CATALOGUE. 241 



stamens with very short filaments, inserted upon the middle of the tube ; nut- 

 lets very nearly smooth upon the back. — Beautifully figured in the unpub- 

 Hshed plates of the Wilkes's Exploring Expedition. Collected by Tolmie 

 and Burke in Southern Idaho and by Stansbury in Southwestern Wyoming. 

 It is also 376 Fremont, from the Mohave Valley, Southern Cahfornia, and 162 

 Anderson and 332 and 336 Torrey, from Western Nevada. On the Pah-Ute 

 Mountains, Nevada, and on the shore of Antelope Island, Utah ; June. (847.) 



Var. Stems 2-5, erect and simple, i-2' high. Probably only an early 

 form of the species. Found near Carson City, Nevada; April. (848.) 



Eeiteichium^ villosum, DC. Prodr. 10. 126. Stems 3-6' high, loosely 

 branched .at base and caespitose, rooting below, the flowering shoots elonga- 

 ted, leafy, erect, pubescent ; leaves elliptic-oblong, acute, sparingly villous 

 with long silky hairs, racemes in pairs, erect, several-flowered, bracteate at 

 base ; nutlets truncate upon the back, which is surrounded by a margin of 

 inflexed cihate-serrate teeth. Var. aeetioides. Hook. Dwarf, 3"-2' high, 

 densely csespitose and covered with soft silky hairs ; lower leaves crowded, 

 cauline few ; tube of corolla scarcely exceeding the calyx, limb bright blue, 

 1-3" in diameter ; nutlets nearly 1" in length, concave upon the back, the 

 toothed margin conspicuous. — Probably biennial. Eocky Mountains of Colo- 

 rado. Uinta Mountains, Utah ; 12,000 feet altitude ; August ; the flowers 

 considerably smaller than is usual in the Colorado specimens. (849.) 



Eeiteichium angustipolium, Torr. Pac. R. R. 8urv. 5. 363. {Wil- 

 liansorHs Rep.) Annual, very hispid with mostly spreading hairs ; stem 3'-l° 

 high, suberect, branched ; leaves linear or narrowly oblong, obtuse ; racemes 

 terminating the branches, usually bifurcated and at length elongated, fre- 

 quently short and subcapitate ; flowers sessile, bractless ; calyx (2-3" long in 

 fruit) very hispid with yellowish hairs, the lobes narrowly linear; corolla 

 white, 5-1" long, the stamens inserted near the base on very short filaments ; 

 nutlets (1-4) oblong, acute, nearly 1" long, convex and very minutely granu- 

 lated upon the back, attached to the style to the middle by a ventral groove. — ■ 



1 EEITEICHIUM, Schead. Calyx 5-parted. Corolla salverform, the tlrroat closed by small 

 obtuse scales. Stamens and style included. Kutlets 4, attached laterally, (usually) near the base, the 

 surface of insertion very narrow, imperforate at base, flat (or convex) anteriorly, the angles smooth or 

 rarely crenate. — Mostly annual, with entire and commonly alternate leaves, the usually very small blue 

 or white flowers in lateral or axillary spicate racemes. Differing from Myosotis in the quincuncial aesti- 

 vation of the corolla and the more or less lateral insertion of the nutlets, which are also usually rugose 

 or granulate upon the back, and from Mchinoapermum in the attachment of the nutlets (in most cases) not 

 extending above the middle of the style, the nutlets not dilated below, prickles rare and not barbed, and 

 the attachment of the seed ventral and not at the apex. DeCandollb, Prodromm, 



31 



