T. PLANTiE WRIGHTIAN^. 101 



monly opposite. The heads also are fewer, and rather larger (nearly 3 lines long), 

 but have about the same number of flowers, which are very similar, except 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 corymbosa : pappus e seta tinica. (Monothrix, Torr.) 



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

 apicem usque foliosis ; foliis plerumque alternis ovatis oblongisve subintegerrimis 

 glabris ; capitulis circ. 25-floris laxe corymbosis ; ligulis obovatis apice tridentatis ; 

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

 banks of the Guadalupe River, near New Braunfels, Texas, exposed to the full 

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

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

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

 bose. Heads 3 lines in length ; the in volucral 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. Staxsburii (sp. nov.) : puberula ; caulibus e basi suff'ruticosa 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. Stansbmy ; 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 ; Gray, PI. Lindh. 2. p. 

 22L 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. salicifolia, Nutt, non Pers. 

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

 salicina 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 Avide, sparingly toothed, 

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

 terior scales ovate, the others oblong-lanceolate, acute ; scales of the sterile heads 

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

 acterized by Nuttall, occur in the collection of 1851. 



305. B. ciERULESCENs, DC. Prodr. b. p. 402. On the Pio Grande and Nueces; 

 common. 



306. B. Texana, Gray, PI. Fendl. p. 75, Sr PL Lindh. 2. p. 224. Western Tex- 

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

 Felipe. 



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

 ramisque flexuosis acute angulatis, ramulis apice monocephalis ; foliis sparsis par\is 

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

 sphserico, squamis pauciserialibus lanceolatis acutis. — Valley of the Limpia ; Aug. 

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



VOL. III. ART. 5. — 14. 



