CATALOGUE. 307 



divaricate; pedicels rigid, sometimes racemose-secund, soon deflexed, very 

 short ; involucre short-campanulate or hemispherical, about 1" long, exceed- 

 ing the pedicels, many-flowered ; bractlets bearded-ciliate, the outer broad- 

 linear, the inner filiform-spatulate ; calyx white or yellow, glabrous, very 

 obtuse at base, the outer segments orbicular, cordate at base, the inner 

 obovate, retuse, many times smaller; beak of the achenium more or 

 less scabrous. — With much the habit of the Virgata section, which it ap 

 proaches. Southeastern California, Southern Arizona, and Southern Utah, 

 (Palmer, 1870.) Virginia Mountains, "Western Nevada, and in the Wah- 

 satch at the mouth of American Fork Catton ; 5-6,000 feet altitude ; 

 August. (1,033.) 



Eeiogonum nutans, T. & G. ; I. c, p. 181. Annual, low (2-4') and 

 somewhat slender ; leaves all radical, l' in diameter, round, floccose-wooUy, 

 on long or short petioles ; panicle loose and spreading, rather simple, glab- 

 rous ; pedicels nodding, 2-3" long, very minutely viscous-glandular as well as 

 the broadly campanulate rather few-flowered (1" long) involucre ; bractlets 

 filiform, very thickly glandular ; calyx bright rose-color, becoming 1-2" long, 

 very obtuse at base, outer segments broad-oval, emarginate and almost ob- 

 cordate, the inner not half as large and a little shorter, oblong, retuse, at 

 length folded; beak of the achenium more or less scabrous. — Mud Lake 

 Valley, 20 miles north of Pyramid Lake, (Beckwith.) Unionville Valley 

 and foot-hills of the Pah-Ute range, Nevada; 5,000 feet altitude; June. 

 Plate XXXIIL Fig. L A plant; natural size. Fig. 2. A node, with bracts, 

 involucre and flowers. Fig. 3. A flower, expanded. Fig. 4. The nearly ma- 

 ture achenium; all enlarged four diameters. (1,034.) 



Eeiogonum Watsonii, T. & Gr. ; I. c, p. 182. Annual, slender, 6-12' 

 high ; leaves as in th^ last, usually subcordate ; panicle glabrous, decompound, 

 very spreading and open, loosely many-flowered ; pedicels glandless, spread- 

 ing or deflexed, 2-3 times or sometimes but httle longer than the narrow- or 

 clavate-campanulate scarcely many-flowered smooth (1' long) involucre ; 

 bractlets setaceous, sparingly glandular-barbellate ; calyx very glabrous, white 

 or pinkish, obtuse at base, the segments similar, oval, a little retuse, the inner 

 ones slightly smaller ; beak of the achenium more or less scabrous. — The very 

 effuse panicle is broader than its height, the pedicels sometimes very mi- 

 nutely and obscurely glandular, the calyx 1" long, narrower than in the last 

 but less so at base than the following. First found by Dr. Torrey in the West 



