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.) 



++ ++ 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 pinnatifkl : heads 

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

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

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

 (Nat. from. Eu.) 



# # Americnn species: heads large: scar or insertion of akene obliquely basal: bracts of invo- 

 lucre unarmed, the appendage conspicuously pectinate-flmbriate : anther-appendages distinct. — 

 Plectocepkalus, Don. 



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

 high, striate-suleate, 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 akene. — Jour. Acad. Philad. ii. 117 ; Barton, El. Am.-Sept. t. 50 ; Reichenb. 

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

 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 Nutiall. (Adj. Mex.) 



Tribe X. MUTISIACE.E, p. 82. 



202. HECASTOCLfilS, Gray. ( "E/cao-j-os, each, kA«g>, 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. ShocMeij. 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. hypoleiica, Gkat. 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- 

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

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

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

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

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



