92 , PLANT-E WRIGHTIANjE. V. 



Lessing's Bracliycome xanthocomoides, of which I have seen an original specimen, 

 barely in flower, communicated by Schlechtendal to the herbarium of the Paris Mu- 

 seum. This is a diffusely spreading plant; the rays, I think, are not yellow; the 

 receptacle is conical, and the involucre, ovaries, corolla, &c. are the same as in 

 Aphanostephus, to which I should refer the plant, were it not that the appendages 

 of the style in the perfect flowers are oblong-lanceolate. Keerlia ramosa, De Can- 

 dolle's second species, founded on a plant collected by Keerl himself, has a strongly 

 conical receptacle (which is abundantly manifest in De Candolle's own specimen, as 

 well as in those retained by Martins), and plainly belongs to De Candolle's next ge- 

 nus ; indeed, it is difficult to distinguish it from Aphanostephus ramosissimus itself. 

 (The coroniform pappus of the latter is minutely setulose-fringed ; of the former, 

 more setulose and less coroniform.) Keerlia skirrobasis, De Candolle's third spe- 

 cies, which is figured in Delessert's Icones, also has a well-marked conical recepta- 

 cle, and is the same species as his own Leucopsidium Arkansanum, and is a strict 

 congener of his earlier-published Aphanostephus ramosissimus, as I have already 

 remarked, in PI. Fendl. p. 71. Keerlia, DC, must therefore be divided between 

 Gutierrezia and Aphanostephus. Singularly enough, however, while none of De 

 Candolle's species really accord with his character, I some years ago received a Tex- 

 an plant that does, in the essential points of a flat receptacle, a minute coroniform 

 pappus, and acuminate membranaceously-margined involucral scales; and this was 

 described under the name of Keerlia bellidifolia. To this a second and in some re- 

 spects difterent species of Lindheimer's later collection (K. effusa) was added re- 

 cently, but before I had obtained the information above recorded. And for these, 

 as the case now stands, since they are already published under this name, I propose 

 to continue the name Keerlia, with a new character, as subjoined.* 



pappo in radio et disco conformi brevissimo paleaceo-coroniformi. — Keelia linearifolia, DC. f Prodr. 

 5. p. 310. — Mexico, Alaman (v. sp. in herb. DC), Ghiesirecht (v. sp. in herb. Mus. Par.), Mackenzie 

 (v. sp. in herb. Hook.). Akhough large for the genus, the heads are smaller than those of Gutierrezia 

 (Odontocarpha, DC. /) Gayana, in which they are also solitary ; and the pappus is nearly the same as 

 that of G. Texana. — In Xanthocoma humilis, which Dr. Halstead gathered in Mexico, the achenia, or at 

 least the ovaries, are short and compressed, glabrous, and the appendages of the style are short and ob- 

 tuse. The stems are somewhat floccose-woolly when young. 



* KEEELIA, Gray, PI. Lindh. 2. p. 221, non DC. ! 



Capitulum pluriflorum radiatum ; ligulis 5-15 uniserialibus foemineis ; fl. disci hermaphroditis aut abor- 

 tu masculis, 5-dentatis. Involucrum turbinatum, imbricatum, pauciseriale ; squamis oblongis cuspidato- 

 mucronatis nitidis membranaceis, marginibus scariosis, extimis brevibus. Eeceptaculum planum nudum. 

 Styli rami fl. disci breves, appendice aut brevissima obtusa aut gracili lanceolata superati. Achenia ob- 

 ovata, pi. m. compressa, disci vel centralia inania gracilia, disco epigyno parvo, pappo minimo coroniformi 

 superata. — Herbae Texanse, annuse vel perennes ? caulibus gracilibus effuse ramosis ; foliis alternis 

 spathulatis oblongisve subsessilibus integerrimis ; capitulis parvulis pedunculatis solitariis vel paniculatis ; 

 ligulis albis vel cseruleis. 



1. K. BELLIDIFOLIA : annua, hirsutulo-pubescens ; caule humili e basi diffuse ramoso ; foliis membra- 

 naceis, infimis obovatis, ramealibus lineari-spathulatis, omnibus deorsum attenuatis ; ligulis (cyaneis) 7-15 

 lineari-oblongis ; fl. disci 15-25 plerisque fertilibus ; appendicibus styli brevibus obtusissimis ; acheniis 

 clavato-fusiformibus hirtellis 7 - 9-nerviis leviter (exterioribus prassertim) compressis coronula parva inte- 



