50 PROCEEDINGS OF THE AMERICAN ACADEMY. 



broad, 3 or 4 inches long, glabrate above, floccose-tomentulose beneath, 

 not narrowed at the base but decurrent upon the stem for nearly two 

 inches in two broad wings, these sharply toothed especially near the 

 lower end : bracts lance-linear : pedicels spreading, 4 to 15 lines in length, 

 bearing several subulate bractlets : heads about 50, erect, half inch long 

 and including the 8 or 10 spreading oblong golden-yellow rays, about 9 

 lines in diameter: involucre calyculate, about 20-phylloiis ; scales atten- 

 uate ; disk-flowers 40 to 45, shortly 5-dentate : ligules 3 to 3i- lines long, 

 1 to 1-J- lines broad, 4-nerved. — Collected by C. G. Pringle, on hills, at 

 Las Sedas, Oaxaca, altitude 6,000 feet, 3 December, 1895, uo. 6282. 



G-ochnatia Smitliii. Shrub ? leaves clustered near the ends of 

 the branches, oblong, entire, obtuse, cuneate at the base, thickish, grayish 

 and covered with a very fine short toraentum above (perhaps later glabres- 

 cent), much paler, tomeutose and veiny beneath : heads in numerous 

 slender close terminal globose glomerules, 8 lines long, about 6-flowered; 

 involucres green, very slender, and gradually tui'binate ; the scales in 

 many (8 to 10) series, extending as it were down upon the pedicels, ovate 

 to lanceolate, obtuse, pubescent : style-branches short, flattened, rounded : 

 divisions of the corolla subequal, narrow: acheue subvillous, 1^ to 2 lines 

 in length. — Collected by L. C. Smith, on hills of Cuicatlan, 30 April, 

 1895, at 3,000 feet altitude; also by E. W. Nelson along road from 

 Totolapa to San Carlos, altitude 3,000 to 3,800 feet, April, 1895, no. 

 2546. Noteworthy for its very long slender closely imbricated involu- 

 cres and globose inflorescences, the latter about 2 inches in diameter. 



Perezia Cnemavacana. Glabrous : stems clustered, 2 to 3 feet 

 high, striate-angulate, purplish, leafy : leaves oblong, obtuse and mucron- 

 ulate at the apex, scarcely narrowed to the rounded subsessile base, 

 sharply denticulate with pungent teeth, reticulated and lucidulous on 

 both surfaces, 2 to 2h inches long, 9 lines broad, ascending, imbricated, 

 the uppermost gradually reduced : heads few, very large, about 30- 

 flowered, 12 to 15 lines long and broad, terminal on long many-bracted 

 peduncles : involucre turbinate, multiseriate ; the scales greenish, silky- 

 ciliate, the inner ones oblong, obtusish, 1^^ to 2 lines broad near the 

 summit, the outer gradually smaller and extending as subulate spreading 

 bracts some distance down the peduncle : corollas lilac in dried state, 9 

 lines in length : pappus tawny ; achenes puberulent, 31- lines long. — A 

 handsome species collected by C. G. Pringle, at Cuernavaca, altitude 

 7,000 feet, no. 6196. 



Perezia umbratilis. Habit of P. niidicaulis : root horizontal, send- 

 ing off numerous stout fibres ; caudex multicipital, tufted with sordid 



