40 



in a small and compact cluster, in fruit the umbels are somewhat 

 unilateral by the upper rays being louger (4-7 mm.) than the low- 

 er, all fleshy and thick. Involucre none. Involucels of about 5 

 nearly distinct purple bractlets, 3-4 mm. long, oblanceolate and 

 acute, with narrow hyaline margin. Fruit from nearly sessile to 

 shortly-pediceled, about 6 mm. long and 4 mm. wide from the out- 

 side of the wings the outline being cylindrical to oval and emar- 

 ginate at each end; body of seed flat though slightly concave on 

 the inner face, narrowly elliptical and acute at both ends, about \ 

 mm. thick and 1.5 mm. wide, with 2 oil tubes on the commissure 

 and about 1 in the intervals. Wings greatly crimped, veiy cellular- 

 corky, about 1.5 mm. wide to the end of the seed, all about equal 

 or one or two of the dorsal ones very thin but wide, the cross sec- 

 tion being lanceolate from the base which is about as wide as the 

 seed (^ mm.) and the tip a knife edge. This differs from the spe- 

 cies in being much more condensed, the fruit forming a compact 

 head, rays few and very short, in the entire bractlets not acumi- 

 nate nor toothed, and in the much less dissected and smaller leaf. 

 It differs from the var. Coulteri in the few and very short rays 

 and still less dissected and smaller leaves. It grows on rocky me- 

 sas or high ridges in the Lower Temperate Life Zone near Sevier 

 Bridge Utah, about 5 miles from the type locality of the var. Coul- 

 teri, in sandy or gravelly soil along with C. longipes. May 26 1910. 

 This trip was a special one to re-collect the var. Coulteri which 

 grew on clay slopes, but it was not found though many of this var. 

 were. 



Arabia sabuloia n. sp. 

 Strict biennial, 1-2 ft. high. Whole plant hoary with compact- 

 ly and pectinately divided and appressed hairs. Root leaves many, 

 rosulate, oblanceolate, mostly with a few coarse teeth, 1.5-4 cm. 

 long, 8-4 ram. wide. Stem leaves densely imbricated so as to con- 

 ceal the stem, sagittate, oblong-lanceolate, acute, entire or the 

 lower with a few teeth, 6-15 mm. wide, appressed. Inflorescence 

 mostly panicled and with the central raceme twice longer and ses- 

 sile. Pods 6-7 cm. long, 2 mm- wide, flat, many- veined, obtuse at 

 both ends, a little arcuate, appressed and reflexed with the pedi- 

 cels also closely reflexed and in fruit about 4 mm. long. Seeds ap- 

 pearing as if in one row. Flowers 8-10 mm. long, white or whitish 

 and with pink sepals, reflexed. Peta§ spatulate to oblanceolate, 

 with the claws about twice the sepals which are narrowly ellipti- 

 cal often and with narrow hyaline margins. Plants many-flowered. 

 Sagebrush plains from Palisade to Cobre Nevada, Lower Temper- 

 ate Life Zone. 



