V. PLANTS ■WRIGHTIANiE. 97 



the other hand, I am unable to draw a marked line of distinction between this L. 

 coronopifolia and a small group of plants with 15 - 25-flowered heads and more 

 herbaceous tips to the scales of the involucre, on one of which De Candolle founded 

 his Aplodiscus, as a section of Aplopappus. Indeed, the A. (Aplodiscus) discoideus, 

 DC. ! is the same species as the Linosyris Mexicana, Schlecht. Hort. Hal. p. 7. t. 4 

 (as well as Baccharis"? veneta, H.B.K. !). Gregg's No. 580, gathered between San 

 Luis Potosi and Mexico, is a variety of this with pinnatifid leaves. No. Hi of 

 Hartweg's Mexican collection is an allied species, Avith much smaller heads ; and 

 here likewise belongs Aplopappus (Aplodiscus) Menziesii, Torr. 8f Gray, of Cali- 

 fornia. A. (Aplodiscus) ramulosus, DC. !, which is Gregg's No. 625 (from Real 

 del Monte, and 790 of his last collection), appears also to be of this group, although 

 of a different habit, and with nearly subulate appendages to the style. Linosyris 

 Drummondii, Torr. Sf Gray, of Avhich better flowering specimens were recently 

 gathered at Port Lavaca, Texas, by M. Trecul, has the many-flowered heads and 

 the involucre of this group, with the foliage of L. heterophylla.* 



288. Aplopappus (Blepharodon) blephariphyllus (sp. nov.): scabro-puberulus, 

 subcinereus ; caulibus erectis herbaceis usque ad apicem foliosis ; ramis subcorym- 

 bosis monocephalis ; foliis spathulato-oblongis (ramealibus lineari-oblongis) coria- 

 ceis crebre serratis et pectinato-setigeris ; involucro nudo hemisphterico, squamis 

 pluriserialibus lanceolato-subulatis glabellis apicibus brevibus subsquarrosis ; pappo 

 biseriali rigido achenio brevi sericeo-pubescente subduplo longiore. — Plains at the 

 eastern base of the Guadalupe Mountains ; Oct. — Plant a foot or less in height 

 from a suflfrutescent % base, rigid, with much the aspect of a Grindelia. Leaves 

 about an inch long, thick, scabrous, serrate all round with closely set teeth, which 

 are tipped with rigid rather short bristles. Involucre half an inch in diameter. 

 Rays 15-18. Pappus not copious. 



290. A. spiNULOsus, DC, var. glaber, Gray, PL Fendl. p. 75. On the Rio 

 Grande, Texas. — Whole plant a little glandular, but entirely destitute of pubes- 

 cence. 



291. A. SPINULOSUS, DC. Sideranthus spinulosus, Fraser, ex Steud. ; Nees in 

 Neu-Wied. Riese, Appx. p. 14. Hills and prairies, from the Rio Frio to the San 

 Felipe. Various forms, principally those with canescent and very spinulose leaves. 



f A. RUBiGiNosus, Torr. Sf Gray, Fl 2. p. 240. On the Rio Grande, Texas. — 

 A. phyllocephalus, DC. appears to be an abnormal state of this species.f 



292. A. GRACILIS, Gray, PI. Fendl. p. 76. Dieteria (Sideranthus) gracilis, Nutt. 

 PI. Gamh., in Jour. Acad. Philad. (n. ser.) 1. p. 177. Between the Pecos and the 

 Limpia ; Aug. The canescent form ; erect, a span to a foot high, with long and 

 slender, divergent branches. Leaves small, rather appressed. 



* Crinitaria.' humilis. Hook. ! Fl. Bor. Am., is Aster (Oxytripolium) angustus, the Tripolium angustum, 

 Lindl. 



t Aplopappus (Blepharodon) gymnocephalus, BC, collected in Mexico by Alaman, Berlandier, Tate, 

 Bates, and Coulter, has the rays to all appearance yellow in some specimens, while in others they have 

 assumed a reddish hue underneath (as noticed by De Candolle), as if they had been pale purple or rose- 

 color, in which case the plant would be a Machajranthera. Perhaps it is M. setigera, Nees in Linntea, 19. 

 p. 722. The receptacle is strongly fimbrilliferous. 



