

170 BOTANY OF THE DEATH VALLEY EXPEDITION. 



Pentstemon davidsonii Greene, Pittonia, ii. 241 (1892). Type locality, '''on Mt. 

 Conness, at an altitude of 12,300 feet." 



This plant is clearly distinguishable from P. newbcrryi by its purple corollas, in- 

 cluded antbers, and smaller, entire leaves, that plant having a red corolla, anthers 

 visible in dried specimens, and larger, serrate leaves. It was found at timber line 

 above the belt of P. newbcrryi, and has been collected at Mono Pass, on Mount Shasta, 

 and in the Cascades. Our specimens came from Farewell Gap (No. 1574), and from 

 the mountains north of Whitney Meadows (No. 1065). 



Pentstemon fruticiformis sp.nov. 



Perennial, suffmtescent, 30 to 50 cm. high, much branched from the base, glabrous 

 throughout; leaves narrowly linear-lanceolate, 3 to 5 cm. long, 2.5 to 5 mm. broad, 

 entire; inflorescence paniculate; pedicels and internodes of the branches of the 

 panicle commonly 1 or 2 cm. long; sepals ovate, abruptly acute or short-acuminate, 

 4 to 5 mm. long, the narrow hyaline margins entire or obsolete! y denticulate; corolla 

 pink or pale rose-color, about 2.5 cm. long, cleft about one-third its length, the 

 throat broad, the lower lip bearded, otherwise glabrous; fertile stamens glabrous, 

 the anthers dehiscent through the commissure, andexplanate ; sterile filament densely 

 boarded at the apex; capsule narrowly ovate, with a spinescent acuminatum, the 

 whole 1 to 1.5 cm. long, the four valves little diverging at maturity; mature seeds 

 not seen. 



Type specimen in the United States National Herbarium, No. 2044, Death Valley 

 Expedition, collected June 24, 1891, in Wild Rose Canon, Panamint Mountains, 

 Inyo Comity, California, by Vernon liailey. 



The specific name is descriptive of the habit of the plant, which in its nutcb 

 branched, rounded form resembles a typical desert shrub. The species has been col- 

 lected in fruit in the Mohave, Desert, by G. R. Vasey (No. 403 of 1880). In the Pana- 

 mint Mountains the plant is an abundant and characteristic species of the nut pine 

 belt. 



Pentstemon glaber Pursh, Fl. ii. 738 (1814). Type locality, "in Upper Louisiana." 

 Near Crystal Spring, Coso Mountains (No. 922), and in Wood Canon, Grapevine 

 Mountains (No. 175!)). Our plants do not agree with Pursh's description in all re- 

 spects, but they belong rather to the type form than to any of the varieties indi- 

 cated by Gray in the Synoptical Flora. 



Pentstemon labrosus (Gray) Bot. Cal. i. 022 (1870), as P. barbatus Jubrosns; 

 Hook. f. Bot. Mag. ex. t. 6738 (1884). Type locality, " on Mount Pinos [California], 

 south of Tejon, at 7,000 feet." 



Frazier Mountain (No. 1206). 



Pentstemon laetus Gray, Proc. Post. Soc. Nat. Hist. vii. 147 (1859). Typo 

 locality, near "Fort Tejon," California. 



Near Caliente (No. 1096). 



Pentstemon newberryi Gray, Pac. R. Rep. vi. pt. iii. 82 (1857). Type locality, 

 "on rocks, forming broad tufts near Mount St. Joseph's, N. California." 

 In the high Sierra Nevada (Nos. 1494, 1832, 2088). 



Pentstemon palmeri Gray, Proc. Amer. Acad. vii. 379 (18G8). Type localities, 

 "Arizona, in Skull Valley, and on Rio Verde, near Fort Whipple." 



Near Crystal Spring, Coso Mountains (No. 919), and near Callvillo, Nevada (No 

 1902). 



Pentstemon ternatus Gray, Pot. Mex. Bound. 115 (1859)— Torr. MS. Type 

 locality, "mountains east of San Diego." 

 Near Fort Tejon (No. 1107). 



