! 



VI. 



PLANTJi; WRIGHTIAN^. 



73 



perantibus; involucre 12-floro cylindraceo glaberrimo, squamis pliuiscriatis obtusis, 

 exterioribus cvalibus oblongisve, intimis linearibus ; acheniis pubcrulis ; pappo 

 scabro. — In a mountain ravine near Santa Cruz, Sonora ; Sept. (1140.) 

 " Stems branching from the root, 1-3 feet high." Leaves very thin and membrana- 

 ceous, one to two inches in length, longer than broad, especially the uppcr ones, not 

 so veiny as those of B. reniformis, slightly if at all subcordate. Ileads about 5 

 lines long, on sbort pedicels. Involucre stramineous. — Perhaps too closely rclated 

 to B. reniformis ; but none of the leaves are reniform, nor so much dilated, and the 

 heads are larger. 



B. FLORiBUNDA (sp. uov.) i hcrbacea ; caule glabello erecto folioso superne pani- 

 culato; foliis alternis longe petiolatis glabris deltoideo-ovatis vel summis ovato- 

 oblongis acutis dentatis triplinerviis venosis ; corymbis polycephalis subaphyllis in 

 paniculam compositara amplam laxam digestis ; pedunculis pedicellisque glanduloso- 

 pubescentibus erectis; involucro • 18 - 20-floro pauciseriali basi 2 - 4-bracteato, 

 squamis extimis oblongis seu lanceolatis acutis parce glandulosis, intimis linearibus 

 obtusis glabris ; acheniis puberulis ; pappo scabro. — Ravines near Santa Cruz, and 

 on rocky banks of the San Pedro, Sonora; Sept. (1141.)— - Stems apparcntly 3 

 or 4 fect high ; the ample compound corymbose panicle often a foot in length when 

 fuUy developed, and bearing a large number of heads. Leaves sparsely resinous- 

 punctate, and the floral ones glandular, otherwise glabrous, rather firm in texture, 

 in shape much like those of Eupatorium ageratifolium, but alternate, the lower 

 truncate at tlie base, slightly if at all subcordate, 2 to 3 inches long, li to 2 

 inches wide at the base ; the uppermost narrower and becoming acute or cuneate 

 at the base. Bractlets lanceolate and linear. Heads 5 lines long, not pendulous. 



A very distinct species, belonging to the same section as B. cordifolia. 



B. Fendleri, Gra^, Pl Fendl p. 63. Sides of mountains, near the coppcr mines, 

 New Mexico ; Aug. (II42.) — Leaves both opposite and alternate. 



B. GRANDiFLORA, Nutt. / Torr. 8f Grai/, Fl. Sides of mountains, at the coppcr 



mines, New Mexico ; Oct. (1143.) 



B. siMPLEX (sp. nov.) : herbacea, glabella ; caulibus e radice lignescentc plurimis 

 simplicibus apice nudo monocephalis vcl 2-4-cephaIis ; foliis oppositis nunc alter- 

 nis deltoideo-cordatis summis triangulato-hastatis crenato-dentatis basi trincrvatis 

 longiuscule petiolatis ; involucro plusquam 20-floro pauciseriali basi breviter brac- 

 teolato, squamis linearibus acutis ; acheniis hirtellis ; pappo barbellulato-scabro. 

 Hills east of Santa Cruz, Sonora; Sept. (1144.) — Stems slender, crcct, 12 to 18 

 inches high. Leaves an inch or less in length, on petioles 4 to 6 lines long; the 

 lowest broad and very obtuso ; the upper successively more triangular-oblong and at 

 length acute, strongly crenate-toothcd towards the cordate base, almost glabrous. 

 Peduncle 2-3 inches long, at least when solitary; when there are two or more 

 heads the peduncle of the lower oiie is an inch long. Heads 7 or 8 lines long, 

 larger tban in B. grandiflora ; the involucre resembling that of B. oblongifolia ; 



but the scales narrower. 



EuPATORiuM Wrigiitii, Grai/, PI. JVri^kt p. 87. Crevices of rocks, at Guada- 

 lupe Pass, New Mexico; Oct. (1145.) — Heads rathcr larger than in No. 254. 



