78 PLANTS AVRIGHTIAN^. VI. 



Erigeron gnaphalioides, H. B. K. (Heterochseta ■? gnaphalioides, DC), except that 

 the panicle consists of fewer, longer, and more spreading branches, and there is no 

 trace of the short exterior pappus which is so conspicuous in Kunth's figure. It 

 is manifestly an Erigeron, of the section Caenotus, to which Mr. Bentham, no doubt 

 correctly, adduces those American Conyzte of De Candolle Avith fertile hermaph- 

 rodite flowers.* 



DiPLOPAPFUS EEicoiDES, /3. HiRTELLA, Gray, PL Fendl. p. 69. Stony hills near 

 El Paso ; April : a stout, vernal form, like Fendler's No. 348. Prairies from Live 

 Oak Creek to the Rio Grande and the copper mines. New Mexico. (1171.) 



TowNSENDiA STRIGOSA, Nutt. / Gvoy, PL Fcndl. p. 70. Sandy banks of the Rio 

 Grande, above Doiia Ana ; July. Stony hills near El Paso ; March, April. (1172.) 



— The plant begins to flower when only an inch high ; at length it attains the 

 height of 3 or 4 inches. The root is long and filiform. 



DisTASis MODESTA, DC. Pvodr. b. p. 279; Gray, PI. Wright, p. 91. Rocky prai- 

 ries and hills, from Turkey Creek, Texas, to Providence Creek. (1173.) 



Keerlia bellidifolia, Gray 8f Engelm. PL Lindh. 2. p. 220, §• PL Wright, p. 91. 

 Sand-bars of the Nueces ; May. 



Aphanostephus ramosissimus, DC. ; Gray, PL Wright, p. 93. Prairies of the 

 Sabinal and Nueces, Western Texas ; May. (1174.) 



A. HUMiLis, Gray, PL Wright. L c. Sandy bed of streams, from Eagle Springs to 

 the Rio Grande ; June. Near El Paso ; March - May. (1175.) 



Bellis i>'TEGRiroLiA, Michx. Valley of the Pecos to the Prairie-dog towns be- 

 yond the Limpio ; June. (1176.) 



GuTiERREZiA (Hemiachyris) Wrightii (sp. nov.) : radice annua ; caule erecto 

 gracili pedali apice corymboso-paniculato ; ramis monocephalis ; foliis linearibus 

 planis ; capitulis turbinato-hemisphtericis ; ligulis 12; acheniis glabris ; pappo in 

 radio et disco conformi brevissimo coroniformi margine fere integerrimo. — Margin 

 of dried-up streams, between Barbocomori and Santa Cruz, Sonora ; Sept. (1177.) 



— Stem somewhat striate-angled, strict, simple, or corymbosely branched at the 

 summit; each branch or peduncle terminated by a solitary head. Leaves thin, 12 

 to 20 lines long, and a line and a half wide, rather obtuse. Heads pretty large for 

 the genus, nearly the size of those of G. (Brachyris, DC.) paniculata, not half as 

 large as in G. Alamani. Scales of the involucre with short and obtuse green tips. 

 Ligules nearly 3 lines long. Disk-flowers 20 or more, all fertile. Appendages of 

 the style linear-lanceolate, acute. Pappus strictly coroniform, with the even edge 

 entire or very obscurely denticulate. — An interesting accession to the genus, on 

 accoiant of the annual root and the entire pappus. In the allied G. Alamani, Gray, 

 PL Wright. ^. 91, as in other species of the section, it is coroniform, but strongly 

 toothed or lobed. The shape of the appendages of the style, as well as the pres- 

 ence of a pappus, distinguishes this and G. Alamani from Xanthocoma. The fol- 



* Erigeron gnaphalioides, H. B. K. is plainly a congener of the Conyza gnaphalioides, H. B. K. (to 

 which, if I mistake not, belongs Heterochaeta stricta, Benth. PI. Hartir.), the type of Cassini's genus 

 Lcennecia, which should rank merely as a subgenus of Erigeron, between CiEnotus and Stenactis ; differing 

 from the former in the conspicuous exterior pappus, from the latter in the short rays as well as in habit. 



