Rydbekg : Studies on the Rocky Mountain Flora 31 



long and reflexed : fruit about 4 mm. in diameter : nutlets sur- 

 rounded by a single row of subulate glochinate prickles, some- 

 what flattened at the base but not united into a wing-border : back 



of the nutlets strongly muricate. 



It is nearest related to L. occidentalis (Wats.) Greene, but dif- 

 fers in the oblong obtuse leaves, the enlarged and reflexed fruiting 



calyx-lobes, and the virgate branches. It grows in deserted fields 



at an altitude of about 2000 m. 



Colorado: Walsenburg, 1 900, Rydberg & Vreeland, 5715. 



s 



Lappula cupulata (A. Gray) 



Echinospermum Redowskii var. cupulata A. Gray, Bot. Calif. 1 : 



530. 1876. 



I think that this should be regarded as distinct from L. Texana 

 (Scheele) Britton, as the habit rs quite different. L. cupulata is 

 diffuse, branching at the base, with elongated branches, while L. 

 Texana is simple at the base, and branched above with short 



branches. 



L. Texana is a southern plant, ranging from Texas to New 

 Mexico. The range of L. cupulata is from Nevada to Nebraska, 

 south to Colorado. 



minima 



A 



high. Stems several, erect, in the specimens seen only 1-4 cm. 

 high, long hirsute : leaves spatulate or oblanceolate obtuse, hirsute 

 on both sides, 5-15 mm. long and 2-3 mm. wide : flowers crowded, 

 2.5-3 mm. long, subsessile : lobes of the calyx linear, hispid: 

 corolla white ; limb a little over 1 mm. broad ; nutlets whitish, 

 about 1 mm. long, dissimilar ; 3 ovoid, strongly muricate ; the 

 fourth somewhat larger, smooth ; the inside edge with a slender 

 groove, triangular-dilated at the base. 



In size and general habit, this species is strikingly like C. 

 pusilla ; but the fruit is different ; the nutlets being dissimilar, one 

 of them smooth, and all with rounded lateral angles and more 

 rounded backs. The specimens of our collection are rather young 

 and only two fully developed fruits were found. C. minima was 

 found on dry hillsides at an altitude of about 2200 m. 



Colorado : Cucharas River, above La Veta, 1900, Rydberg & 



Vreeland, §6gj. 



