﻿Western North America 199 



shorter, and the petals narrower, not notched, and of a different 

 shape. The leaves also are of a more coriaceous texture. 



Mentzelia parvi flora. 



Annual ; stems weak, ascending, about 4 dm. high when 

 mature, branching throughout, whitish, shining, sparsely pubescent 

 with short, spreading hairs, or merely glandular puberulent below, 

 leafy, especially above : leaves sessile, the lower oblong, 3-5 cm. 

 long, 5 mm. or slightly more in width, rounded or acutish, the 

 upper ones lanceolate, acute, 2—3 cm. long, less deeply lobed, or 

 some entire, one nerved : flowers axillary, sessile, the lower ones 

 solitary, those higher up often in pairs, and the terminal ones in 

 threes, of these the lateral ones on short branches, thus forming a 

 corymbose cluster, but each individual flower sessile, and sub- 

 tended by reduced leaves, except the middle one, which is naked ; 

 calyx-tube cylindrical, 1.5 cm. long when fully developed, 2 mm. 

 in diameter, pubescent with spreading hairs, which are longer and 

 » more plentiful than those on the stems ; lobes of the calyx linear- 

 lanceolate, 2 mm. long, pale ; corolla expanding in sunshine, pale 

 yellow, spreading, the lobes broadly obovate-spatulate, slightly 

 more than 3 mm. long, and 2 mm. wide at the top, emarginate, 

 veined ; stamens shorter than the petals, the filaments all filiform : 

 seeds about 30, in a single series on each placenta, slightly tuber- 

 culate scabrous, more or less cubical. 



The type is no. 3750, collected eleven miles southeast of Santa 



Fe, New Mexico, on the road leading to Canoncito, June 23, 1897, 



at an elevation of about 7200 feet. The specimens were growing 



near the roadside, in a day ravine, where they were partly shaded 



by bushes. Young plants were more simple, and less weak than 



the older ones, which often grew in clusters, and were somewhat 



interlaced. In a general way this species is related to M. albicaulis, 



and specimens of it may exist in herbaria under that name, but the 



flowers are much smaller, in addition to various other differences. 



Boisduvalia parviflora. 



Small, barely 15 cm. high, branching below, the branches 

 spreading, whole plant pubescent, the hairs white, spreading ; 

 lower parts of stem and branches yellowish, and not so densely 

 pubescent as the upper, leafy throughout : leaves lanceolate, the 

 longest about 2.5 cm. long, somewhat narrowed at the sessile base, 



A jA ^fc -a 41 



sparing 



tipped with a very 



