Gochnatia, COMPOSITE. 407 



C. JACEA, L. Heads usually larger: brownish appendages of the involucral bracts merely 

 lacerate : marginal flowers neutral and with enlarged palmate corollas, forming conspicuous 

 false rays: otherwise like the preceding. Fl. Dan. t. 519; Reichenb. Ic. Fl. Germ. xv. 

 t. 754, 755. Charlotte, Vermont, Pringle. Near New York, c., as a ballast-weed. (Nat. 

 from Eu.) 



n- -w- Annual, with blue flowers, varying to white or purple: pappus of unequal bristles about 

 the length of the akene. 



C. CYANUS, L. (BLUEBOTTLE.) .Slender, branching, a foot or two high, whitened when 

 young with floccose wool : leaves linear, entire, or lower toothed, sometimes pinnatifid : heads 

 naked on slender peduncles: involucral bracts rather narrow, fringed with short scarious 

 teeth: marginal flowers neutral, with much enlarged radiatiform corollas. Enl. Bot. 

 t. 277; Keichenb. 1. c. t. 768. Escaped from gardens sparingly in the Atlantic States. 

 (Nat. from. Eu.) 



* * American species: heads large: scar or insertion of akene obliquely basal: bracts of invo- 

 lucre unarmed, the appendage conspicuously pcctiuate-fimbriate: anther-appendages distinct. - 

 Plectocephalus, Don. 



C. Americana, NUTT. Annual, nearly glabrous : stem stout, commonly simple, 2 to 6 feet 

 high, striate-sulcate, thickened under the naked head : leaves entire or mostly so, oblong- 

 lanceolate, mucronate: involucre inch or inch and a half in diameter; its very numerous 

 bracts all with conspicuously fringed scarious appendages : flowers rose-color or flesh-color ; 

 the hermaphrodite ones forming a disk of 1 to 3 inches in diameter; the neutral marginal 

 ones (with their very narrow lobes an inch long) forming an ample ray : style filiform, entire 

 to the minutely 2-dentate stigmatic tip : pappus of copious similar but unequal bristles 

 longer than the akeue. Jour. Acad. Philad. ii. 117 ; Barton, Fl. Am.-Sept. t. 50; Reichenb. 

 Ic. Exot. t. 132 ; Fl. Serres, iv. t. 327 ; Mcehan, Nat. Flowers, ser. 2, ii. t. 17. C. NuttaRii, 

 Spreng. Syst. iv. 298. C. Mexicana &, C. Americana, DC. Prodr. vi. 575. Plectocephalus 

 Americanus, Don, Brit. Fl. Gard. ser. 2, t. 51. Plains of Arkansas and Louisiana to Ari- 

 zona; first coll. by Nnllall. (Adj. Mex.) 



TRIBE X. MUTISIACE^E, p. 82. 



202. HECASTOCLEIS, Gray. ("E/cao-ro?, each, /<Aao,, to shut up, each 

 flower in an involucre of its own). Proc. Am. Acad. xvii. 220. Single 

 species. 



H. Shockleyi, GRAY, 1. c. Low and glabrous shrub, with rigid branches, and rigid leaves 

 of two sorts ; cauline small, linear-lanceolate or subulate, cuspidate-tipped, and on the sides 

 usually a few spiniform teeth, also fascicled on axillary spurs ; floral ones 3 or 4 in a whorl 

 or cluster, larger (half-inch or more long) and oval or ovate, papyraceous, reticulated, mar- 

 gined with sparse slender prickles, forming a loose external involucre around a fascicle of 

 few or several sessile heads (these about 5 lines long and fusiform) : flower apparently dull 

 white. Esmeralda Co., W. Nevada, in an arid desert region, W. S. Shockley. By the style 

 and habit evidently Mutisiaceous rather than Cynaroideous. 



203. GOCHNATIA, HBK. (F. C. Gochnat, of Strasburg.) American 

 shrubby plants ; with coriaceous leaves usually entire and tomentose beneath, 

 and white or whitish flowers. Nov. Gen. & Spec. iv. 19, t. 309. Gochnatia 

 & Moquinia (at least in part), DC. ; Benth. & Hook. Gen. ii. 490. 



G. hypoleuca, GRAY. Rigid shrub, 6 to 8 feet high : leaves oblong or oval, very short- 

 petioled, commonly inch or more long, glabrous and bright green above, finely white- 

 tomeutose beneath (like an Olive-leaf) as also the brauchlets : heads in sessile somewhat 

 thyrsoid-paniculate fascicles, half-inch or less long : involucre cylindraceous, 5-7-flowered : 

 bracts ovate and oblong, outermost very short : flowers white, all hermaphrodite ! Proc. 

 Am. Acad. xix. 57. Moqninia hypoleuca, DC. Prodr. vii. 23. Southern Texas, between the 

 Rio Frio and the Nueces, Palmer. (Adj. Mex. ; first coll. by Berlandier.) 



