﻿378 Nelson : New Plants from Wyoming 



usually a few of them showing slight serrations, triple -nerved, but 

 the lateral ones often incomplete or obscure : heads about 5 mm. 

 high, very numerous, closely fastigiate-glomerate : bracts of the 

 involucre oblong, subacute or obtuse, thin-margined, greenish 

 down the middle: rays small, 5-9: disk-flowers 10-15: achene 

 cylindrical, pubescent, obscurely nerved, more than half the 

 length of the pappus. 



Its affinities are not clear, but it is probably nearest to the S. 

 Missouricnsis group. It is sub-alpine in habitat, occupying abrupt 

 slopes in partly wooded stations. 



Type specimen in Herb. Univ. of Wyoming, no. 2632, Lake 

 Creek, Medicine Bow Mountains, August 13, 1896. Also from 

 Dome Lake, Big Horn Mountains, July 17, 1896, no. 2381. 



Soli dago diffusa. 



Perennial from a tufted mass of rootstocks, diffusely spreading, 

 the whole forming a rounded mass of golden yellow 1 m. or more 

 across ; closely cinereous-puberulent throughout except as to the 

 heads ; stems very numerous, virgate, 6-8 dm. long, striate, florifer- 

 ous for nearly one-half their length; lower stem leaves very narrowly 

 oblanceolate, obscurely 3 -nerved, entire, 6-12 cm. long: leaves 

 gradually reduced in size upward on the stem ; upper leaves ob- 

 long, those of the long, virgate, secund inflorescence regularly re- 

 duced but leaf-like except at the summit where they become mere 

 bracts : panicle narrow, racemose, 2-4 dm. long, its short crowded 

 branches scorpioid : heads about 6 mm. high : bracts of the invo 

 lucre oblong-elliptic, obtuse, glabrous, greenish with thin colorless 

 margins : rays usually 5, small spatulate : disk-flowers 10 or fewer: 

 achene closely puberulent, cylindrical. 



It is seemingly quite local as nothing approaching it has been 

 secured in several years' collecting in the state.* A number of 

 , fine clumps of it were observed in the eastern end of th< 

 canon of the Platte where that stream finds it way through the 

 Laramie Hills range. Badger, August 27, 1896, no. 2761- 

 Type specimen in Herb. Univ. of Wyoming. 



Picradexia ligulaeflora. 



* Hymenopapfms ligidaeflorus A. Nelson., First Rep. Fl. Wyo- 



135. May, 1896. 



very 



— — . ■ „ 



Dr. Rydberg suggests that this is the S. nemoralis of most of the W< - rn 

 ports and states that its range extends from Kansas to the Saskatchewan. It »* ^ xeX) 

 different from the eastern S. ncmoralis that I had not a-ociated the two at all. 



