﻿i 9 i6] NELSON 6- MACBRIDE— WESTERN PLANTS 37 



Nutlets 4-7 mm. long, the median tuberculations more prominent than 

 the outer 



Plant not bushy branched, ashy pubescent; nutlets 4~4-75 rnm. long 



Plant bushy branched; herbage green; nutlets 6-7 mm. long 

 - /. 



Prickles in one row 4. L. Redowskii, 40, and 46. 



Nutlets, at least in part, cupulate 



Cup shallow, the prickles united toward the base and forming a spreading 

 flange, scarcely or not at all inflated; nutlets all alike 



Pubescence rather soft, little papillose; stems branched above 



5. L. cupulata 



Pubescence harsher, more papillose; stems branched from the base 



$a. var. foliosa 



Cup deep, the inflated margin more or less involute; nutlets frequently 

 dissimilar 



Stems branched above; pubescence soft; nutlets dissimilar, strongly 



tuberculate on sides and face 6. L. texana 



Stems branched and floriferous from the base 



Nutlets dissimilar 60. var. heterosperma 



Nutlets similar 



Faces and sides tuberculate 66. var. homosperma 



Faces and sides smooth 6c. var. coronata 



1. Lappula echinata Gilib. Fl. Lith. 1:25. 1781: L. Lappula 

 (L.) Karst. Deutsch. Fl. 979. 1880- 1883 .—This widely naturalized 

 species has the prickles of the nutlets quite distinct to the base and 

 in two very evident marginal rows. 



2. Lappula Fremontii (Torr.) Greene, Pitt. 4:96. 1899.— 

 L. erecta A. Nels. Bull. Torr. Bot. Club 27:268. 1900 as to speci- 

 mens cited and description in large part. — This was described as 

 having the prickles of the nutlets in a single row. Since they are 

 in two irregular rows in authentic specimens this must have been 

 an oversight. Part, at least, of the original collection of L. Fre- 

 montii is deposited at the Gray Herbarium, and L. erecta is clearly 

 a synonym. The species is a good one. It is distinguished from 

 L. Redowskii by the double row of prickles and from L. echinata 

 (its nearest relative) by the distinctly larger nutlets, the more 

 irregular distribution of the prickles, and the tendency of the 

 median tuberculations to become more prominent, differences 

 well noted by Torrey in his original diagnosis (Pacif. R.R. Rep. 

 12:46. i860). 



