228 THE JOURNAL OF BOTANY 
sequaliter 2-aristata Q-alata ala exteriore angustissima interiore 
latiore obliqua ambabus cum aristis confluentibus. ntherew basi 
obtuse sagittate. Styli rami acuti vix appendiculati hirtelli.— 
Type, Zexmenia (Otopappus) tequilana Gray.—Southern Mexico. 
, cm. wide, on tuberculate- 
strigillose or -strigose marginless petioles 6-22 mm. ong. Heads 
1-1-6 cm. wide, rather numerous in axillary and terminal 3-15- 
ra. m 
8 cm. long, shorter than the leaves; pedicels naked or 
bracteolate, tuberculate-strigillose to hispid-pilose, 3-18 mm. long. 
Disk hemispheric, 6-5-8 mm. ong, mm. wide. Involucre 
4-sub-5-seriate, regularly graduated, 3-5-4 mm. high; phyllaries 
canescent-strigose, oblong, indurated and chartaceous-coriaceou 
narrowly winged on the outer, broadly and obliquely on the inner 
angle, the wings adnate to the very unequal pappus awns. 
Squamellaceous corona none. 
utH Mexico; variable. Divisible into two not strongly 
marked varieties :— 
Var. GENUINA, n. var. Foliis infra sparse hispidulo-strigillosis 
supra tuberculato-strigillosis ; caule tuberculato-strigilloso. — 
Zexrmenia (Otopappus) tequilana Gray! in Wats. Proc. Am. Acad. 
xxii. 425 (1887), pro parte (as to Palmer, 359). Otopappus 
tequilanus (Gray) Rob. Proc. Am. Acad. xliv. 622 (1909).—Jaxisco : 
in ravines and along hillsides, Tequila, 1886, Palmer, 359 (cotype 
coll.: Brit. Mus., Kew); mountains above Etzatlan, October 22nd, 
1903, Pringle, 11555 (Kew). 
aTA (Wats.), n.comb. Foliis infra dense sub- 
acuminatus Wats. Proc. Am. Acad. xxvi. 140 (1891). O. tequilanus 
(Gray) Rob. var. acuminatus (Wats.) Rob. 1. c. xliv. 622 (1909).— 
coll. of Z. tequilana : Brit. Mus., Ke Bol 
19th, 1907, Hose, 2927 (Kew). Pringle, 3837 (slopes of barranca n 
