92 



The plant doubtfully referred to this species is plentiful about Kerrville, 

 at an altitude of 1600-1800 feet. It varies in height from one to two 

 feet, has large and rather broad flowers, ranging in color from white 

 tinged with blue to almost rose color. Its leaves are inclined to be nar- 

 rower, and the flower usually not more than half the size of the P. Co- 

 baea found farther north. There are a number of specimens from Texas 

 in the Herbarium of Columbia College identical with my plants. 



April 19 (1610); -type locality, Arkansas, on the -Red river. 



Pentstemon Guadalupensis n. sp. 



(PLATE 7.) 



Low, 8-15 inches high, branching from the perennial rootstock, which 

 sends down numerous, thick, fibrous roots ; glabrous below, the in- 

 florescence glandular pubescent and viscid ; root leaves linear or 

 spatulate linear, sessile, clustered, 2-4 inches long, acute or acutish; 

 stem leaves from linear to lanceolate, sessile, becoming broader and 

 shorter as they ascend, the upper with broad, almost cordate base, 

 1-3 inches long, acute, smooth on both sides, entire, or some of 

 the upper ones sparingly denticulate, prominently one-nerved ; 

 calyx-teeth about the length of the corolla tube, lanceolate or ovate- 

 lanceolate, glandular puberulent, especially on the margins ; corolla 

 white or sometimes faintly tinged with purple, short, less than an 

 inch in length, broad in proportion, the spreading lobes almost 

 equal ; sterile filament broadened above, the upper half bearded on 

 one side with yellow hairs. 



This species belongs in the Genuini division, near P. tubiflorus and P. 

 albidus. It was distributed under the latter name, as there are speci- 

 mens in the National Herbarium identical with my plants, which are 

 called P. albidus. It is very plentiful in dry, stony ground along the 

 Guadalupe and Town Creek, altitude 1600-1650 feet, and often growing 

 in company with P. Cobaea? Sometimes large patches of ground are 

 white \\ith it. Usually several plants grow together in a clump. 

 April 19 (1609). 



Pentstemon triflorus n. sp. 



4 



(PLATE 8.) 



Herbaceous, erect, usually 2-3 feet high, simple, very glabrous up to the 

 inflorescence; root leaves spatulate, on margined petioles about 

 equal in length to the blade, entire or minutely denticulate, obtuse 

 or acutish ; stem leaves entire or dentate, the dentations sometimes 



