120 PLANTS WRIGHTIANiE. Y. 



rulis. — Rocky banks of the San Pedro River, and mountains east of El Paso ; July - 

 Sept. — Stems one or two feet high from a woody base, rigid, loosely corymbose at 

 the summit. Leaves thickish, 12 to 18 lines long, those of the flowering branches 

 small and sparse. Heads barely half an inch long. Involucre not glaucous, nor 

 colored except with one or two purplish glandular lines or spots. Pappus yellow- 

 ish, exserted to twice the length of the involucre. The corollas appear to be yellow. 



370. P. Greggii (sp. nov.) : caulibus e basi suffruticosa adscendentibus rigidis ; 

 foliis coriaceis anguste linearibus mucronatis parce glandulosis ; involucri cam- 

 panulati squamis 5-7 oblongis obtusis vel acutiusculis planis viridulis glandulis ob- 

 longis notatis ; acheniis erostratis pubescentibus. — Hills in the Pass of the Limpia; 

 Aug. (Also Valley of Parras, Cohahuila, Dr. Gregg.) — Stems 8 to 12 inches high, 

 simple or branched. Leaves one or two inches long, a line or less in width, often 

 curved, rigid, more or less glandular. Heads two thirds of an inch long. Scales 

 of the involucre five or six lines long, rather broad and flat, chartaceous, in 

 Wright's specimens only five in number, while in Gregg's there are seven. The 

 flowers in both are yellow. Achenia three lines long, rather shorter than the 

 .fulvous pappus.* 



371. Agassizia suavis. Gray 8f Engelm. Proceed. Amer. Acad. 1. p. 50, 8f PI. 

 Lindh. 2. p. 229. Gaillardia simplex, Scheele in Linncea, 22. p. 160. Rocky hills, 

 Austin, Texas ; May. — This is now in cultivation in the Cambridge Botanic Gar- 

 den. The flowers exhale a fragrance much like that of the Heliotrope. 



372. Gaillardia pinnatifida, Torr. in Ann. Lye. N. Y. 2. p. 214; Gray, PI. 

 Fendl. p. 95. Valley of the Pecos, Limpia, and Rio Grande, New Mexico ; Aug. 



373. G. puLCHELLA, Foug. ; Torr. 8f Gray, Fl. 2. p. 366. Prairies, near Austin, 

 Texas; May. — This is the same as Lindheimer's No. 103 of the second distribu- 

 tion, enumerated in PI. Lindh. 2. p. 230, and there wrongly referred to G. picta. 



374. G. PULCHELLA, var. capitulis minoribus. Hills of the Rio Frio ; June. Dr. 

 Gregg found this to extend as far into Mexico as Reynosa and Monterey; and he 

 also gathered what I take to be G. lanceolata at Saltillo. 



375. Palafoxia Hookeriana, /3. subradiata, Torr. &f Gray, Fl. 2. p. 368. Val- 

 ley of the Rio Grande, 60 or 70 miles below El Paso ; Sept. 



f P. Texana, DC. Prodr. 5. p. 125; Torr. 8f Gray, I. c. From Austin to the 

 Rio Grande, Texas ; May - Aug. — The pappus varies much in size, and is either 

 acute or obtuse. f 



* The Mexican species greatly need revision. The subjoined is a well-marked new species, with the 

 heads resembling those of P. Greggii. 



PoROPHYLLUM AMPLExicAULE {Eiigelm. tned.) : glaucum ; caulibus basi fruticosis teretibus erectis ; 

 foliis ovato-lanceolatis acutis semiamplexicaulibus carnosis eglandulosis siccate nervulosis, caulinis plerisque 

 oppositis ; involucri campanulati squamis circiter 8 oblongis acutiusculis subplanis viridulis parce lineato- 

 glandulosis ; floribus flavis ; acheniis minute hirtulis. — Near Messillas, Cohahuila, Mexico, Gregg. — 

 Stems two feet high. Leaves an inch or more in length, four lines wide at the base, thence tapering to 

 an acute point. Heads three quarters of an inch long ; the pappus tawny. 



t Palafoxia Lindenii (sp. nov.) : tenuiter cinereo-puberula ; ramis floriferis glandulosis ; foliis ob- 

 longo-lanceolatis obtusis ssepe mucronulatis in petiolum attenuatis, inferioribus subtrinervatis ; capitulis 



