T. 



PLANT^ "SVRIGHTIAN.E. 



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350. Oltgogyne Tampicana, DC. Prodr. 5. p. 629, 8f Deless, Ic. Sel. 4. t. 38; 

 Grai/, Pl. Fendl. p. 87, adnot On the Rio Grande, Texas. — Besides the two 

 strong awns, as figured in tbe work above cited, there are commonly two or three 

 shorter intermediate ones. Many of the heads are suhsessile. The genus appcars 

 to be scarcely distinct froni Blainvillea, on the one hand ; while, on the other, the 

 want of laciniate wings to the ray-achenia and the shorter appendages to the style 

 alone distinguish it from Synedrella. 



351. Sanvitalia Aberti, Gray, Pl. Fendl. p. 87. Damp yalleys near the Rio 

 Grande below El Paso ; Sept. " Flowers white. Plant two or three feet high." The 

 specimens are less than a foot high, from an annual root. Leaves sometlmes linear. 



# _ 



The fruit as described in Pl. Fendl^ from Lieut Aberfs specimens. The disk is 

 greenish; the palese lanceolate, cuspidate, rather rigid, and longer than the flowers. 

 Ligules at most two lines long. The species is remarkable for the extremely short 

 and conical awns to the ray-achenia.* 



Pappus nuUus. — Herbse glabnie ramosce (basi suffrutescentes ?) ; foliis oppositis petiolatis ovato-lanceolatis 

 subtriplinerviis dentibus callosis serrulatis; capitulis terminalibus corymbosis; floribus albis. 



L G. Mexicana: fob'is lanceolato-ovatis basi subcuneatis truncatisve triplinerviis serratis, serraturfs 

 ^ appressis; involucro oblongo-campanulato, squamis oblongis obtusis; liguTis 3-5, tubo inferne villoso, fl. 



( disci 10- 15, — a Mexicana, Hu7nL ^ Bonpl ! Ph ^q. 1. p. 144. t. 41 ; F. B. K. Nov. Gen. Sf Sp. 



4. p. 247. — Mexico ; province of Michoacan, Humloldt. — The specimcn in the herbarlum of the Paris 

 Museum is poor and young. Heads three or four lines long. 



2. G. ATRiPLiciFOLiA (sp. nov.) : foliis triangulato-lanceolatis hastatisve acuminatis basi 5-7-nerviis 

 argute serratis, serratulis subulatis inferioribus paucis laciniato-elongatis patentibus ; involucro breviter 

 campanulato, squamis late ovalibus abrupte mucronato-acuminatls ; ligulis 3 (-5,^) tubo glabro ; fl. disci 

 15-20.— Morelia, Mexlco, GaleoUi, No. 2418 (v. sp. in Mus. Par.) ; at an elevation of 7,000 feet. 

 The root is annual The flowers arc stated by the collector to be whhe. The tube of the ray-corolla is 

 scarcely longer than the broadly oval nine-nerved ligule, Achenium as in the next species, but perfectly 



glabrous. 



3, G. TuLOCARPus : foliis obloncro-lanceolatis basi obtusis vel acutiusculis calloso-serrulatis ; capitulis 

 fasciculato-confertis ; involucro cylindrico angusto, squamis lineari-oblongis acutis ; ligula solitaria tubo 



glaberrimo; fl. disci4-5. 



Hook. &- 



i Mazatlan, Gregg. — Probably No. 2407 

 of Galeotti's collection from Zimapan, which I have seen in the Paris herbarium, belongs to this species. 

 Involucre three lines long, less than a line wide, looking like that of a Tagetes or a Stevia. Achenia mi- 

 nutely hairy under a lens. The flowers are stated by Hooker and Arnott to be yellow, but Dr. Gregg 

 noted that they are white. The styles I find to be deeply two-cleft. 



Sanvitalia procumbcns, Lam. is inadvertently described by De Caudolle as having the exlerior 

 (instead of the inner) disk-aclienia winged and aristellate. The outcr ones are wingless and exaristate, as 

 stated in the generic character and as figured by Cavanilles, &c. 



S. ocymoides, DC. requires to be again examlned. An authentic (unless misplaced) specimen of 

 Berlandier's plant, which I possess,has the ligules by no means " very small," but longer than the awns of 

 the ray-achenia, the exterior disk-achenia roughened and awnless, the inner ones surrounded with a 

 contlnuous ciliate wing and mostly biaristcllate ; — indeed, it is not to be distinguished from S. procum- 

 bens. 



mnermost 



D 



acheniaslightly, if at all, winged. , v i 



S. tragia>folia, DC, which has more hispid and rough foliage than the others, and very short hgules, 

 only half the length of the conspicuous awns, was gathered at Walnut Springs, near Monterey, by Dr. 



