-30 mm. long, 6-9 mm. wide pressed, the throat straight or 

 incurved dorsally, ampliate ventrally, somewhat constricted at junction with lip, the lips moderately if at all 

 spreading; anthers sagittate, often very slender, dehiscent three-fifths to four-fifths their length. Transition 

 and Canadian Zones; Siskiyou Mountains, Oregon, and Modoc County to Del Norte and Humboldt Counties, 

 California. Type locality: Mount Shasta. 



65. Penstemon filiformis (Keck) Keck. Thread-leaved Penstemon. Fig. 4702. 



Penstemon laetus subsp. filiformis Keck, Univ. Calif. Pub. Bot. 16: 394. 1932. 

 Pensteman laetus var. filiformis McMinn, 111. Man. Calif. Shrubs 517. 1939. 



Open subshrub, very woody at base, 2-5 dm. high, the herbage bright green and glabrous 

 below the glandular-pubescent inflorescence, or the slender stems puberulent. Leaves all of one 

 kind, filiform, tightly involute, 2-7 cm. long, 0.5-1 mm. wide (or when occasionally flat up 

 to 2 mm. wide), the lower ones bearing fascicles in their axils; thyrsus strict, subracemose, 

 the short spreading peduncles mostly 1 -flowered; calyx 3.5-5 mm. high, the lobes lanceolate, 

 acuminate; corolla deep blue with purple tube, 14-18 mm. long, 5-7 mm. wide pressed, gaping; 

 anthers inverted U-shaped, 1.5-1.6 mm. long, merely scabrid at sinus and moderately spinulose 

 at suture, dehiscent half their length, n = 8. 



Open rocky gulches and flats. Transition Zone; Sacramento Kiver Canyon, Shasta County, California. 

 Type locality: between Lamoine and Sims. June. 



66. Penstemon neotericus Keck. Derived Penstemon. Fig. 4703. 



Penstemon neotericus Keck, Univ. Calif. Pub. Bot. 16: 398. 1932. 



Subshrub 2-6 dm. high, the herbage glabrous and blue-glaucous below the glandular- 

 pubescent inflorescence, the stems numerous and erect. Leaves crowded toward base of stems, 

 more lax above, coriaceous, the basal narrowly oblanceolate to spatulate, 2-6 cm. long, 3-9 mm. 

 wide, the cauline lanceolate to narrowly ovate, the uppermost amplexicaul ; thyrsus strict, 

 usually elongated, the 1- to 2-flowered peduncles divergent; calyx 4-7 mm. high, the lobes 

 lanceolate to ovate-oblong; corolla blue-purple, the limb azure, the buds yellowish, 25-35 mm. 

 long, 8-12 mm. wide pressed, tubular-campanulate, gaping, glabrous within ; anthers narrowly 

 cordate, 2.5-3.2 mm. long, not as wide, white-hirsute at sinus, the sacs dehiscent one-half to 

 three-fourths their length, the suture margin densely spinose ; staminode glabrous, scarcely at 

 all dilated, n = 32. 



Dry pine woods. Transition Zone; Lassen and Shasta Counties to Sierra County, California. Type locality: 

 halfway between Chester and Westwood, Plumas County. May-Aug. This species is an amphiploid derivative of 

 P. laetus and P. azureus. 



67. Penstemon azureus Benth. Azure Penstemon. Fig. 4704. 



Penstemon azureus Benth. PI. Hartw. 327. 1849. 

 Penstemon glaucifolius A. Gray, Pacif. K. Kep. 6^: 82. 1857. 

 Penstemon Jeffreyanus Hook. Bot. Mag. 84: pi. 5045. 1858. 

 Penstemon azureus var. Jeffreyanus A. Gray, Bot. Calif. 1: 561. 1876. 

 Penstemon heterophyllus var. azureus Jepson, Man. Fl. PI. Calif. 917. 1925. 



Subshrub 2-5 dm. high, the herbage blue-glaucous and glabrous throughout. Basal leaves 

 oblanceolate to obovate, short-petiolate, 1.5-6 cm. long, 5-18 mm. wide, the cauline lanceolate 

 to oblong or ovate, obtuse, acute, or acuminate, amplexicaul ; thyrsus strict, subsecund, the 

 peduncles erect; calyx 3.5-6 mm. high, the lobes oblong or obovate, abruptly contracted to 

 a cuspidate or mucronate tip, sometimes acuminate ; corolla deep blue-purple, the buds yellowish, 

 20-30 mm. long, 7-12 mm. wide pressed, tubular-campanulate, gaping, glabrous ; anthers cordate, 

 as broad as long, 2.2-3.3 mm. long, more or less hirsute at sinus, the sacs dehiscent one-half 

 to three-fourths their length, the suture margin densely spinose ; staminode dilated at the 

 usually glabrous tip. n = 24. 



Chaparral openings and forested slopes, lower Transition Zone to upper Canadian Zone; southwestern 

 Oregon to Humboldt, Glenn, and Placer Counties, California, rare southward to Fresno County. Type locality: 

 dry streams of the Sacramento Valley. May-Aug. 



Penstemon azureus subsp. angustissimus (A. Gray) Keck, Univ. Calif. Pub. Bot. 16: 402. 1932. (Pen- 

 stemon azureus var. angustissimus A. Gray, Svn. Fl. N. Amer. 2i:272. 1878.) Herbage paler yellow-green; 

 leaves very narrow, 2-7 cm. long, the lower 2-5 mm. wide, the uppermost 3-9 mm. wide and widest at the 

 sessile base; calyx-lobes oblong or obovate, extending into an abrupt subulate tip 1-3 mm. long. Sierran foot- 

 hills from Butte to Fresno (bounties, California; rare in western Glenn County. Type locality: Yosemite 

 Valley. 



