GREENMAN. — SPERMATOPHYTES FROM MEXICO, ETC. 263 
Santa Fé, altitude 3000 m., Pringle, no. 9322 (hb. 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. Cervantesit, DC. |. c.— Mexico. Alaman (hb. DC., photo- 
graph of type inhb. Gr.). State of Mexico: rocky hills, Lecheria, Valley 
of Mexico, 21 km. north of the City of Mexico, altitude 2285 m., 4 July, 
1904, O. G. Pringle, no. 8816 (hb. Gr.). Mr. Pringle states that this 
species grows from 9 to 12 dm. in height. 
P. flexuosum, 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, 
1.5 to 4.5 em. long, 0.5 to 2.2 em. 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 subappressed-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 em. 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. bw . 
phthalmoides, Rob. & Greenm. Proc. Am. Acad. xxxiv. 523 (1899), 
not DC.— Mexico. Federal District: Serrania de Ajusco, altitude 3000 
m., 9 July, 1898, C. 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- 
