48 PROCEEDINGS OF THE AMERICAN ACADEMY. 
beneath, and slightly lucid but finely scabrous-puberulent above. The 
species, to judge from characters, must be near V. Seemannii, Schz, 
ip. 
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 24 
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, 1899, 
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 1(—3)-nerved, rather pale green, finely ciliated toward the base: 
heads small, closely aggregated into terminal solitary or corymbose 
paniculate glomerules ; these simulating the normal involucrate heads of 
the order: glomerules 6 to 8 lines in breadth, subtended bya few short 
recurved foliaceous bracts, and containing 30 or more heads: involucral 
scales 3 to 4 in each head, hyaline: ray-flower solitary, conspicuous, 24 
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 glomerata, 
Rob. & Seaton, based on Mr. Pringle’s nos. 4289 and 5006, and published 
in Proc. Am. Acad. xxviii. 109, is identical. 
