﻿Wooton : New Plants from New Mexico 259 



is difficult to separate it without the best of dried material. The 



characters which are of most importance are its size and habit, and 



thinner darker green foliage, the cauline leaves being much broader 



and the pinnatifid leaves being more numerous and not wholly 



basal. Normally it grows in rather heavy soil producing erect 



simple stems 5-8 dm. to the first branch. Plants of the first year 



produce but a single stem and might easily be taken for annuals. 



In the Organ Mountains old plants are quite frequently found 



growing in cracks in vertical cliffs, and in these situations the stems 



grow out at all angles and curve upward. I have seen well grown 



plants of this kind forming hemispherical masses of green and 



white a meter in diameter upon the face of a perpendicular rocky 

 wall. 



Lepidium Thurberl 



Annual (?) corymbosely much branched from near the base up 

 the stout central erect stem, 3—4 dm. high ; stems and leaves villous- 

 hirsute with coarse white hairs, which are very numerous upon 

 the young parts : leaves all pinnatified, segments ovate to oblong- 

 elliptic, acute, entire or variously toothed in the lower leaves : in- 

 florescence of numerous corymbosely arranged many-flowered 

 racemes, 2 dm. or less long ; flowers bright white, crowded at the 

 top of the rachis ; pedicels in fruit 5 mm. long, ascending : sepals 

 ovate, concave, 1.5 mm. long, glabrous, green with white margin : 

 petals elliptical, 2-3 mm. long, short-clawed : stamens tetrad) na- 

 mous, filaments subulate, 2-3 mm. long, anthers elliptical: pod 

 elliptical to rotund, glabrous, emarginate, tipped by the scarcely 

 I mm. long style. 



Collected at Lava, June 11, while passing through on the 

 train. No. 672. 



Alt. 4200 ft.? 



First collected by Dr. Geo. Thurber, at the copper mines, near 



What is now Silver City, in 185 I (no. 323), for whom it is here 



named. Also collected by Dr. H. H. Rusby, near Prescott, 



Ariz., May 18, 1883, and by Dr. T. E. Wilcox, at Fort Huachuca, 

 Oct. 189 



This plant has until now been included in L. montanum Xutt. 

 which is caespitqse, "nearly glabrous, decumbent" and has its up- 

 per 1. ives entire and comes from the extreme northwestern part 



of the United States. 



