108 PROCEEDINGS OF THE AMERICAN ACADEMY, 
HELIANTHUS PETIOLARIS, Nutt., var. CANESCENS, Gray, Pl. Wright. 
i. 108; Syn. Fl. i. pt. 2, 272. Mr. E. W. Nelson collected near Casas 
Grandes, State of Chihuahua, Mexico, 30 August, 1899, specimens 
under no. 6328 (hb. Gr., and hb. U. S. Nat. Mus.), which, except for a 
slightly more pronounced dentation of the leaves, accord well with the 
type of the above variety. 
The locality not only extends considerably the geographical range of 
the variety canescens, but adds another Helianthus not hitherto recorded 
from Mexico. 
Perymenium macrocephalum. Stout herbaceous perennial, pu- 
bescent throughout with more or less spreading stiff hairs; stem and 
branches mottled with reddish-brown patches: leaves opposite, petiolate, 
ovate, 5.to 10 cm. long, 3 to 7 em. broad, acuminate, acute, rather 
remotely and shallowly dentate, rounded or cuneate at the base, hispid 
above, paler and hirsute-hispid on the conspicuously reticulated veins 
beneath ; petioles 0.5 to 2.5 cm. long, narrowly winged by a continuous 
prolongation of the leaf-blade: heads few, on long peduncles 1 to 10 
em. in length; scales of the involucre 3—4-seriate, ovate to oblong, 
obtuse, externally appressed-pubescent, ciliate, the outer shorter: ray- 
flowers about 13, fertile; rays yellow: disk-flowers numerous: mature 
achenes 4 to 5 mm. long, somewhat roughened on either surface: pales 
of the receptacle conspicuous, especially in the later stages. — Mexico. 
State of Guerrero: limestone mountains above Iguala, altitude 1230 m., 
27 September, 1900, C. G. Pringle, no. 8416 (hb. Gr.). This species 
suggests in some respects Montanoa macrolepis, Rub. & Greenm., but in 
the technical characters it is quite distinct. 
PERYMENIUM RUDE, Rob. & Greenm., Proc. Am. Acad. xxxiv. 526. 
Specimens collected near Tequila, State of Jalisco, Mexico, 5-6 July, 
1899, by Dr. J. N. Rose & Mr. Walter Hough, no. 4749 (hb. Gr., 
-and hb. U. S. Nat. Mus.), agree in all essential details with the original 
specimen, and with the first published description of this species. In the 
above cited number, however, the leaves are often 4 cm. in length, and 
8 cm. in breadth, thus somewhat larger than was indicated in the original 
description. 
SPILANTHES DIsctrorMis, Rob., var. phaneractis, Stems ascend- 
ing, 2.5 to 8 dm. long, rooting at the lower nodes: leaves narrowly 
lanceolate, 8 cm. or less in length, 8 mm. in breadth: peduncles slender, 
7 to 13 em, long: rays conspicuous, sulphur-yellow, 5 to 6 mm. long, 
2 to 3 mm. broad.— Mexico. State of Michoacan: swamps, Zamora, 
altitude 1540 m., 1901, and 24 July, 1902, C. G. Pringle, nos. 9539, 8637 
(hb. Gr.), 
