. 
468 PROCEEDINGS OF THE AMERICAN ACADEMY. 
* Involucres 2-flowered. 
1, N. sirtora, O. Kuntze, Rev. Gen. i. 354 (1891), as Woccaea. 
Lagascea biflora, Hemsl. Diag. Pl. Nov. 83 (1879), & Biol. Cent.-Am. 
Bot. ii. 139, t. 44 (1881). — Mexico, without locality, Parkinson, Salina 
Cruz, C. OC. Deam. 
* * Involucres 1-flowered. 
+ Shrubs or perennial herbs: Mexican. 
++ Flowers large: glomerules sessile or scarcely peduncled, even in age more OF 
ess campanulate, the subtending bracts ovate to lanceolate, large and consplt 
uous: central and southern Mexico. 
= Leaves cordate-clasping at the sessile base. 
2. N. HELIANTHIFOLIA, Cass. Stem pilose: leaves scabrous above, 
scabro-hirtellous beneath. — Dict. Sci. Nat. xxv. 104 (1822), as Noe- 
caea. Lagascea helianthifolia, HBK. Nov. Gen. & Spee. iv. 25 (1820). 
L. macrophylla, Zuce. acc. to Steud. Nomen. ed. 2, ii. 4 (1841): 
Noceaea macrophylla, Zuce. acc. to DC. Prodr. y. 92 (1836). Acapulco, 
Mexico, Humboldt & Bonpland ; Jalisco, Rio Blanco, Palmer, no. 664 
(coll. of 1886) ; Guadalajara, Pringle, no. 1824, in part. 
’ Var. levior. Stem pulverulent-puberulent, destitute of the long 
spreading pilosity characteristic of the typical form: leaves scabrous 
above, scabrous-hirtellous beneath. — Colima, Mexico, Dr. Edw. Palmer, 
no. 1148 (coll. of 1891); Zopelote, Tepic, altitude 615 to 924 m., Lamb, 
no. 561. 
Var. suaveolens. Stem pilose; leaves soft-pubescent beneath. — 
Lagascea suaveolens, HBK. 1. c. (1820). Noceaea suaveolens, Cass. 1. ¢. 
105 (1822). Nocea latifolia, Cerv. in La Llav. & Lex. Nov. Veg: 
i, 31 (1824). Lagascea latifolia, DC. Prodr. v. 92 (1836). — Tama 
lipas, Santa Barbara, Berlandier, nos. 753, 2173; Guanajuato, Duges 
(a form resembling the type) ; Oaxaca, “Nelson, no. 1804, L. C. Smith, 
no. 964; Conzatti & Gonzdlez, no. 558, Holway, no. 3724; a uebla, 
Conzatti, no. 861; Vera Cruz, Mirador, Liebmann, no. 111; Oriza 
Schaffner, Bourgeau, no. 3342, Botteri, no. 499, Gray, Tantoy - 
Ervendberg, no. 317; Chiapas, Ghiesbreght, nos. 146, 571 (form with 
leaves exceptionally pubescent almost lanate beneath) ; Guatemala, J. D- 
Smith’s nos. 2410, 4227, 
= = Leaves short-petioled, ovate, 2 or 3 times as long as broad: flowers red oF 
purple. 
a. Indumentum of the stem spreading, dense, uniform in length, partially glandu- 
lar: leaves elliptic, obtusish, remotely denticulate. 
8. N.w. sp. [?]. Branches lignescent, covered throughout by 4 eee 
_ dense spreading pubescence, a part of the hairs glandular, others ¢ 
