OF AETS AND SCIENCES. 275 



^ line broad. — Collected by Dr. Gregg near the mouth of the Eio 

 Grande, in 1848 — only pistillate specimens. 



Amaranths (Euamarantus) Wrightii. Glabrous, erect and 

 slender, with ascending branches and spikes, 2 or 3 feet high or more, 

 reddish : leaves small and thin, the upper ones but an inch long, on 

 slender petioles, oblong to narrowly lanceolate : terminal compound 

 spike erect, narrow, and rather leafy : bracts solitary, subulate, 

 rigid, attenuate into a pungent awn, about 1|^' lines long: sepals ^ to 

 nearly 1 line long, oblong to oblong-spatulate, obtuse, sometimes 

 emarginate : utricle about equalling the sepals : seed orbicular, h line 

 broad. — Collected at the Copper Mines, New Mexico, by Mr. Wright 

 (n. 1748, in part), October, 1851 ; also in the Upper Arkansas Valley, 

 by Messrs. Wolf & Rothrock (n. 275) in 1873. Approaching the 

 section Amhiogyne in the characters of the calyx. 



A5IARAXTUS (Euamarantus) obovatus. Pubescent, slender, 

 erect, 2 feet high, reddish, sparingly branched: leaves small, 1 to 1^ 

 inches long, lanceolate, on short slender petioles : spikes erect, narrow, 

 the terminal ones an inch or two long, the axillary shorter : bracts 

 subulate, acuminate and pungent, 1^ to 2 lines long, much exceeding 

 the unequal narrowly oblong acute sepals : utricle equalling the calyx : 

 seeds oblong-obovate, f line long. — Also collected by Mr. Wright and 

 in the same locality, and distributed under the same number ; referred 

 in Bot. Mex. Bound, to A. hybridus. Remarkable in the shajje of the 

 seed. 



Atriplex decumbens. Decumbent or procumbent, slender and 

 branching from the base, densely hoary-scurfy, the stems becoming 

 somewhat woody below : leaves mostly opposite, oblong-ovate, sessile, 

 acute or acutish, cuneate or obtuse at base, ^ to 1 inch long or less : 

 staminate flowers in dense clusters in short interrupted terminal spikes ; 

 calyx 5-cleft: fruiting bracts coriaceous, compressed, united to above 

 the middle, triangular-cordate, acute, 2 lines long and broad, entire or 

 slightly denticulate, not herbaceously margined nor the sides muricate : 

 seed nearly a line long. — Near San Diego; Dr. E. Palmer, 1876 

 (n. 334). Allied to A. leiicophylla, Dietr. 



Corallorhiza Bigelovii. Scape stout, 6 to 15 inches high: 

 sepals and petals oblong, obtuse, about 4 lines long, twice longer 

 than the column, purple and veined (not spotted) ; lateral sepals 

 oblique and with the base of the column strongly gibbous over the 

 top of the ovary ; lip entire, fleshy, darker colored and strongly veined, 

 deeply concave, elliptical, broad and somewhat auricled at base, with 

 two thick laminae ; spur none : column rather slender, broadly margined 



