V. 



PLANT^ WRIGHTIAN^. 



101 



moiily opposite. The heads also are fewer, and ratlxer larger (nearly 3 lines lonf^), 

 but have about the same number of flowers, which are very similar, cxccpt that 

 there are no rays. I notice that one or two of the exterior corollas occasionally be- 

 come somewhat ampliate and irregular. 



# * Capitula solitaria vel corymhosa : pappus e seta unica. (Monothrlx, Torr.) 



L. LiNDHEiMERi (sp. uov.) : cauHbus e basi lignea assurgentibus puberulis ad 

 apicem usque foliosis ; fohis plerumque alternis ovatis' oblongisve subintcgcrrimis 

 glabris ; capitulis circ. 25-floris laxe corymbosis ; liguUs obovatis apice tridcntatis ; 

 seta pappi tubum corollae disci tantum sequante. — " Perpendicular rocks on the 

 banks of the Guadalupe E-iver, near New Braunfels, Texas, exposcd to the full 

 glare of the sun," Lindheimer: floweringin May, 1850. — Stems 6 or 8 inches high. 

 Leaves rather thin, 6 to 10 lines long, on petioles of 3 lines long. Peduiicles slen- 

 der, an inch or less in length, bearing one or two setaceous bracts, loosely corym- 

 bose. Heads 3 lines in length; the involucral scales lanceolate, 12 or 14. Branch- 

 es of the style as in the preceding species. Young achenia minutely hispid on the 

 acute margins, otherwise glabrous. 



L/. Stansburii (sp. nov.) : puberula ; cauHbus e basi suffruticosa erectis parce 

 ramosis, ramis apice nudis monocephalis ; foliis plerisque alternis rotundatis sub- 

 dentatis ; capitulis plusquam 30-floris ; ligulis oblongis apice bidentatis disco sub- 

 longioribus ; seta pappi corolla disci paullo breviore. — Near the Great Salt Lake, 

 Utah, Capt. Stamhiiri/ ; communicated by Dr. Torrey. Stems nearly a foot high. 

 Head three lines long and as broad. Scales of the involucre about 15, lanceolate- 

 oblong. Branches of the style filiform-subulate. 



302, 303. Baccharis angustifolia, Michx., Fl. 2.p. 125; Graij, Pl. Lindh. 2. p. 

 224. On "the Rio Grande and Nueces, Texas. The same as Lindheimer's plant so 



named. 



304. B. sALiciNA, Torr. 8f Gray, Fl 2. p. 258. B. saHcifoha, Nutt., non Pers. 

 Banks of the Pecos and its tributaries ; Oct. I have no authentic specimen of B. 

 sahcina for comparison. Ours belong to a plant of three or four feet in height, with 

 mostly linear leaves, two inches long and two or three lines wide, sparingly toothed, 

 or the uppermost entire. Involucre in the fertile plant three lines long ; the 



terior scales ovate, the others oblon 



of the sterile hcads 



ovate. — Good specimens of the plant, with oblong-lanceolate leaves, as briefly char- 

 acterized by Nuttall, occur in the collection of 1851. 



805. B. CJERULESCENS, DC. Prodr. 5. p. 402. On the Rio Grande and Nueces; 



common. 



306. B. Texana, Grai/, Pl. Fendl p. 75, §• Pl Lindh. 2. p. 224. Westera Tex- 

 as ; common. — A shrubby variety of this was gathered in the prairies on the San 



307, B. Wrightii (sp. nov.) : hcrbacea, glabra ; caulibus ramosissimis gracilibus 

 ramisque flexuosis acute angulatis, ramulis apice monocephalis ; foliis sparsis parvis 

 linearibus et lineari-subulatis integerrimis uninerviis; involucro pl. masc. hemi- 

 sphffiiico, squamis pauciserialibus lanceolatis acutis. — Valley of the Lmipia; Aug. 



Plant two feet or more in height, with much the aspect of Aster (Oxytripolium) 

 voL. m. art. 5. — 14. 



L. 



