90 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
Proc. Amer. acacl., 15, 36.—Northern Mexico, Gregg , no. 382; 
and on limestone hills Carneros Pass, Coahuila, Pringle, no. 2387. 
* * Leaves alternate, larger, subentire. 
2. G. cinerascens, Benth. and Hook. f. Dichotomous under¬ 
shrub with brownish purple soft-pubescent leafy stems terminating 
in compound irregular many headed corymbs : leaves ovate-elliptic, 
5 to 6 cm. long, 3 to 4 cm. broad; the upper oblong, attenuate at 
each end, acute, minutely serrulate, subtriplinerved, pubescent 
above: heads borne on white clavate peduncles: ligules (white ?) 
neutral: achenes glabrous, without pappus. — Gen., 2, 362; 
Hemsl., 1. c., 161. Zaluzania cinerascens , Sch. Bip., Flora, 1864, 
p. 219, whence above desc. is compiled. — S. Mexico, Mineral del 
Monte, Ehrenberg , no. 346. We have not been able to see speci¬ 
mens of this species but from Schultz statement that the corolla is 
cucullate over the achene there can be little doubt that it is to be 
referred to Subg. Calanticaria. 
* * * Leaves lobed, scales of the involucre lance-linear, acute to attenuate. 
3. G. pijstnatilobata, Benth. and Hook. f. Shrub: branches 
covered with a line white at length deciduous pubescence: leaves 
pinnately several-lobed, pale green above, white-tomentulose 
beneath, 3 to 6 cm. long (including the winged petiole), half as 
broad; lateral lobes blunt, the lower large, the upper smaller. — 
Gen., 2, 364; Hemsl., 1. c., 163. Zaluzania pinnatilobata, Sch. 
Bip., Flora, 1864, p. 219.— South Mexico, Tehuacan, Liebmann, 
no. 384, Pringle , no. 6252; Cordillera of Oaxaca, Galeotti, no. 
2124, acc. to Hemsl.; limestone mesas, San Antonio, Oaxaca, Prin¬ 
gle, no. 5731. Mr. E. W. Nelson’s no. 1638 from Oaxaca forms a 
puzzling intermediate between this and the otherwise well-marked 
G. tripartita. 
4. G. tripartita, Robinson and Greenman. Stems smooth and 
glabrous : leaves deeply and palmately 3-parted; segments narrow, 
oblong, acute, often bluntly lobed near the base, the lateral some¬ 
times very short or in upper leaves wanting, paler but green be¬ 
neath: heads numerous, slender-peduncled in an open corymb.— 
Amer. journ. sci., ser. 3, 50, 154.— Oaxaca, Cuicatlan, L. C. Smith, 
no. 239 ; Jayacatlan, P. C. Smith, no. 386. 
5. G. tenuifolia, Benth. and Hook. f. Low shrub, 1 m. or 
more high: leaves numerous, deeply 3-fid or pinnatifid with lobes 
few, linear to lance-linear, acute, green above, finely white pubes- 
