164 PROCEEDINGS OF THE AMERICAN ACADEMY. 



flexed: ray-flowers about 12; ligules small, narrow; disk-flowers much 

 exceeding the involucre : achenes winged, pubescent, constricted at the 

 summit; awns about as long as the body; squamellae small, numerous. 



— Bull. Soc. Bot. Belg. xxxi. 203 (1892). — Z. dulcis, Coulter in J. D. 

 Smith, Enum. PL Guat. iv. 86 (1895), not Bot. Gaz. xvi. 99 (1891). 



— Central America. Specimens examined, — Costa Rica : near San 

 Mateo, Pittier, no. 7027 ; San Jose, Tonduz, no. 12,967 ; Aragon, Rio 

 Turrialba, Pittier, no. 13,241 (no. 7504 of J. D. Smith's distrib.) ; San 

 Miguel, Biolley, no. 7423 ; Rio Zhorquiu, Tonduz, no. 8532 ; Talamanca, 

 Pittier, no. 8676 ; Boca de Zhorquin, in thickets, Tonduz, no. 8699 ; 

 Atirro, Carthago, J. D. Smith, no. 4872 ; Rio Turrialba, Carthago, ./. D. 

 Smith, no. 6610. Guatemala: Rio Samala, Retalhuleu, J. D. Smith, 

 no. 2854. 



■*- ■*- Body of the achenes rounded (as in Wedelia) not strongly angled, but winged, 

 strongly constricted near the summit; awns usually short. 



++ Shrubs or perennial herbs. 



39. Z. hispida, Gray. Branching shrub, about 1 m. high, strigose- 

 hispid: leaves rhomboid-lanceolate or ovatedauceolate, acute at the base, 

 sessile or nearly so, sparingly dentate or subhastately lobed, generally 

 strigose on both sides : peduncles terminal, solitary or occasionally in a 

 cyme of 3, very long; heads about 1 cm. high; involucre 2 -seriate, 

 cylindraceous-campanulate, generally less than 1 cm. wide ; outer bracts 

 lanceolate, subfoliaceous : ligules broad, conspicuous : achenes variable 

 as to wing and size ; those of the ray-flowers commonly 3-angled, with 

 2 or occasionally 3 wings ; achenes of the disk-flowers broadly 2-winged 

 or with the wings reduced to 2 upwardly directed auricles ; pappus sepa- 

 rated from the body of the achene by a strong constriction or neck bearing 

 a somewhat expanded row of very short squamellae and 2 or 3 short awns. 



— Proc. Am. Acad. xix. 10 (1883). Z. texana, Gray, PI. Wright, ii. 

 112 (1852). Stemmodontia scaberrima, Cass. Diet. Sci. Nat. xlvi. 407. 

 ? Wedelia hispida, HBK. Nov. Gen. et Spec. iv. 215 (1820). Wirtgenia 

 texana, Sch. Bip. in Seeraann, Bot. Voy. Herald, 304 (1852-57). 



Viguiera longipes, Coulter, Contrib. U. S. Nat. Herb. i. 41 (1890). — 

 Southwestern United States to Central Mexico. Specimens examined, 



— Texas : Austin, Hall, no. 341 ; Crocket County, Recerchon, no. 1542 ; 

 southwestern part of the state, Wright, no. 354, Palmer, no. 630; Rio 

 de Medina, Berlandier, no. 2460 ; Arroyo de Colorado, Berlandier, no. 

 2553 ; Nueces County, Heller, no. 1479 ; New Braunfels, Lindheimer, 

 no. 436, Mex. Bound. Surv. no. 590; Kerr County, Brag, no. 199; 



