Nelson : New Plants from Wyoming 355 



The nearest ally of this strongly-marked species is P. cacspitosiis 



Nutt. From this it is distinguished at once b\^ its more intricately 

 branched caudex and root system ; its longer, tufted, erect stems ; 

 its larger, acute leaves, and its green, glabrate aspect. The 



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matted, cinereous appearance of the other is in strong contrast to 

 this species. 



I am indebted to Professor C. S. Crandall for specimens of this 

 plant, collected by him near Como, Park County, Colorado, July 



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Pentstemon Coloradoensis 



Tufted, with woody roots and woody, multicipital caudex, mi- 

 nutely but closely cinereous-pubescent througliout : stems slender, 

 numerous and somewhat fascicled on the bases of the stems of the 

 previous years, erect or nearly so, developing unequally, many 

 merely small, leafy shoots, the longer ones 2-3 dm. high (includ- 

 ing the inflorescence): leaves crowded on the bases of the stems 

 and on the sterile shoots, nearly linear, acute, tapering slightly to 



the base, 10-25 ^^- long: floral leaves gradually reduced, the 

 uppermost subulate bracts : inflorescence sccund, mostly strictly 

 so, the lower peduncles about 4-flowered, shorter and fewer flow- 

 ered upward : sepals ovate, acuminate, scarious margined, about 

 as long as the corolla tube proper: corolla blue, tubular-funnel- 

 form, about 15 mm. long, not strongly bilabiate, the lobes moder- 

 ately spreading, sparsely bearded on the lower lip : sterile filament 

 short, with a close, short, yellow pubescence : anther cells dehis- 

 cent through the junction of the two cells. 



Of this species I have before me specimens from two collec- 

 tions made near IMancos, Colo., by Messrs. Baker, Earle and 

 Tracy, 1898 and distributed as P. cacspitosus Nutt. Also from 

 two collections by Professor Crandall, from Hotchkiss, Colo., 

 1892, and from- Durango, 1898, both distributed as P. linarioidcs 

 Silcri Gray. This latter is the species to which P. Coloradoensis is 

 most closely allied, but is to be distinguished by its different habit, 

 its fascicled, virgate stems, the acute (not mucronate) leaves, the 

 sccund inflorescence, the blue corolla and the sparse beard on the 

 lower lip. 



Grindelia perennis 



J 



Root woody, usually with numerous, slender secondary 



ones : stems severa! to many from the crown (single in young 

 plants), simple and decumbent at base, paniculately-corymbose 



