CATALOGUE. 77 



herbaceous, much branched, 5° high ; stem smooth ; stipules falling away- 

 very early ; leaves deeply 3-parted, with the divisions lanceolate, tapering 

 into a long point; bracts three times as long as the truncate cyathiform calyx ; 

 petals very delicate rose color, 1/ long, obovate, woolly at the base on- mar- 

 gins; style longer than the stamineal column. Young branches, petioles, 

 leaves, and flowers sprinkled abundantly with black dots. (G98.) Sanoita 



Valley, Southern Arizona.* 



STERCULIACE^E.t 



AyeniaJ pusilla, L., var. ramis erectis, foliis siiperioribus lanceolatis, 

 Gray (PL "Wright. 1, p. 24). — Perennial, with many thin, wiry stems from 

 the thick, woody root ; lower leaves ovate and somewhat irregularly serrate, 

 upper ones irregularly serrate, twice as long, and lanceolate ; flowers small, 

 on reflexed, filiform pedicels, which are 2-4" long ; capsule tuberculated 

 and hairy. I would call attention to the fact observed by Dr. Gray (PL 

 Wright. 2, p. 24), that the anthers are trilocular. Judging from the state- 

 ment in Bentham and Hooker, Gen. Plant, vol. 1, p. 225, this would also 

 appear to be the usual rule in the genus. My specimens (569) from South- 

 ern Arizona correspond exactly with those obtained by Dr. Thurber at Van 

 Horn's Wells, in what was then Sonora. 



LINEiE. 

 Linum rigidum, Pursh, var. piiberulum, Gray (PL Wright. 1, p. 25). — 

 Low, 2'-4' high, annual, branching from near the base; stems decidedly 

 puberulent, leaves less so ; leaves slightly imbricated, 3-6" wide, lower 

 obtuse, upper slightly mucronate; vein inconspicuous ; pedicel very slightly 

 thickened at the top (not, however, forming a cupule) ; sepals acute, 

 mucronate, glandular hispid on the margin ; central vein prominent, and on 

 outer (sepals) the lateral ones inconspicuous, a little longer (3-4" long) 

 than the mature capsule (sepals about equal in length to the nearly undi- 



* See Bentham aud Hooker, Gen. PI. 1, p. 982. 



t Sterculiace^e differ from Malvaceae by having 2-eelled anthers, aud from Tiliace^e by the 

 stamens, when definite in number, being alternate with the sepals, i. c, opposite to the petals, or when 

 indefiuifce, united more or less at tho base into a column. 



JAyenia, L. — "Involucel none. Calyx 5-parted. Petals ou long capillary claws, connivent 

 over the stigma. Fertile stamens 5, alteruating with 1-2-sterile ones, their filaments united into a pedi- 

 cellate cup. Style single. Stigma 5-augled. Capsule 5-lobed, 5-celled, loculicidally 5-valved, the cells 

 1-seeded. — Low shrubby plants, with minute axillary flowers. Capsule rough. Albumen none."— Our- 

 man, Flora of Southern U. S. p. 59. 



