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. (698.) Sanoita 

 Valley, Southern Arizona.* 



STERCULIACE^E.f 



AyeniaJ pusilla, L., var. ramis erectis, foliis superioribus hniceolatis, 

 Gray (PI. 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 (PI. 

 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. 



LINE^E. 

 Linum rigidum, Pursh, var. puberulum, Gray (PI. 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 Sterculiacejg differ from Malvacejs by having 2-celled anthers, and from Tiliace-e: by the 

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

 indefinite, united more or less at the base into a column. 



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

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

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

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

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



