gravel in the Tropical Life Zone. 



i\ weak and erect annual, much branched and stems tortu- 

 (His but not climbing; racemes long and loose; lowest leaves 

 ]-3 inches long with simple and linear lobes and petioled, the 

 rest linear and entire ; the whole plant except the very base is 

 a loose inflorescence with straggling racemes; flowers min- 

 ute, purplish-while. 1 line long, calyx ashv and equaled by the 

 slender and indifferently spreading pedicel which in fruit 

 elongates to 2 lines long; pods 6-9 lines long, acute at each end, 

 i'.rcuate, torulose. 1-2 lines wide, apex very blunt; whole plant 

 nearly smooth. This has undoubtedly been mistaken for Strep- 



Thelypodium Diehlii n. sp. 



Stout, erect, robust, and thick-stemmed, branched above, 

 2 feet high or more, glaucous and smooth ; lower cauline leaves 

 4-5 inches long, oblong, entire, acute, auriculate-clasping, con- 

 gested, and thick; racemes sessile, 2-4 inches long, densely 

 flowered, stout, erect; pedicels slender, divaricate, 4 lines long; 

 pods erect, sessile, 1 inch long; style )^ line long, stout, tipped 

 by 2-lobed stigmas; flowers 2 lines long, white; anthers nar- 

 rowly oblong, sagittate ; biennial or perennial. Mound Valley 

 Sierra Madre Mts., Chihuahua, Mex., 7,000 feet alt.. Sept. 18, 

 1903, in meadows in the Middle Temperate Life Zone, 

 Diehl, This corresponds well with the figure of T. Vaseyi. pub- 

 lished by Coulter as to leaves and flowering branches with the 

 immature pods which Robinson refers to Sisymibrium. but not 

 to the fruiting branch w^hich is different. As to whether the 

 flowering branch is a Sisymbrium (linifolium) the writer has 

 no opinion but this species cannot be a Sisymbrium. 



Thelypodium longifolium var. Catalinense n. var. Pods 

 erect. 18-24 lines long, on pedicels about 4 lines long. Catalina 

 and Santa Rita Mts., Arizona, Aug., 1903. T. longifolium often 

 his the fihform pods 3 inches long; the pedicels are about 1 

 inch long and capillary, ascending below and hooked above; 

 the leaves have stellate hairs with a very stout foot arising 

 from a seemingly pustulate base which 'when dry leaves a 

 large rough spot around the hair. This is probablv true of T. 

 micranthum also, but the hairs are so thickly set that the sur- 

 face of the leaves is rugose. 



Lesquerella Cusickii n. sp. 



Annual, prostrate with many slender stems ; root leaves 

 with the blade 5-8 lines long, neariv reniform and abrun.Iv 



