470 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Berlandier, no. 1018; State of Mexico, Bourgeau, no. 1235, Schaffner, 



no. 293, Pringle, nos. 3500, 3896, 9098 ; Cuernavaca, Bourgeca no. 1205. 



2. Leaves green above, niveous-sericeous beneath. 



7. N. Heteropappds, 0. Kuntze, I.e. (1891) as Noccaea. Lagascea 

 Heteropappus, Hemsl. Diag. PI. Nov. 33 (1879). — Mexico, Parkinson, 

 without locality ; hillsides near Morelia, Michoacan, Pringle, no. 4541. 



e. Indumentum of the stem spreading, compound, the sliort glandular hairs 

 much exceeded by a long non-glandular villosity ; leaves ovate-oblong, attenuate, 

 dull and gray-pubescent upon both surfaces, even the upper ones exceeding the 

 internodes. 



8. N. tomentosa. Lagascea tomentosa, Rob. & Greenm. Proc. Am. 

 Acad, xxxii. 43 (1896). — Guerrero, Mexico, between Ayusinapa and 

 Petatlau, B. W. Nelson, no. 2121. 



= = = Leaves oblong-oblanceolate, 4 to 5 times as long as broad, narrowed at the 



base to a distinct petiole. 



9. N. ANGUSTiPOLiA, O. Kuntze, 1. c. (1891) as Noccaea. Lagascea 

 angiistifolia, DC. Prodr. v. 92 (1836). — N. W. Mexico, Seemann ; 

 Duraugo, Palmer, no. 853 (1896) ; Jalisco, Palmer, no. 643 (1886), 

 Pringle, no. 1784. 



++ t-* Glomerules slendor-peduncled, usually raised much above the foliar leaves, 

 at length subglobose, the subtending bracts mostly small and narrow. 



= Teeth of the gamophyllous involucre relatively long and narrow, lance-linear 



to subulate. 



a. Involucres soft-villous. 



10. N. DECiPiENS, O. Kuntze, 1. c. (1891) as Noccaea. Lagascea 

 decipiens, Hemsl. Diag. PI. Nov. 33 (1879), & Biol. Cent.-Am. Bot. ii. 

 140, t. 44, f. 1-4 (1881). — North Mexico in the Sierra Madre, See- 

 mann, DO. 2056; Southwestern Chihuahua, Palmer, no. 145 (coll. of 

 1885); Sonora, at Guaymas, Pa/»2er, no. 256 (coll. of 1887), Alamos, 

 Palmer, no. 401 (1890), La Tinaya, Hartmann, no. 249. 



b. Involucre hirsute. 



11. N. glandulosa. Lagascea glandulosa, Fernald, Bot. Gaz. xx. 

 534 (1895). — W. Mexico, head of Mazatlan River, W. G. Wright, no. 

 1305; Rosario, Sinaloa, Lamh, no. 483. 



= = Teeth of the involucre very short (1 to \\ mm. in length), ovate to deltoid- 

 lanceolate. 



a. Stem and floral branches pubescent to tomentulose. 



12. N. Liebmannii. Lagascea Liehmannii, Sch. Bip. in Klatt, Leo- 

 poldina, xx. 91 (1884). — Leaves soft-pubescent beneath: involucre 



