PutU. COMPOSIT-E. 361 



— Ann. Lvc X. Y. ii. 214; Grav, PI. FendL 61, PI. Wright, i.82, & Bot. Mex. Bound. I.e. 

 P. r'liitigiata, Grav, PI. Fendl. 1. c. PectiJopsis angustifoUa, DC. 1. c. ; Torr. & Grav, i'\. ii. 

 62. — Dry hills and plains, Texas to Colorado and Arizona; tir.st coll. b_v James. (AJj. Mex.) 



•i— -i— Heads scattered or solitary, on filiform (one or two inches long) peduncles terminating 

 fttni and ditfuse branches : iuvolucral bracts obtuse, at length more or less infolding rav-akeue^ : 

 plants a ^pan or two high: leaves shorter than or equalling the internode-. an inch or two long. 



P. filipes, Gray. Lemon-scented, at length much branched : leaves narrowly linear : invo- 

 lucre narrow, of 5 narrowlv oblong bracts : ligules 2 lines long : pappus both in disk and raj- 

 flowers of i or 3 (rarely one) rigid snl)ulate awu^. shorter than or equalling disk-corolla, with 

 thickened bases and usually very short and blunt interposed scjnamella», sometimes all cori> 

 niform-concreted, or some disk-flowers destitute of pappus. — PI. FLudl. (rl. & PI. Wright, ii. 

 69. P. Jatiscana, Hemsl. Bot. Biol. C'tntr.-Am. in part, not of Huok. & -\ru. (as Taliscana) 

 as was supposed. — Common from S. W. Arizona (probably not California) to S. W. Texas ; 

 tirst coU. by Coulter. 



P. Rusbyi, Greexe, in herb. "Mint-scented"- leaves linear, thickish : involucre campan- 

 ulate, of 7 to 9 oblong very obtuse bracts : ligules 3 lines long : pappus in ray-flowers of 

 two or more slender awns : in disk-flowers a conspicuous crown of numerous setaceous- 

 pointed squameUte more or less concreted at base : flowers more numerous than in the pre- 

 ceding. — Beaver Creek, X. Arizona, Ilusbi^. 



§ 2. Pectothrix. Pappus of numerous capillary bristles (at least in most of 

 the disk-flowers) and no palea;. — • Gray, 1. c. 



* Pappus barbellate-setose, uniserial, but occasionallv reduced to a c^o^^■n of squamellae: annual. 

 -P. papposa, Gk.w. a span to a foot high, difinsely or divaricately much branched from 



the base: leaves very narrowly linear, elongated (the larger 2 inches long, barely a line 

 wide), verv few bristles at their base : peduncles once to thrice the length of the lieail- : 

 inTolucre of 7 to 9 linear bracts : akenes sparsely hispidulous with short capitate bristles : 

 pappus shorter than the disk-corolla, normally of 12 to IS unequal capillary bristles, which 

 are stronglv but rather sparsely barbeUate, sometimes (especially in the ray) reduced to a 

 setvilcise or squameDate crown, or quite obsolete. — PI. Fendl. 62: PI. Wright ii. 69. P. 

 teneUa, Eothrock in Wheeler Rep. vi. 171 , not DC— S. California, Arizona, Utah, and Xew 

 Jlexico : first coll. by Coulter. 



* * Pappus of merely scabrous capillary bristles, with shorter outer ones more or less in a sepa- 

 rate series : ours perennial. 



P. longipes, Gray. Low and much branched from a perennial root, forming spreading or 

 depressed tufts: leaves crowded, linear, conspicu.iusly setiferous at liaje: peduncles elon- 

 gated, often scape-like, 3 or 4 inches long: involucre campanulate, 3 lines high, many- 

 flowered, of 12 or 13 linear bracts : rays as many, 3 or 4 lines long : p;ippus of the ray- 

 flowers setosely 2-aristate : of the diskmultisetose, i. e. of 20 or 30 upwardly denticulate 

 capiUarr bristles, the longer equalling disk-coroUa, and of some small more attenuate outer 

 ones. — PI. Wright, ii. 70; Eothrock^ 1. c, but root not annual. — S. Arizona; first coll. by 

 Wri.iht, ThHrl.,-" &c. 



§ 3. Pectidium. Pappus when developed of few (1 to 4 or 'jt subulate and 

 rigid mostly corneous and persistent awns, or reduced to a crown or vestige in 

 scime flowers. — § Fectidium & Heteropectis, Gray. PL Wright, i. .^3. 



* Diffuse low annuals, puberulent, with setiferous leaves : corneous divergent awns of the pappus 

 retrorsely barbed, m the way of Bklens. —Heteropectis, Gray, 1. c. 



P Coulteri Geay. a span or less high, very diffuse, slender: leaNes narrowly linear, 

 setiferous merely at base, onlv half-inch hmg : peduncles twice or thrice the lengtli of the 

 head- involncre"cvlindraceous, 2 lines high, 10-20-flowered, of 5 linear-uldoug bracts : serru- 

 late-hispid awns of the pappus 3 or 4 in the ray, 2 or 3 in the disk. — PI. Fendl. 62. —Ari- 

 zona (probably not California), Coulter, Pulmer. 

 P MrLTisETi Benth. Bot. Sulph. 20 (Lower California, Hinds, Xintvs\ is larger, with 



broader and serrulate leaves, all the t€eth and the apex bristle-tipped ; outer akenes with 2 or 3 



retrorsely hispid awns ; iimer with a single awn and a short cro\yn. 



