CATALOGUE. 245 



gated, weak and slender ; leaves ^-1' long, oblong or oblong-linear ; racemes 

 terminal, short, usually bractless ; flowers almost sessile ; calyx-lobes linear 

 becoming much elongated, often very hispid; corolla white, minute, (less 

 than 1" long,) throat somewhat gibbous or scarcely so ; nutlets oblong- or 

 ovate-triangular, 1" long, perfectly glabrous and shining, rather flattened upon 

 the back, the internal angle sulcate and attached nearly its whole length to 

 the short style ; calyx, with the fruit, often deciduous. — Closely allied to the 

 last, but larger and much more loosely branched, and especially marked by 

 its bractless and rarely at all capitate racemes. It varies much in the size 

 and development and hairiness of the calyx, and apparently also in the promi- 

 nence of the protuberances in the throat of the corolla. Early specimens 

 with a short calyx (857) and the maturer form with the calyx well-developed 

 (858) show wide extremes. E. muriculatum, Torr., Bot. Wilkes's Exped., 

 ined., 1. 13., (not of DC.,) is apparently in every respect the same thing, even to 

 the deciduous calyx, except that the nutlets are very minutely granulated, 

 with coarser scattered tubercles. The fruit of the present specimens shows 

 under the microscope a very obscurely granulated surface, so that the differ- 

 ence is probably not constant. Southern California to Washington Territory. 

 On the foot-hills and mountains from Western Nevada to the Wahsatch ; 

 4-7,000 feet altitude ; May-August. 



Eeitrichium pteeocaeyum, Torr. Bot. Wilkes's Expl. Exped., ined., t. 

 13. Annual, 4'-l° in height, hirsute with spreading hairs, erect, branched ; 

 leaves linear or narrowly oblong, h-li' long ; racemes terminal, usually bifur- 

 cate ; flowers nearly sessile, rather crowded ; calyx-lobes 1 J-2" long, ovate 

 or oblong, acute, densely hirsute with short yellow hairs ; corolla white, 

 small, the tube about equaling the calyx, with minute appendages ; nutlets 

 broadly ovate with a wide membranous irregularly crenate wing, or one of 

 the nutlets oblong and wingless, strongly tuberculate upon the back and with 

 a deep ventral groove, attached to the style the whole length. — A remarkable 

 species with the wing of the fruit as broad as the body. Oregon, Northern 

 Arizona, New Mexico, and Western Texas. Frequent on the foot-hills of the 

 Washoe and Trinity Mountains, Nevada, and also found on Stansbury Island 

 in Salt Lake ; May, June. (859.) 



EcHiNOSPEEMUM DEFLEXUM, Lehm. DC. Prodf. 10. 135. Biennial; 

 stem erect, terete, fistulous, branched, villous with spreading hairs ; leaves 

 oblong-lanceolate, rather obtuse, ciliate at base, hirsute-pubescent ; racemes 



