98 PLANTS WRIGHTIAN^. Y. 



293. A. GRACILIS ; a less hairy form, like Gambell's plant. Valley of the Rio 

 Grande, below El Paso ; Oct. 



294. A. GRACILIS ; a more glabrate and less setigerous variety. Valley of the 

 Eio Grande, 60 or 70 miles below El Paso ; Sept. 



295. Aplopappus (Prionopsis) ciliatus, DC. Prodr. 5. p. 346. Donia ciliata, 

 Nutt. in Jour. Acad. Philad. 2. p. 118; Hooh. Exot. Fl. t. 45. Prionopsis ciliata, 

 Nutt. in Trans. Amer. Phil. Soc. ; Torr. %" Gray, Fl. 2. p. 245. Prairies of the 

 Pecos ; Aug. — In these specimens the pappus is scarcely at all deciduous. Prio- 

 nopsis and Pyrrocoma can be received only as sections of Aplopappus.* 



t Xanthisma Texanum, DC .' Prot^r. 5.^.94. Var. a. Berlandieri: involu- 

 cri squamis obtusissimis, extimis tantum apiculatis vel mucronato-acuminatis. 

 Southern Texas, Berlandier ! On the Nueces, Trecul. — Var. /3. Drummondii : in- 

 volucri squamis fere omnibus cuspidato-acuminatis. Centauridium Drummondii, 

 Torr. %• Gray, Fl. 2. p. 246 ; Gray, PI. Lindh. 2. p. 223. Middle and Western 

 Texas, Drummond, Riddell, Wright, Lindheimer. — I believe the two are only 

 varieties of the same species; indeed, my cultivated specimens serve to connect 

 them. I noticed at the time that Drummond's plant, on which Centauridium was 

 founded, agreed in many respects with De Candolle's character of Xanthisma : but 

 in that the involucral scales were said to be very obtuse ; in ours they are remarka- 

 bly cuspidate-pointed. Moreover, the appendages of the style, although long and 

 slender, are flat, and entirely Asteroid in character. De Candolle's prior name should 

 replace ours, but the genus must occupy the position I had assigned to it. — I have 

 elsewhere remarked that the cauline leaves are often toothed, and that the radical 

 ones are laciniate-pinnatifid, or even bipinnatifid. 



•j* Bradburia hirtella, Torr. Sj" Gray, Fl. 2. p. 250. Western Texas. Also 

 gathered by Trecul. — The obpyramidal ray-achenia are strongly three-angled. 

 The truly filiform appendages of the style are quite Vernoniaceous in character. 

 The root is annual. 



296. Grindellia squarrosa, Dunal, var. grandiplora : capitulis fere duplo ma- 

 joribus. — G. Texana, Scheele in Li7incea, 21. p. 60. G. grandiflora. Hook. Bot. 

 Mag. t. 4628. On the San Pedro River ; July. Achenia quadrangular-com- 

 pressed, somewhat margined, smooth and even. — The same as Lindheimer's No. 

 418. I think No. 363 of Coulter's Californian collection, and one of Fremont's 

 from the same region, are not distinct from it. 



297. G. mvLoiDEs, Willd. ; Torr. Sf Gray, I.e. Prairies of the Rio Seco ; June. — 



* From the genus is to be excluded De Candolle's sect. ? Leucopsis, the species of which belong to 

 Noticastrum and to Chrysopsis ; and also the sect. ? Pyrochata. For A. ? Hrenkei, DC. .' I. c. p. 349, is, 

 if I mistake not, a glabrate state of Covethrogyne filaginifolia, to which also belongs Corethrogyne virgata, 

 Benth. ! The species is not very well characterized in the Flora of North America. The synonym of 

 Diplopappus leucophyllus, Lindl. is to be transferred from this species to C. tomentella (as appears from the 

 original specimens in the Hookerian herbarium), to which also belong both No. 267 and No. 268 of 

 Coulter's Californian collection, and C. obovata, Benth. ! And I suspect that No. 1772 of Hartweg's 

 Mexican collection is a glabrate state of the same species. 



Aplopappus florifer, Hook, if Am. Bol. Beech. Suppl. p. 351 (Erigeron > florifer. Hook. Fl. Bor.-Am., 

 and Stenotus florifer, Torr. Sj- Gray, Fl.) is Townsendia grandiflora ! 



