GREENMAN. — SPERMATOPHYTES FROM MEXICO, ETC. 263 



Santa Fe, altitude 3000 m., Pringle, no. 9322 (lib. Gr.) ; Bourgeau, no. 

 378 (hb. Gr.). State of Mexico: Flor de Maria, Pringle, no. 3169 

 (hb. Gr.). State of Jalisco : granitic hills near Guadalajara, Pringle, 

 no. 8624 (hb. Gr.). 



P. Cf.rvantesii, DC. 1. c. — Mexico. Alaman (hb. DC, photo- 

 graph of type in hb. Gr.). State of Mexico : rocky hills, Lecheria, Valley 

 of Mexico, 21 km. north of the City of Mexico, altitude 2285 m., 4 July, 

 1904. C. G. Pringle, no. 8816 (hb. Gr.). Mr. Pringle states that this 

 species grows from 9 to 12 dm. in height. 



P. flexuosurn, n. sp. An herbaceous perennial : stems decumbent or 

 ascending from a ligneous base, slender, flexuous, 1.5 to 6 dm. in length, 

 green or purplish, striate, pubescent with appressed or somewhat spread- 

 ing stiffish hairs : leaves opposite, sessile or nearly so, ovate to lanceolate, 

 l.o to 4.5 cm. long, 0.5 to 2.2 cm. broad, acute, dentate, usually abruptly 

 contracted at the base sometimes to a very short petiole, hirsute-hispid on 

 both sides especially on the midrib and nerves beneath, intermixed on 

 the surface with shorter finer strigillose hairs, 3-7-nerved from or just 

 above the base : heads solitary, including the rays 2 to 3 cm. in diameter, 

 borne on long naked peduncles terminating the stem : peduncles 4 to 8 

 cm. in length, densely snbappressed-canous-pubescent towards the head : 

 involucre subuniseriate ; bracts of the involucre lanceolate to lance-oblong, 

 obtuse or obtusish, hirsute with spreading hairs: ray-flowers about 8; 

 rays oblong, including the short tubular portion about 1 cm. long, 4 to 5 

 mm. broad, yellow : pales of the receptacle often purplish-tipped : disk- 

 flowers about equalling or slightly exceeding the involucre : pappus of 

 both ray- and disk-flowers much reduced, consisting of a few very 

 minute setae and a single long awn or seta borne on the inner or pos- 

 terior angle of the achene : achenes slightly pubescent above. — P. bu- 

 phthdhnoides, Rob. & Greenm. Proc. Am. Acad, xxxiv. 523 (1899), 

 not DC. — Mexico. Federal District : Serrania de Ajusco, altitude 3000 

 m., 9 July, 1898, O. G. Pringle, no. 7636 (hb. Gr.). 



This species differs from P. buphthalmoides, DC, in having lanceolate 

 to ovate rather than eliptic-lanceolate leaves, and the same are as a rule 

 more numerously dentate and less conspicuously nerved ; the pubescence 

 on the involucre is of spreading not appressed hairs ; and the pappus is 

 much more reduced. 



Bidens Pringlei, n. sp. Perennial : stems ascending from a ligneous 

 base, 3 to 4.5 dm. in length, green or slightly purplish, nearly or quite 

 glabrous below, pubescent above with short canous subappressed or some- 

 what spreading hairs : leaves, except the uppermost, petiolate, bi-tripin- 



