GREENMAN. — CENTRAL AMERICAN SPERMATOPHYTES. 51 
11 September, 1885, C. G. Pringle, no. 625 (hb. Gr.), distributed as 
“ Artemisia Ludoviciana, Nutt., var.?”; near Lake Santa Maria, 
7 September, 1899, #. W. Nelson, no. 6387 (hb. Gr., and hb. U.S. Nat. 
Mus.). This species is amply distinct from A. Ludoviciana both in the 
character of the foliage and the inflorescence. 
CacaLia PELTATA, HBK., var. Coulteri, n. var. Lower leaves 
peltate, 7-10-lobed with rounded or subcircular sinuses: inflorescence 
8 to 15 cm. in diameter, densely pubescent with jointed villous hairs: 
heads 12—16-flowered. — Mexico. State of Vera Cruz: Real del Monte, 
Th. Coulter, no. 420 (hb. Gr.) ; Mt. Orizaba, August, 1891, Henry E. 
Seaton, without number (hb. Gr.). State of. Mexico: Nevado de 
Toluca, 15 October, 1903, Rose & Painter, no. 7939 (hb. Gr., and hb. 
U.S. Nat. Mus.). 
CigsiuM OCHROCENTRUM, Gray, var. durangense, n. var. Leaves 
pinnatisect ; divisions lance-linear, spine-tipped, at first arachnoid-tomen- 
tulose above but soon glabrate revealing the dark green surface and 
yellowish midvein, densely and permanently white-tomentose beneath. — 
Mexico. State of Durango: about the City of Durango, 1 August, 
1898, #. W. Nelson, no. 4633 (hb. Gr., and hb. U. S. Nat. Mus.). 
Onoseris silvatica, n. sp. An herbaceous perennial about 1 m. 
high: leaves alternate, chiefly basal, runcinate-pinnatifid, short-acuminate, 
acute, unequally sinuate-dentate, arachnoid-tomentulose above, densely 
white-tomentose beneath; terminal segment large, triangular-sagittate, 
1 to 3 dm. long, nearly or quite as broad, palmately nerved, cordate ; 
lateral segments smaller, divaricate or somewhat reflexed, often reduced 
to a more or less continuous wing on the rhachis or petiole : inflorescence 
a naked loose paniculate cyme: peduncle or scape striate-angled, floccose- 
tomentose: heads 2 to 2.5 em. high, 40-45-flowered: involucre sub- 
campanulate, 2 cm. high, tomentulose ; bracts of the involucre 4-seriate, 
the outer shorter: outer flowers of the head bilabiate, producing well- 
developed dark-red or purplish rays: inner or disk-flowers deeply and 
subequally 5-toothed: achenes appressed - sericeous - pubescent. — O. 
paniculata, Klatt, Bull. Soc. Bot. Belg. xxxi. pt. 1, 214, not [ Moc. 
& Sessé] DC.— Costa Rica. “ Foréts des collines de Nicoya,” 
January, 1900, Ad. Tonduz, no. 13,597 (hb. Gr.); “forét de T’Alto 
del Rodeo,” altitude 1100 m., 28 December, 1889, Pittier, no. 1622 
(hb. Gr.); “tailles du Rodeo del Pacaca,” altitude 900 m., 1-2 
January, 1891, Pitter, no. 3312 (hb. Gr.). From 0. Isotypus, 
Benth. & Hook. f. (0. paniculata, [Moc. & Sessé] DC.) this species 
is readily distinguished by having larger more numerously flowered 
