310 PROCEEDINGS OP THE AMERICAN ACADEMY, 



pubescent : pappus of about 8 broadly obovate scarious scales, 2 mm. 

 long, nearly or quite as broad : achenes puberulent, 4 to 5 mm. long. — 

 Collected by C. G. Pringle, on calcareous bluffs, near Tula, altitude 

 2,100 m., 6 August, 1896, no. 6407. Allied to B. Schaffneri, AVats., from 

 which it is distinguished by its perennial base, large heads and flowers. 



Tagetes triradiata. An annual erect branching glabrous herb, 4 to 

 5 dm. high : stems sulcate, striate, greenish purple : lower branches oppo- 

 site, upper alternate, ascending : leaves imparipinnately divided to the 

 narrowly winged midrib ; divisions subopposite in 7 to 10 pairs, narrowly 

 lanceolate, dentate with acute and often setigerous teeth, 10 to 16 mm. long, 

 3 to 6 mm. broad, much reduced near the base of the leaf: inflorescence pan- 

 iculate, formed by the branches terminating in slender pedunculate heads: 

 peduncles somewhat thickened above, 2 to 3 cm. long : heads cylindrical or 

 somewhat spindle-shaped, 1 to 1|- cm. long, about 12-flowered ; involucre 

 greenish purple, obtusely 3-4-dentate, often split down the side to one 

 third its entire length ; rays three, bright yellow, including the achenes 



14 mm. long, tube somewhat angular, puberulent on the angles, the ex- 

 panded portion unequally 3-lobed, about twice as broad as long ; disk- 

 flowers polygonal, puberulent : pappus variable, usually of 6 unequal 

 scales, 2, 3, 4, or even 5 of the scales hispidulous, long acuminate-aris- 

 tate, the others short linear-oblong or spatulate, obtuse ; achenes appressed- 

 puberulent, about 7 mm. long. — Collected by C. G. Pringle, Pedigral 

 (lava beds), Valley of Mexico, altitude 2,300 m., 12 October, 1896, 

 DO. 6592. In general habit closely resembling T. foetidissima, DC, 

 differing, however, in the number of the ray-flowers, the character of the 

 same, and also in the character of the pappus. 



Cacalia suffulta. Stems 2 to 3 m. high, terete, sulcate-striate, 

 purple, glabrous, leafy throughout : lower leaves orbicular-ovate, cordate, 



15 to 18 cm. long, 18 cm. or more broad, palmately nerved, 9-11-lobed, 

 mucronate-denticulate, above glabrous, below hirsutish on the strongly 

 reticulated veins; petioles 10 to 12 cm. long; upper cauline leaves con- 

 siderably smaller, 5 to 8 cm. long, equally broad, puberulent on the veins 

 above (becoming glabrous), hirsutish on the veins and nerves beneath, 

 becoming gradually reduced above to the sessile foliar bracts of the sub- 

 corymbose inflorescence : outer clusters of the corymb on long naked 

 striated purple peduncles: heads large, 2 to 2^ cm. high, about 2 cm. in 

 diameter, subtended and rather closely enveloped by ovate-oblong obtuse 

 sessile bracts : involucre about 2-seriate ; scales oblong, obtuse, 10 to 

 14 mm. long, 3 to 4 mm. broad, greenish purple, glabrous, somewhat 

 keeled on the back, much thickened at the base, apex often ciliated : 



