Nelson : New Plants from Wyoming 229 



the preceding : corolla lobes elliptic, obtuse, usually emarginate, 

 8-10 mm. long, nearly half as broad; glands cup-shaped, the 

 setaceous appendages as long as the cup : filaments flat and thin, 

 their bases involved in a ring of very short, sparse, subulate setae 

 in the base of the corolla : seeds small, very numerous, irregular (?), 

 narrowly wing-margined on the angles. 



Readily distinguished from the preceding by its smaller size, 

 alternate leaves, congested inflorescence and the ring of setae in the 

 base of the corolla. 



It occurs at higher elevations than the preceding, being alpine 

 or nearly so, and in open wet grassy swales. The type no. is 7852, 

 Medicine Bow Mts., Aug. 1, 1900. 



^Phacelia Knighti 



A diminutive annual, 2-5 cm. high, minutely puberulent, 



scarcely viscid, simple or branched: leaves few (5—10?), semi- 

 fleshy, orbicular to ovate, entire or nearly so, 5-10 mm. long : 

 flowers few, subspicate and nearly sessile in the uppermost axils : 

 corolla narrowl}' campanulate, about 5 mm. long, y^ longer than 

 the linear-spatulate calyx lobes, the limb purple, the tube yellow- 

 ish, the appendages of the tube narrowly linear: seeds about 14, 

 oblong, large for the plant, conspicuously alveolate-hexagonal- 

 reticulate, slightly wing-margined by the cellular coat. 



While this species is probably nearest to P. ceplialotes Gray 

 yet it can hardly be compared with it and may be best looked 

 upon as a strictly coordinate member of that section of Phacelia 

 containing those 4 or 5 species which are peculiar to the arid in- 

 terior West. It is a vernal species following closely upon the 

 melting of the spring snows. The specimens at hand were se- 

 cured upon the absolutely naked (to all appearances) slopes of the 



Wasatch clays in Sweetwater Co., June 10, 1900 (no. 71 18). 

 The tiny plants occurred only in the cracks in the loose soil and 

 were detected by Professor W. C. Knight to whom the species is 



dedicated. 



7 



Asclepias curvipes 



Root thick and woody : stems usually several, from ascend- 



ing to nearly erect, 4-8 dm. high, simple, obscurely puberulent, 

 becoming glabrous : leaves opposite or sometimes the lowest 

 alternate, ovate-lanceolate, obtuse or acute, minutely and softly 

 pubescent on the lower face, glabrate on the upper, 7-15 cm. 

 long, short-peduncled, exceeding the short internodes : umbels 

 mostly simple, few : peduncles 3-7 cm. long, axillary from the only 



