270 Nelson : New Plants from Wyoming 



toothed at the apex, the middle tooth the largest.: the lip short, 



its three teeth acuminate and inflexed, only about ^ as long as the 

 galea : style exceeding the galea, stigma obscurely two-lobed : 

 capsule ovate, I cm. long. 



It seems probable that specimens of this occur in herbaria as 

 C. pallida septentrionalis Gray, a species which, now that Mr. 

 Greenman has cleared up some of the difficulties connected with 

 the C. pallida group,* had best be written C. acuminata (Pursh) 

 Spreng. Though this latter is undoubtedly an aggregate, so far 

 as specimens are concerned as C. pallida had long been, and while 

 I shall not at present attempt to state the limits and characters 

 of that species, there is enough unanimity among the earlier 

 authors to justify the separation of the species now proposed. 

 The two may be distinguished by the very marked difference of 

 color, by the character of the bracts and leaves and by their dif- 

 ferent geographical range. C. lauta is, so far as known to the 

 writer, a species of the central Rockies, where it occurs on moist 

 slopes at sub-alpine to alpine stations. 



Type no. 6708, Dunraven Peak, Yellowstone Park, Aug. 29, 

 1899. 



^ Porterella eximia 



Perennial (?) : stems simple, about 1 dm. high, semi-fleshy, 

 ascending or erect, the short internodeseach bearing a single leaf, 

 continued below the surface of the soil as an ascending or horizon- 

 tal rootstock with numerous whorled roots at the nodes : leaves 

 linear, gradually long-acuminate from the dilated base, 15-25 

 mm. long, the uppermost (floral) broader, almost lanceolate .-'flow- 

 ers few, singly in the axils of the crowded uppermost leaves : pe- 

 duncles short, usually less than half as long as the subtending 

 leaf: sepals foliaceous, broadly linear, 6-8 mm. long, obtusish, 

 slightly exceeding the tube of the corolla : corolla a deep blue, 

 bilabiate ; the upper lip (apparently) of two oblong, erectish lobes 

 about equaling the tube ; the lower (apparently) of three obovte 

 lobes longer than the tube, somewhat depressed, with two narrow 

 yellow plicae in the throat : capsule obconical, many-seeded. 



There is little doubt that Dr. Rydbergf is justified in reestab- 

 lishing this genus, represented hitherto by but one North American 

 species, P. carnosida (Hook. & Arn.) Torr. described by Gray in 



* Bot. Gaz. 25 : 265, 266. 1898. 



f Mem. N. Y. Bot. Gar. i : 482. 1900. 



