48 PROCEEDINGS OP THE AMERICAN ACADEMY. 



beneath, and slightly lucid but finely scabrous-puberulent above. The 

 species, to judge from characters, must be near V. Seemannii, Schz, 

 Bip. 



Dahlia tenuis. Root a cluster of 6 or 8 stout fibres, each enlarged 

 and tuberiform in the middle : stem single, erect, very slender, 1 to 2^ 

 feet high, simple below, covered with a short and dense pubescence, 

 almost tomentulose : leaves small for the genus, pinnate to bipinnate, 

 somewhat deltoid in general outline, on slender divaricately spreading 

 petioles of nearly their own length ; leaflets lanceolate, acute or acumi- 

 nate at both ends, finely and sharply serrate or irregularly 2-3-lobed, 

 green and nearly or quite glabrous above, pale and finely pubescent 

 beneath, 8 to 12 lines in length, 3 to 4 lines in breadth: heads few and 

 subcorymbose, or even solitary, including the rays 1^ to 2 inches in 

 diameter : outer involucre of about 6 narrow thickish obtuse bracts, 

 reflexed during anthesis ; the inner scarious bracts lance-oblong, about 6 

 lines in length : rays about 8, pistiliferous. — Collected by E. W. Nelson, 

 18 miles southwest of city of Oaxaca, altitude 7,500-9,500 feet, 10 to 

 20 September, 1894, no. 1364; also by C. G. Pringle, Sierra de Clavel- 

 linas, altitude 9,000 feet, 27 October, 1894, no. 5807; and by L. C. 

 Smith, on mountains of Telixtlahuaca, altitude 7,500 feet, 27 July, 1895, 

 no. 481. 



Flaveria vaginata. Perennial with stout lignescent root : stems 

 several, ascending from a decumbent or even prostrate somewhat branched 

 base, terete, striated, purplish, with bilineate short grayish woolly pubes- 

 cence, leafy above, naked below except for the persistent and sheathing 

 bases of the fallen leaves : internodes very short : leaves linear-subulate, 

 clasping at the base, very gradually attenuate, often fascicled in the 

 axils l(-3)-nerved, rather pale green, finely ciliated toward the base: 

 heads small, closely aggregated into terminal solitary or corymbose- 

 paniculate gloraerules ; these simulating the normal involucrate heads of 

 the order: glomerules 6 to 8 lines in breadth, subtended by a few short 

 recurved foliaceous bracts, and containing 30 or more heads : involucral 

 scales 3 to 4 in each head, hyaline : ray-flower solitary, conspicuous, 2i 

 lines long, with oblong slightly 2-3-toothed yellow ligule : disk-flowers 

 5 to 7, yellow: achenes black, lucid, about 10-nerved. — Collected by 

 E. W. Nelson between Coixtlahuaca and Tamazulapam, Oaxaca, altitude 

 7,000 to 7,700 feet, 12 November, 1894, no. 1933. 



Florestina pedata, Cass. With this species, Schkuhria gJomerata, 

 Rob. & Seaton, based on Mr. Pringle's nos. 4289 and 5006, and published 

 in Proc. Am. Acad, xxviii. 109, is identical. 



