96 PROCEEDINGS OF THE AMERICAN ACADEMY. 



clasping rather than decurrent leaves, the less lanate-tornentose nature of 

 the under leaf-surface, the more glandular character of stem and foliage, 

 and finally by the chartaceous, essentially white involucral scales. 



Gnaphalium crenatum. Stem herbaceous, erect, 3 to 4 dm. high, 

 branching from the base, leafy throughout, terete, white-tomentose with 

 glandular-hirtellous hairs intermixed : leaves sessile, semiamplexicaul and 

 often somewhat decurrent, spatulate to linear-lanceolate, 2.5 to 5 cm. 

 long, 2 to 5 mm. broad, acute or mucronate-acute, more or less arachnoid 

 and densely glandular-hirtellous ahove, lanate-tomentose beneath ; mar- 

 gins revolute and mostly crenate : inflorescence a terminal corymbose 

 cyme: heads about 5 mm. high, disposed in rather dense glomerules: 

 involucre pale-stramineous, 4-5-seriate ; scales of the involucre lanceolate, 

 tomentose at the base and greenish along the median line, the outer 

 acuminate, acute, the inner obtusish. — Mexico, State of Jalisco : near 

 Guadalajara, C. G. Pringle, no. 9524 (hb. Gr.). 



The affinity of this species is apparently with G. gracile, and G. 

 stramineum, HBK. 



Gnaphalium jaliscense. Lanate-tomentose or densely arachnoid 

 throughout : stem 5 to 7 dm. high, branched from near the base ; 

 branches arcuate-ascending, slender, usually simple : leaves narrowly 

 oblanceolate to lance-attenuate, 3 to 8 cm. long, 2 to 8 mm. broad, acute, 

 entire, commonly revolute-margined, short-decurrent : heads about 7 mm. 

 high, disposed in few- to several-headed glomerules at the tip of stem and 

 branches : involucre campanulate at least in the dried state ; scales of 

 the involucre white, narrowly ovate to elliptic-oblong, 3 to 5 mm. long, 

 1 to 2 mm. broad, acute or submucronate : flowers numerous : perfect 

 flowers 20 to 30. — Mexico. State of Jalisco : Guadalajara, July, 1886, 

 Dr. Edward Palmer, no. 25G (hb. Gr.) ; gravelly soil near Guadalajara, 

 9 August, 1902, C. G. Pringle, no. 8628 (hb. Gr.). 



Dr. Palmer's plant here cited was placed by the late Dr. Sereno Wat- 

 son with Gnaphalium semiamplexicanle, DC, but with that species it 

 has little in common. G. jaliscense differs from G. semiamplexicaule in 

 having decurrent rather than half-clasping leaves, in having larger and 

 more numerously flowered heads ; and the scales of the involucre are 

 more pointed and more numerously seriate. 



Gnaphalium oaxacanum. Stem and branches densely white 

 lanate-tomentose : basal leaves not seen : stem-leaves sessile, shortly de- 

 current, lance-attenuate, 2 to 5 cm. long, 2 to 6 mm. broad, entire, 

 revolute-margined, arachnoid-tomentose above, densely white lanate-to- 

 mentose heueath, in the later stages becoming more or less recurved: 



