BLAKE—REVISION OF TITHONIA. 497 
Urbanisol tagetifolius 8 speciosus Kuntze, Rev. Gen. Pl. 1: 370. 1891. 
Urbanisol aristatus Kuntze, Rev. Gen. Pl. 1: 371. 1891. 
Urbanisol heterophyllus Kuntze, Rev. Gen. Pl. 1: 371. 1891. 
Tithonia vilmoriniana Pampanini, Bull. Soc. Bot. Ital. 1908: 133. 1908. 
Stoutish erect branched annual, up to 2 meters high; stem pale or purplish, striatu- 
late, the younger parts densely pilosulous or canescent with rather short soft spreading 
hairs with slightly enlarged bases, in age subglabrate; leaves alternate, the blades 7 to 
27 cm. long (excluding the cuneate decurrent base), 4 to 19.5 cm. wide, ovate to 
deltoid-ovate, three-lobed near the middle with subcaudate lobes or entire, acuminate, 
abruptly cuneate-decurrent into the petiole from a rounded or slightly cordate base, 
serrate with depressed-deltoid teeth, thin, 3-nerved, hispid-pilose on both sides along 
the veins with slightly harsh hairs and rather densely tuberculate-hispidulous between 
them, gland-dotted and slightly paler beneath; petioles scarcely margined below, 
spreading-pilose, 2 to 14 cm. long; peduncles striatulate, pubescent like the stem but 
in age glabrate except just below the heads, usually fistulose above, naked or with a. 
few leafy bracts, 30 cm. long or less; heads 4 to 8 cm. wide; disk in anthesis 1.5 to 2 cm, 
high, 2 to 3 cm. thick, in fruit 2 to 3.5 cm. thick; involucre 2-seriate, subequal or 
obgraduated, 1.3 to 2.8 cm. high, the outer phyllaries ovate to ovate-oblong or some- 
times lanceolate, acute or acuminate, finely subcanescent-pilosulous, in age sometimes 
subglabrate, indurate, pale, and multistriatulate about to the middle, the herbaceous 
apex reflexed or loose, the inner similar but usually much shorter, and with shorter, 
less herbaceous apex; rays 9 to 13, golden-yellow or orange, 2 to 2.5 cm. long; disk 
corollas yellow, slenderly tubular, puberulous especially at base of throat and on the 
teeth, 9 mm. long, the throat strongly dilated at maturity, the tube 1 to 1.5 mm. long; 
pales stiff, lanceolate, cuspidate-acuminate, striatulate, hispidulous above, the outer 
and sometimes the inner becoming purplish above, 1.2 to 1.8 cm. long; achenes sub- 
quadrangular, often striate, blackish or mottled, appressed-pilose or ascending-pilose , 
6 to 7 mm, long; awns 2, easily deciduous, minutely strigillose, unequal, 4 to 6.2 mm. 
long; squamellae firm, united nearly or quite to apex, irregularly dentate, spinulose- 
at apex, 2 to 2.2 mm. long. 
TYPE LOCALITY: Veracruz. 
Inuustrations: Lam. Tabl. Encycl. 3: pl. 708. 1798; Ann. Mus. Hist. Nat. 1: 
pl. 4. 1802; Lindl. Bot. Reg. 7: pl. 591. 1822; Curtis’s Bot. Mag. 61: pl. 8295, 1834. 
SPECIMENS EXAMINED: 
Coauutta: Vicinity of Saltillo, 1898, Palmer 558 (N). 
Teprc: Cuesta de San Luisito, Sierra Madre, altitude 1,370 meters, 1905, Gold- 
smith 168 (G). 
Jauisco: Barranca of Tequila, 1893, Pringle 4601 (G, N). Barranca near 
Guadalajara, September 25, 1889, Pringle 2798 (type collection of T. 
macrophylla; G, N). Near Guadalajara, 1903, Rose & Painter 7405 (N).. 
On road between Bolafios and Guadalajara, 1897, Rose 3053 (G, N). 
Veracruz: Houstoun (type of Tagetes rotundifolia; B). 
Couma: Colima, 1891, Palmer 1250 (N). 
Guerrero: Plain of Iguala, altitude 730 meters, 1900, Pringle 9058 (G, N).. 
Acapulco, Sinclair (K); in 1894-95, Palmer 631 (N). 
Yucatdn: Gaumer 899 (N). 
GUATEMALA: Mazatenango, altitude 330 meters, 1905, Kellerman 5139 (N). Im 
cultivated field, Gualdn, altitude 125 meters, 1905, Deam 333 (N). Escuintla, 
altitude 335 meters, 1890, J. D. Smith 2380 (N), 2385 (N). San Sebastidn, 
altitude 305 meters, 1891, Shannon (J. D. Smith, no. 596; N). 
Satvapor: Vicinity of Izalco, altitude 400 to 800 meters, 1907, Pittier 1976 (N). 
San Salvador, 1905, Velasco (J. D. Smith, no. 8869; N). Without definite: 
locality, Renson 19 (N). 
Nicaraaua: Granada, 1870, Lévy 279 (K). Realejo, Sinclair (K). 
