164 COMPOSITE. Aphnnostephus. 



ramosissima, Gray, PI. Fendl. 71, & PI. Lindh. ii. 220. — Rocky and sandy prairies, Texas. 

 (Adjacent Mex.) 



A., bumilis, Gb.i.t, 1. c. Low and diffuse, soft-pubescent and cinereous : leaves rarely entire, 



often pinnatifid : heads on slender peduncles : rays 3 or 4 lines long : akenes shorter and 

 more distinctly costate-angulate. — Leucopsidinm humile, Bentli. PL Hartw. 18. EgUtes 

 humilis, Gray, PI. Fendl. 71. — Southern and western borders of Texas, Wright, Palmer (but 

 his plant, no. 494, doubtful), Eeverchon. (Jlex.) 



A. E.i.ii6sus, Gray, Proc. Am. Acad. xvi. 90 {Keerlia ramosa, DC), Mexico, Keerl, is im- 

 perfectly known. 



* * Pappus more conspicuous and dentate or laciniate: base of the corolla-tube in age promi- 

 nently thickened and indurated, long persistent on the strong!}^ aiigulate-costate alcene. 



- A. Arkansanus, Gray, 1. c. Diffuse, a foot high, cinereous-pubescent : leaves from 

 oblong-spatnlate to broadly lanceolate ; lower often toothed or sinulate-lobed : heads larger : 

 rays commonly half-incli long : outer akenes usually suberose-angled or ribbed : pappus 

 mostly obtusely 4-5-lobed or pluridentate. — Lcucops/dinm Arhansanum, DC. Prodr. vi. 43. 

 Keerlia skirrobasis, DC. Prodr. v. 310; Deless. Ic. iv. t. 18; Hook. Ic. t. 240. Egletes Arkaii- 

 siiiia, Xutt. Trans. Am. Phil. Soc. vii. 394; Torr. & Gray, Fl. ii. 411. — Plains of Arkansas, 

 Kansas, and Texas ; first coU. by Berlandier. 



Var. Hallii, Gray, 1. c. Somewhat smaller : leaves varying from entire to pinnately 

 parted : crown of the pappus more couspicuous, deeply cleft into 4 or 5 unequal subulate- 

 acuminate lobes ! — Texas, E. Hall (no. 303, 304), Palmer. 



37. GREENELLiA, Gray. {Rev. Edward Lee Greene, the discoverer.) 

 — Slender and low winter annuals ; the tj-pical species (analogous to Gutierreziri) 

 dii¥use and conspicuously radiate ; an ambiguous species rayless, and perhaps not 

 truly congeneric. — Proc. Am. Acad. xvi. 81. 



■'G. Arizonica, Gkay, 1. c. Smooth and glabrous, diffusely branched from the base: leaves 

 small (inch or less long), entire, veinless, sessile, alternate ; radical ones lanceolate or ob- 

 scurely spatulate, hispidulous-ciliolate ; cauline narrowly linear and gradually reduced to 

 subulate : heads solitary at summit of divergent filiform branchlets : involucre 2 or .3 Hnes 

 high and wide; bracts with a conspicuous su'.iapical green sput ; ravs 10 to 16, oblong or 

 obovate, white: mature akenes densely wlute-villous, the hairs tipped with a capitellate 

 gland: border of the pappus-crown multisetulose-dissected. — Mesas of Arizona, Greene 

 (1877), Leminon, Prinrjle. The root obviously not perennial. 

 G. discoidea, Gray. Stems or branches numerous from a probablv monocarpic but lig- 

 nescent root, strict, very leafy : leaves all narrowly linear, acute ; the lower (oier an inch 

 long) with ol)scurcly ciliolate-scabrous margins: heads somewhat corvmbose : involucre 

 barely 2 lines high ; the bracts more scarious and with indistinct green spot : rays nons : 

 ovaries glabrous: pappus pluridenticulate. — Proc. Am. Acad. xix. 2. — S. Arizona la 

 Tanner's CaSon, Liinmon. ' 



38. KE:fiRLIA, Gray. {F. W. Kecrl, a German traveller in ilexieo.) - 

 Diffusely and slenderly branched Tc^xau herbs, leafy-stemmed ; with small panicu- 

 late heads on almost capillary peduncles, white or purple ravs, and oblong entire 

 sessile leaves ; the style-appendages in one .species much elon^iitcd (in the manner 

 of the preceding genus), and this has only sterile ovaries in the disk. — PI. Lindh. 

 ii. 220, & PL Wright, i. 92, not DC, whose genus of this name w:is founded on 

 two species of Aphanostejihiis and a X<iuthoc<-phuhim, to which was added a syn- 

 onyme belonging to a Bellis. 



K. bellidifolia, Gray & Engelm. Annual, pubescent, effusely l>ranched from near the 

 base, a span or two high; when young with the habit of Bellis lnteriri,Uia: lower leaves 

 obovate or spatulate ; uppermost somewhat linear : inv.ducre only 2 lines long • ravs 4 to 15 

 blue: style-appen.l:iges in the disk-flowers short and very obtuse: akenes obovato-clavate 

 and moderately compresse.l. - Prur. Am. Acad. i. 47; PI. Lindh. I. c; PI. AVrieht 1 c - 

 Fertile soil, Texas, Lindheimer, Wright. a ■ • • 



