426 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
above except on teeth, 6 to 7 mm. long, the very short tube only 0.5 mm. long; pales 
finely tuberculate-hispidulous above, long-aristate; achenes strongly thickened, 
pilose, 4.5 to 5.5 mm. long; awns 2, lanceolate, acute or aristate-acuminate, unequal, 
1 to 3.5 mm. long; squamellae about 12 to 14, more or less united, lacerate-fimbriate, 
0.3 to 1.2 mm. long. ~ 
TyPE LOCALITY: Mexico. 
ILLUSTRATIONS: Jacq. Pl. Hort. Schénbr. 3: pl. 875. 1798; Lindl. Bot. Reg. 18: pl. 
1519. 1832. 
SPECIMENS EXAMINED: 
CHIHUAHUA: Valley near Chihuahua, 1886, Pringle 768 (N). 
Duranao: Santiago Papasquiaro, 1896, Palmer 420 (N). Tepehuanes, 1906, 
Palmer 277 (N). Durango, 1896, Palmer 690 (N), 691 (N). Rincén, 1895, C. 
& FE. Seler 1145 (N). 
San Luis Potosi: Without definite locality, altitude 1,830 to 2,440 meters, ’ 
1878, Parry & Palmer 456 (N), 459 (N); in 1880, Schaffner (K). 
Tepic: In 1892, Palmer 1851 (N). 
Jauisco: Rio Blanco, 1886, Palmer 900 (N). 
AGUASCALIENTES: Aguascalientes, 1903, Rose & Painter 7755 (N). 
VeERACRUz: Orizaba, Botteri 507 (N); in 1865, Bourgeau 3244 (K). Zacuapan, 
1916, Purpus 7558 (N). Mirador, 1838, Linden 1174 (K). 
Cotma: Manzanillo, 1890, Palmer 1076 (N). Without definite locality, 1891, 
Palmer 1220 (N). 
Mexico (State): Tacubaya, 1865-66, Bowrgeau 152 (K, N). Near Guadalupe, 
1903, Rose & Painter 7273 (N). Valley of Mexico, December 20, 1865, Bour- 
geau 1566 (type collection of 7. tubaeformis var. bourgaeana; K). 
Pursta: Teocalli de Cholula, 1908, Arséne (N). Rancho Posadas, near Puebla, 
1909, Nicolas (N). 
MoreEtos: Valley, Jojutla, altitude 915 meters, 1901, Pringle 9306 (N). 
Oaxaca: Sierra de San Felipe, altitude 2,135 to 2,440 meters, 1894, C. L. Smith 
617 (N). Mountain ridge on west side, valley of Cuicatlan, altitude 1,980 to 
2,400 meters, 1894, Nelson 1899 (N). Maize fields, Cordillera of Oaxaca, 1840, 
Galeottt 2003 (K). 
GUATEMALA: Chupadero, altitude 1,525 meters, 1892, Heyde & Lua 4204 (N). r 
Pacaya, Department of Amatitlin, altitude 1,765 meters, 1890, J. D. Smith 
2390 (N). Santa Rosa, Baja Verapaz, 1904, Cook 233 (N). Huehuetenango, 
1914, Tejada 329 (N). Duefias, 1861, Salvin & Godman (K). Without 
definite locality, 1865, Bernoullt 162, 217 (K). 
This species is closely related to the next, but is generally easily distinguished by 
the long dense pubescence of the involucre and peduncles, the long-aristate pales, 
and the always unlobed leaves. In Oaxaca, according to Galeotti, it is known as 
“camalote.’’ It is known in Mexico also as “acaute” and “acahuale.”’ 
2. Tithonia rotundifolia (Mill.) Blake, Contr. Gray Herb. n. ser. 52: 41. 1917. 
Tagetes rotundifolia Mill, Gard. Dict. ed. 8. Tagetes no. 4. 1768. 
Tithonia uniflora Gmel. Syst. Nat. 1259, 1791. 
Tithonia tagetiflora Desf. Ann. Mus. Hist. Nat. 1: 49. pl. 4. 1802. 
Helianthus speciosus Hook. in Curtis’s Bot. Mag. 61: pl. 8295. 1834. q 
Leighia ? speciosa DC. Prodr. 5: 583. 1836. 
Tithonia aristata Oerst. Naturhist. For. Kjdbenhavn Vid. Medd. 1852: 114. 135°. 
Tithonia heterophylla Griseb. Bonplandia 6: 9. 1858. 
Tithonia speciosa Hook.; Griseb. Cat. Pl. Cub. 155. 1866. 
Tithonia macrophylla 8. Wats. Proc. Amer. Acad. 26: 140. 1891. 
Urbanisol tagetifolius Kuntze, Rev. Gen. Pl. 1: 370. 1891. 
Urbanisol tagetifolius a normalis Kuntze, Rev. Gen. Pl. 1: 370. 1891. 
a 
