114 COMPOSITE. Trilisia. 



Willd. Spec. iii. 1637; Michx. Fl. ii. 93; Andr. Bot. Rep. t. 633; Don in Brit. Fl. Gard. 

 ser. 2, t. 184; Torr. & Gray, Fl. ii. 76. Eupatarium glastifolium, Bertol. Misc. v. 16, t. 4. 

 Low pine barrens, near the coast, Virginia 1 to Florida and Louisiana. 



T. paniculata, CASS. 1. c. Viscid-pubescent or the foliage glabrate, a foot or two high : 

 leaves smaller, green ; radical lanceolate-spatulate ; small cauline ones oblong-lanceolate : 

 cymules short-ped uncled, crowded in a narrow panicle or thyrsus: akeues minutely pubes- 

 cent. Anonymos paniculatus, Walt. 1. c. Liutris paniculata, Michx. Fl. ii. 93; Willd. Spec, 

 iii. 1637; Torr. & Gray, Fl. ii. 76. Damp pine barrens, Virginia to Florida, near the 

 coast. 



TRIBE III. ASTEROIDE^E, p. 52. 



19. G-YMNOSPERMA, Less, (Fu/wos, naked, a-n-^a, seed, having no 

 pappus.) Perennial herbaceous or suffrutescent plants, erect, glabrous, mostly 

 glutinous ; with alternate entire narrow leaves, and small heads of yellow flowers 

 in fastigiately corymbose glomerate cymes. Involucre about 2 lines long: ligules 

 very small and short. Syn. 194 ; DC. Prodr. v. 312, excl. 2. Founded on 

 Selloa glutinosa, Spreng., said to come from S. Brazil, with infertile disk-flowers, 

 to which DeCandolle added three Mexican species ; but these are all reducible 

 to one, viz. : 



G. COrymbosum, DC. Woody at base, 2 or 3 feet high : leaves from oblong-lanceolate 

 to linear; lower ones distinctly 3-nerved : flowers of the ray 5 to 9, of the disk mostly fewer, 

 all fertile. Torr. Gray, Fl. ii. 192; Gray, PI. Wright, ii. 94. G. canjmbosum, multiflorum, 

 & scoparium, DC. 1. c. Rocky soil, S. Texas; fl. autumn. (Mex.) 



20. XANTHOCEPHALUM, Willd. (Eavflo'j, yellow, and K 0aAi 

 head.) Herbaceous or suffruticose plants (chiefly Mexican) ; with alternate 

 entire or lobed leaves, and yellow flowers in scattered or loosely cymose heads ; 

 the smaller-flowered species approaching the following genus. -- Willd. in Gesel. 

 Nat. Fr. Berl. 1807, 140; Benth. & Hook. Gen. ii. 249. Xanthocoma, HBK. 

 Nov. Gen. & Spec. iv. 310, t. 412; DC. Prodr. v. 311. 



X. SERicocARPUM, Gray, Proc. Am. Acad. xv. 31, from San Luis Potosi, Mexico, has ca- 

 nescent akenes : in all other species they are glabrous or only sparsely pubescent. Our species 

 are annuals. 



X. "Wrightii, GRAY. Very glabrous, not glutinous : stems slender, a foot or two high, 

 corymbosely paniculate at summit : leaves linear, entire : heads rather numerous, terminating 

 pedunculiform branchlets : involucre barely 3 lines high and wide ; the bracts broad, obtuse, 

 or apiculate with a short green tip : rays 12, oblong : style-appendages linear-lanceolate, acute : 

 akeues all surmounted by an entire or obscurely denticulate corouiform border, without 

 proper pappus. Proc. Am. Acad. viii. 632. Gutierrezia Wrightii, Gray, PI. Wright, ii. 78. 

 S. Arizona and New Mexico, Wright, Thurber, Bit/slow, Greene. 



X. gymnospermoides, BENTH. & HOOK. 1. c. Glutinous when young, occasionally with 

 some deciduous tomentum : stem stout, 2 to 4 feet high : leaves oblong-lanceolate with a 

 tapering base, sometimes sparingly denticulate ; the lowest often broader, petioled, occa- 

 sionally incised and even pinnatifid : heads corymbosely cymose, crowded : involucre hemi- 

 spherical, 4 lines high, very many-flowered ; the bracts narrow and with acute green tip?-, 

 not very unequal : flowers deep golden-yellow : rays 30 to 50, only 2 lines long : style-append- 

 ages ovate : pappus in the ray none ; in outer disk-flowers setulose-corouiform ; in central 

 and less fertile flowers of several unequal awns and mostly coroniform-concreted at base. 

 Rothrock in Wheeler Rep. vi. 140; Hemsl. Biol. Centr.-Am. Bot. ii. 111. Gutierrezia '? qt/m- 

 nospennoides, Gray, PI. Wright. 1. c. ; Hook. Bot. Mag. t. 5155. Banks of streams, Arizona, 

 first coll. by Wriyht. (Mex., Parry & Palmer, which has been wrongly referred to the larger- 

 flowered very serrate-leaved X. Bentkamianum, Hemsl.) 



