Trarjapogon. COMPOSITiE. 415 



f. 8-10; Gray, Proc. Am. Acad. xix. 63. —Desert region, W. Xevada, Watson, Shockle</. 

 Edge of desert at San Felipe, San Uiego Co., California, Parish. 



§ 3. Hemipti'lium, Gray, 1. c, xix. 6-3. Heads 5-flowered, small: receptacle 

 naked : involucre merely calyculate : pappus of 4 to G narrow and ri-id palea; 

 (rather than awns), not longer than the akene. sparsely short-plumose toward the 

 summit, fuscous. — IleniipfAllum, Gray. Bot. Mex. Bound. 10.5, excl. spec. 



S. Schottii, Gray. Probably annual, with habit of .V. panictilata or -S'. eri;;un, plcnder : 

 loosely paniculate, 3 lines long : involucre of 4 or 5 thinnish bracts and 2 or 3 small calycu- 

 late ones : ligules barely 3 lines long : akenes less than 2 lines long, rather narrow, 4-5- 

 angled, tapering very slightly from truncate summit to lla^e, minutely scabrous between the 

 smooth aiigle-s. — Bot. Calif, i. 427. — llemiptilium Schottii, Gray, Bot. Mex. Bound. 1. c. — 

 Arizona, on the Gila River, Srhott. Not since collected. 



214. CH^TADfiLPHA, Gray. (XaiV,?, bristles, and &.Se\<l>^, sister, the 

 bristles or awns of pappus as it were o-adelphous.) — Proc. Am. Acad. ix. 218 ; 

 Rothrock in A\'lieeler Eep. 182, t. 15. — Single species. 



C. ^AT^lieeleri, Gray, 1. o. Much branched from a perennial root, flexuous and fastigiate, 

 with a.spect of Sfr-fihanomeria, or more of L'/f/''i!<--^ii,ia, a foot or two high : leaves narro^^iy 

 linear, entire, uppermost reduced to snijulate scales : heads solitary terminating the branch- 

 lets : involucre half-inch and more high, Sl)me^^hat exceeded by the pappus. — W. Xevada, 

 on the borders of Arizona, Wheeler. Xear Pyramid Lake, Lemmon. 



215. RAFINfiSQUIA, Xutt. {Constant: ae S. Rnfiaesque Sehmah. a 

 noted botanist.) — Glabrous and branching slightly succulent and S<inchu.s-like 

 winter annuals fCalifornian and Xew ilexican), leafy ; with pinnatifid li-aves, re- 

 duced on the flowering branches to herbaceous bracts: the heads rather large, 

 with showy white or rose-tinged flowers, mostly matutinal. — Xutt. Trans. Am. 

 Phil. Soc. vii. 429 ; Gray, PL Wright, ii. 103, & Bot. Calif, i. 429. 



»R. Californica, Xctt. 1. c. ifostly robust, 2 or 3 feet high, paniculately branching, bear- 

 ing numerous heads : leaves oblong (larger 4 to 6 inches long) ; cauline ]jartly clasping : 

 involucre thickened at base (half to three-fourths inch high), of 12 to 15 principal bracts and 

 some spreading calyculate ones : ligules comparatively short, white .- beak of akenes very 

 slender, as long as the body : pappus dull white. — Torr. Bot. Jlex. Bound, t. 34, figure not 

 good. — Moist or .shaded ground, common in California toward the coast ; a smaller-flowered 

 form in X. W . Arizona, Palmer. 

 R. Neo-Mexicana, Gray. A foot or less high, more slender, bearing few but larger and 

 more .^liowy heads and much smaller leaves, the lower of these often runciuate : in\<)lurre 

 narrow, more cylindraceous, sometimes inch long, little thickened at base, of fewer bracts : 

 ligules large and conspicuous (half-inch and more long), white or tinged with flesh-color : 

 beak of akene more gradually tapering, therefore stouter, rather shorter than the body : pap- 

 pus bright white, of firmer bristles, the plume somewhat arachnoid. — PI. Wright. 1. c. — 

 Sand-hills, &c., in the desert region, S. E, California to S. Utah and Xew 5Iexico on the Rio 

 Grande ; first coll. by Wriyht. 



216. TRAG-OPOG-ON, GoAt's-BEAED, SaLSIPT. (Tpayos, goat, irojymi', 

 beard.) — Old World biennials or rarely perennials, glabrous ; with long taproot ; 

 entire and grass-like nervose leaves clasping at base ; long and stout peduncles 

 commonly thickened and fistulous under the large head ; the flowers yellow or 

 purple, closing at noon or earlier. — Two species sparingly naturalized, one of 

 them cultivated. 



'T. PORRiFOr.ius, L. (Sai.sift, OrSTER-pr.ANT.) Commonly 2 or 3 feet high: peduncle 

 strongly clavate-thickened and fistulous for 2 or 3 inches beneath the head, which becomes 



