42 ^ 



241 Thelespeima gracile Gray. Corpus ChriHti (N.ioces county), Tena (Duval. 



cou.itv), Sauta Anna (Colen.au county), ami Screw Bean (Pr.suho county), 

 lu the Santa Anna Hpecin>en.s the hoads are nearly ahvaya riuhate, with deep 

 yellow rays about O'""^ lon^, and the pappus can liavdly be called " subulate, 

 iu fact descriptions have hardly done justice to the very conHpicuous pappus, 

 which is composed of two lanceolate, retrose, bristly scales nearly as long as 



the corolla-tube. 



242 Thelesperma longipes Gray. Screw Beau (Presidio county). 



243. Cosmos parviflorus IIBK. Lin.pia cafiou (Presidio county). Many ot tbo 

 akeue beaks are four-awned. 



244 Bideiis Bigelovii Gray. Limpia canon (Presidio county). 



245' Perityle Vaseyi Coulter, n. sp. Minutely glandular pubescent, simple or with 

 short brancblets, from a slightly lignescent ba.se, 2 to IS'"-" high, leafy : leaves 

 lar.^e for the genus, *J.5 to C.5-" long, including the petiole (whudi is some- 

 what shorter than the blade), with broad outline, palmately or pinnately 

 divided into three long-stalked broadly cunoate divisions ; the divisions three 

 to five-parted ; the ultimate segments mostly cuneate and threo-lobed : lioads 

 rather few and scattered, on long or short peduncles, 10 to 12"'- high: in- 

 volucral scales linear-oblong, acute or acuniinate, with margins more or less 

 ciliate at tip : rays 4 to C-" long, deep yellow, oblong, three- toothed at apex : 

 disk-corollas fiuiuelfonn, yellow, 5^™ long : style-tips setacoous-hliforni and 

 hirsute: akenes oblong, pubescent on the faces, hispid-viilons on the mar- 

 gins 3 r,-- long, crowned with a pappus of bristle-like s.iuaiiiolla! and a single 

 more or less barbcUato awn as long as the akene.-Chisos Mountains (Foley 

 county). Nearest P. Farryi Gray, but decidedly distinct, and lu the shape of 

 tlie disk-corolla not even a member of the same section. 



246 Baileya multiradiata Harv. .t Gray. Chenato Mountains (Presidio county). 



247 Riddellia arachuoidea Gray. Chenato Mountains (Presidio county). 



248 Riddellia tagetina Nutt. Screw Bean (Presidio county)." 



249 Bahia absinthifolia Benth. Bio Grande City (Starr county). 



25o! Bahia absinthifolia B(mth.,var.dealbata Gray. Screw Bean (Presidio county). 



251 Bahia pedata Gray. Screw Bean (Presidio county.) 



252 Schkuhria Wrightii Gray. Limpia caQou (Presidio county). A species of- 



sonthern Arizona, whoso range is thus extended across New Mexico into west- 

 ern Texas. 



253 Hymenothrix Wrightii Gray. Chenate Mountains (Presidio county). Not 



reported befor... east of Arizona iu the United States, but I'ringle has col- 

 lected it in Chihuahua. 



254 Florestina tripteris DC. Point Isabel. 



255 Sartwellia Flaveri^ Gray. Screw Bean (Presidio county). 



256 Flaveriachlor^efolia Gray. Screw Bean (Presidio county). Fine specimens 



of this imperfectly known species bring to light some additional characters. 

 The plant becomes more than G>"" high, with a thick stem, and the lower 

 loaves become T.f)'"' long and 5<"' wide at the perfoliate base. The coarso 

 "glaucous stem, with its broad conuate-perfoliate smooth ami entire leaves, 

 give the plant the look of an Asclepias. A more important fact is that all tho 

 Nealley material has pappus, composed of two to four thin palea-,, which are all 

 on one side, leaving tho other side naked. In the Synopt. Flora (p. 354) it is 

 said that " a few flowers wore once seen with a pappus of four thin paleso." 

 As this character appears in all of our abundant material tho genus charac- 

 ter should be amended iu tliat cliaracter. It is impossible to admit these 

 specimens into /'VrtPeria, as defined by lientham & Hooker or Gray, as '< no 

 pappus" is one of its distinctive characters. 



257 Porophyllum macrophyllum DC. Limpia canon (Presidio county). 



258. Porophyllum scopaiium Gray. Chisos Mountains (Foley county). 



