576 PROCEEDINGS OP THE AMERICAN ACADEMY. 



plant about 1 cm. high. — Collected by C. Sartorius in Vera Cruz, alti- 

 tude 2,700 m., April, 1856; and by C. G. Pringle, Serrania de Ajusco, 

 Federal District, altitude 2,700 m., 23 May, 1898, no, 6859. 



A species resembling in habit B. vamiflora, var. squarrulosa, Gray, 

 but having larger and more numerously flowered heads, and a longer 

 pappus, also related apparently to B. squarrosa, HBK., from which, 

 however, it is distinguished by the entire absence of the squarrose char- 

 acter of the iuvolucral scales. Only staminate plants were collected 

 by Sartorius, yet the specimen in herb. Gray in the inflorescence, foliar 

 and involucral characters, agrees so closely with Mr. Pringle's specimens 

 that the writer has no hesitation in referring both to the above hitherto 

 unpublished species. 



Desman thodium lanceolatum. Herbaceous, perennial (?) : stems 

 1 to nearly 2 m. high, freely branching above, striate, glabrous, purplish ; 

 internodes much exceeding the leaves : leaves lanceolate to lance-ovate, 

 acuminate, acute, 5 to 10 cm. long, 2 to 4 cm. broad, narrowed below into 

 a subpetiolate base, sharply and somewhat unequally dentate with promi- 

 nent and moi*e or less divaricately spreading teeth, essentially glabrous 

 u^jon either surface, paler beneath, margins ciliate-hispid : heads termi- 

 nating the branches in sessile dense glomerules disposed in a cymose-pan- 

 icle : bracts broadly ovate, acute, glabrous ; margins whitish or subscarious : 

 fertile achenes elliptic-oblong, narrowed at either end, 3 mm. long, black, 

 shining. — Collected by C. G. Pringle, on mountains above Cueruavaca, 

 State of Morelos, altitude 2,100 m., 9 August, 1898, no. 6940. 



This species is similar in habit and inflorescence to D. ovatuvi^ Benth., 

 but easily distinguished by the lanceolate sharply dentate leaves, and by 

 larger and less obovate achenes. 



Lepachys columnaris, Torr. &. Gray, var. pulcherrima, Torr. & 

 Gray, Fl. ii. 315 ; Gray, Syn. Fl. i. pt. 2, 264. Obeliscaria pidclierrima, 

 DC. Prodr. V. 559. Ratibida columnaris, var. pulcherrima, Don in 

 Sweet, Brit. Fl. Gard. n. s. iv. t. 361. 



To this well marked variety, characterized by the brown-purple rays 

 more or less bordered with yellow, the following Mexican specimens may 

 be referred. — Coahuila, Carrizilos, 28 May, 1847, Gregg, no. 60, Palmer, 

 no. 717 (coll. of 1880) ; Nuevo Leon, 28 September, 1897, Bose, no. 

 3077. 



Bidens decumbens. Stems decumbent, 1.5 to 3 m. long, tetragonal, 

 striate, glabrous except at the nodes, purplish : leaves simple and broadly 

 ovate, oblong-ovate to obovate, or pinnately 3-parted (the terminal di- 

 vision often rhombic-ovate, the lateral divisions obovate, unequal at the 



