88 



PLANT."E AyRIGTITIAN.i:. 



YI. 



e-xliibited awned and silky-piibesccnt achenia. Tlie spccimens preserved ih my own 

 herbarium and in that of Mr. Lowcll are entirely of the prcsent plant, which has 

 the achcnia glabrous and awnless, or rarely with two minute and aristelliform teeth ; 

 adding another instance of^the want of a pappus in this gcnus. 



S. ? (Ger.ea) scaposa (sp. nov.) : cinerco-puberula ; cauHhus sufFruticosis ? ab- 

 breviatis folia linearia rigidula scabra conferta gerentibus in pedunculum pra}longum 

 scapiformcm monoccphalum productis ; involucro fere uniseriale discum a^quante, 

 squamis lincaribus foliaceis hirsutis laxis ; pappi aristis ina^qualibus corolla brevi- 

 oribus undique cum achenio villosissimis. — Stony hills between the Mimbres and 



the Rio Grande, Ncav Mexico ; Oct. — Only four specimens were gathered, and 

 all but one of them with the flowcrs not yet expanded. The proper stems are 

 only two or thrce inches long, and very leafy. Leaves alternate, much crow^ded, 

 sessile, 2 or 3 inches long, one or two lines wide, acutish, rather thick and rigid, 

 cincreous-scabrous, one-nervcd, or obscurely three-nerved, somewhat veiny. Scape, 

 or peduncle, 6 to 12 inches long, naked or ncarly so. Head half an inch in length. 



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Involucre lax or spreading, many-flowered. Plowers yellow. Ligiiles broadly 

 obovate or cuneiform, 3-toothed at the apex, half an inch long. Palese of the 

 convex receptacle conduplicate around the disk-flowers, membranaceous, a little 

 hairy near the obtuse tip. Disk-flowers ncarly as in S. (Gera^-a) canescens, PL 

 FendL p. 85. Ovaries compressed, very silky-villous. Pappus of two chaffy awns 

 of uneq^ual length; the shorter awn often not longer than the villous hairs of the 

 achenium, both very villous for their whole length, Although different in habit, 

 this plant appears to be congeneric with one which, in Proceed. Amer. Acad. 1. 

 p. 48, I namcd Gersca canescens, and subsequently, in Pl. Fendl l c, reduced to 

 a subgenus of Simsia. It is, as it were, an Encelia with awns. 



ViGuiEHA coRDiFOLiA, Gi^ai/, PL Wriffht p. 107; var. foliis omnibus breviter 

 sed manifeste petiolatis tantum subcordatis acuminatis. — Yalley of Coppermine 

 Creek, New Mexico, growing under trees ; Oct. (1225.) — These are better speci- 

 mcns than Wrighfs No. 332, on which the species was founded, with thinner leaves, 

 all of thera on i^etioles of 1-^ to 3 hnes in length. The scales of the involucre are 

 lanceolate, the exterior, witli their considerable acumination, little shorter than the 

 inner. The awncd scales of the pappus are nearly as long as the disk-corolla ; the 

 intermediate scales, 2 or 3 on each side, are almost a line in length, oblong, erose- 

 laclniate at the apex, nearly glabrous. Ligules about 8, half an inch long. 



V. coRDiFOLiA, var. gracilis ; foliis minoribus fere membranaceis grosse serratis ; 

 involucri squamis ocquilongis. — "With the foregoing ; of which it is evidently a 

 state, growing in more shaded situations. 



y. coRDiFOLiA, var. foliis amplis (3-4 unc. longis 2i- 3 latis) membranaceis basi 

 vix subcordatis breviter petiolatis. — Sides of a ravine at Santa Cruz, Sonora ; Sept. 

 (1226.) — This has the involucre with broader scales, as in-No. 332, except that 

 the outer oncs are mostly as long as thc inner. Thc leaves are thin, and distinctly 

 petioled. The intermediate puleae of the pappus are shortcr than in No. 1225, 

 commonly 4 or 5 on each side, and cither strigose-pubcscent or nearly glabrous. I 

 cannot distinguish any of these plants from V. cordifolia ; the name of which proves 

 not to have been happily chosen. 



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