'/"'■/'".'/"■ coMi'osnM';. 



37:5 



ciitiro pnppufl-floalp.s, wlilch rxtoii,la f,,,,,, W. A,kniisns MmoukI. S. Ufnli to S. Arizona, wlirro a 

 lonn with solitary slondnr podiinclpd licads w.us ini.stnkcii for tlio tliird or following species. 



1. R. Cooperi, (Jray. A foot or two liigh, tonicntoso-canescent ; somewhat 

 naked with age : loaves narrowly linear, entire, minutely punctate : lieads soli- 

 tary on filiform peduncles terminating the branches : akenes glabrous : jjappus of 

 oblong erose-laciniato chaffy scales, about a quarter of the length of the glandular 

 disk-corolla. — Proc. Am. Acad. vii. 358. 



Fort Mohave, on gravelly banks, Coo]m: Also on or nair the higher Rio Colorado, NcmhtrrM 

 Leaves an inch or less in length. Involucre ahout 3 lines long. Kays nearly half an inch longi 

 and about 4 hnes broad, usually four in number. Pappus irregularly lacerate-toothcd above; 

 the teeth few, sometimes slender and almost capillary. 



64. BAILEYA, Gray. 

 Head many-flowered, with 5 to 50 pistillate rays in one or more series ; all the 

 flowers fertile. Involucre hemispherical, of numerous and nearly equal thin-herba- 

 ceous linear woolly scales, about in two series. Roceptaclo flat or barely convex, 

 naked. Knys largo, oval or oblong-cuiioate, broadly 3-tootho(l at the apex, 7-norvod, 

 tapering into a narrow but not tubular base, becoming scariona-papory (but very 

 thin), persistent on the truncate ni)ox of tho akcno. Disk-corollas tubular-funnel- 

 form above the short proper tube, 5-toothed ; the teeth glandular-bearded. Anthers 

 linear, minutely sagittate at base. Style-branchos short, with truncate-cai)itate 

 apex. Akenes oblong-linear or slightly club shaped, somewhat angled, many- 

 ribbed or striate; the apex truncate, sometimes obscurely toothed by the extension 

 of the ribs, or in the ray callous-thickened. Pappus none. — Ploccosely white- 

 woolly herbs (of the Arizona-desert region), apf.ai-ently all annuals, a foot or so 

 in height ; leaves alternate, soft, the upper lanceolate or linear, the lower once or 

 twice pinnatifid ; heads of yellow flowers terminating slender peduncles, mostly 

 showy from the abundance of the persistent, at length deflexed, thin and sulphur- 

 colored rays. — Gray, PI. Fendl. 105, k Proc. Am. Acad. ix. 195. 



Thispnua, which rommomorates one of our worthiest naturalists, the. late Professor Railev 

 now claiins the placo vyhich was originally suggcstod for it, nanudy, with lUddrUia, these two 

 genera with tiio following constituting a woll-markcd subtribc. 



1. B. pauciradiata, Gray, 1. c. Slender, paniculately bnvnchcd to the summit, 

 somewhat villous as well as woolly : loaves mostly linear, tlie upper entire, tho 

 lower elongated and laciniato-pinnatifid : peduncles slender, .seldom over an inch 

 long : head small, rather few-flowered : tlio oval mys 5 or fi (sliort-unguiculate only 

 3 or 4 lines long) : the disk-flowers 10 to 20 : akenes evenly many-striate, 'rou<di 

 with minute points. 



iSoutheasteni Iwrdor of tho State, on tho Uio Colorado, in sand, (\mUrr, SrfintI, C,^,,,n: 

 2 B. ploniradiata, Gray, I. c. Wholly floccose-woolly, much bmnched fnuii 

 the base : the branches erect, terminating in mostly long solitary pedunclos : lowp.<;t 

 leaves obovate or spatulate, once or twice pinnatitid into ol)long or broadly linear 

 lobes ; the upper linear, 3-cIeft or entire : head middle-size.l and many-flowered : 

 the rays 25 to 40 in 2 or 3 ranks, dilated-obovato and broadly 3-tootiipd (4 or 5 

 hnes long) : akenes angled with .strong and .striata witli intermediate more slender 

 ribs, minutely scabrous or nearly smooth. 



California, Coulter. Not uncommon in Arizona, and througli Sonoia and Sonthorn Tt/ih to 

 the l)ordcrs of Texas : perhaps not collected witliin the State. 



3. B. multiradiata. Gray, 1. c. TVnsely floccose-woolly : .stem simple or 

 sparingly branched below, bearing long naked' or sometime.^ se.qpe-like pednnclci 



