468 PROCEEDINGS OF THE AMERICAN ACADEMY. 



* Involucres 2-flowered. 



1. N. BiFLORA, 0. Kuntze, Rev. Gen. i. 354 (1891), as Noccaea. 

 Lagascea bijlora^ Hemsl. Diag. PI. Nov. 33 (1879), & Biol. Cent.-Am. 

 Bot. ii. 139, t. 44 (1881). — Mexico, without locality, Parkinson, Salina 

 Cruz, C. C. Deam. 



* * Involucres 1-flowered. 

 -t- Shrubs or perennial herbs : Mexican. 

 ++ Flowers large: glomerules sessile or scarcely peduncled, even in age more or 

 less campanulate, the subtending bracts ovate to lanceolate, large and conspic- 

 uous : central and southern Mexico. 



= Leaves cordate-clasping at the sessile base. 



2. N. HELiANTHiFOLiA, Cass. Stem pilose : leaves scabrous above, 

 scabro-hirtellous beneath. — Diet. Sci. Nat. xxv. 104 (1822), as I^oc- 

 caea. Lagascea helianthifolia, HBK. Nov. Gen. & Spec. iv. 25 (1820). 

 L. 7nacrophylla, Zucc. ace. to Stead. Nomen. ed. 2, ii. 4 (1841). 

 Noccaea macrojjhijlla, Zucc. ace. to DC. Prodr. v, 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). Noccaea suaveolens, Cass. 1. c. 



105 (1822). Nocca latifoUa, Cerv. in La Llav. & Lex. Nov. Veg. 



i. 31 (1824). Lagascea latifolia, DC. Prodr. v. 92 (1836). — Tamau- 



lipas, Santa Barbara, Berlandier, nos. 753, 2173 ; Guanajuato, Duges 



(a form resembling the type) ; Oaxaca, Nelson, no. 1804, L. C. Smith, 



no. 964; Conzatti & Gonzalez, no. 558, Holway, no. 3724; Puebla, 



Conzatti, no. 861 ; Vera Cruz, Mirador, Liehmann, no. Ill ; Orizaba, 



Schaffner, Bourgeau, no. 3342, Botteri, no. 499, Gray, Tantoyuca, 



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 or 



purple. 



a. Indumentum of the stem spreading, dense, imiform in length, partially glandu- 

 lar : leaves elliptic, obtusish, remotely denticulate. 



3. N. N. sp. [?]. Branches lignescent, covered throughout by a fine 

 dense spreading pubescence, a part of the hairs glandular, others of 



