CATALOGUE. 313 



fornia, Arizona, and New Mexico. With the last, and also near Humboldt 

 Lake, Western Nevada ; May. (1,045.) 



Choeizanthe Watsoni, T. & G. ; /. c, p. 199. Small, annual, hoary- 

 pubescent, the at length sub-cymosely branched stem 1-3' high; leaves 2-8" 

 long, 1" wide, narrowly spatulate or lanceolate, petioled, acutish, pointless, 

 entire ; involucres somewhat scattered, panicled, coriaceous, the 5 teeth not 

 margined, very unequal and, like the small acerose-subulate bracts, termin- 

 ating in a recurved cusp, one (rarely 2) larger or broad and leafy, often 

 nearly equaling the smooth cylindric (lJ-2J"long) tube, the rest subulate 

 and small ; flower included, on a slender pedicel ; tube of the yellow 6-lobed 

 calyx cylindric, the lobes slightly pubescent, acute ; stamens 9, inserted on 

 the throat, the filaments and anthers short ; seed linear-subulate ; embryo 

 straight ; cotyledons linear, longer than the radicle. — Collected by Dr. Torrey 

 and Stretch, in Western Nevada. Rather frequent on the dry wash of the 

 foot-hills from the Humboldt to Reese River ; May-July. Plate XXXIV. 

 Fig. 4. A plant ; natural size. Fig. 5. Involucre, laid open, and flower ; 

 enlarged four diameters. Fig. 6. Flower, laid open ; enlarged twelve diame- 

 ters. (1,046.) 



Oxteia digyna, Campd. White Mountains of New Hampshire, Labra- 

 dor, and Greenland, and on the Arctic Coast to Behring Strait ; Unalaska, 

 and southward in the mountains to Colorado and California. East Humboldt, 

 Clover, Wahsatch and Uinta Mountains; 8,500-11,000 feet altitude, in the 

 moist crevices of shaded rocks ; July-September. (1,047.) 



RuMEX VENOSUS, Pursh. DC.Prodr. 14. 43. Stem branched, 1° high; 

 leaves thick, flat, glabrous, petioled, the lowest ovate-subcordate at base, the 

 rest ovate-lanceolate or oblong, acute, attenuate at base ; panicle leafy only 

 at base ; raceme axillary and terminal, solitary, simple, sessile, the fascicles 

 3-8-flowered ; flowers perfect, on capillary pedicels, jointed at the base and 

 equahng the valves ; valves equal, orbicular, deeply cordate, entire, closely 

 reticulate-veined, destitute of callus, becoming greatly dilated. — Leaves often 

 4' long and 14-2' wide, on rather short petioles ; valves bright rose-color at 

 maturity, 9-12" in diameter; outer sepals finally deflexed, about equaling the 

 sinus of the valves. From the Saskatchewan to the Columbia and southward 

 to New Mexico and California. Foot-hills of the West Humboldt and Pah- 

 Ute Mountains, Nevada; 5,000 feet altitude; May, June. (1,048.) 

 40 



