90 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Proc. Amer. acad., 15, 36.— Northern Mexico, Gregg, no. 382; 
and on limestone hills Carneros Pass, Coahuila, Pringle, no. 2387. 
fii 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 em. 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., |. ¢., 161. Zaluzania cinerascens, Sch. Bip., Flora, 1864, 
p. 219, whence above dese. 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. prynatrtopatTa, Benth. and Hook.f. Shrub: branches 
covered with a fine white at length deciduous pubescence: leaves 
pinnately several-lobed, pale green aboye, white-tomentulose 
beneath, 3 to 6 em. long (including the winged petiole), half as 
broad; lateral lobes blunt, the lower large, the upper smaller. — 
Gen., 2, 364; Hemsl., l. ¢., 163. Zaluzania pinnatilobata, Sch. 
Bip., Flora, 1864, p. 219.— South Mexico, Tehuacan, Liehmann, 
no. 384, Pringle, no. 6252; Cordillera of Oaxaca, Galeotti, no. 
2124, acc. to Hemsl.; limestone mesas, San Antonio, Qaxaca, Prin- 
gle, no. 5731. Mr. E. W. Nelson’s no. 1638 from Oaxaca forms 4 
puzzling intermediate between this and the otherwise well-marked 
G. tripartita. ane ee eer : 
4. G, rripartira, Robinson aid 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, Z. C. Smith, 
no. 239; Jayacatlan, LZ. C. Smith, no. 386. 
ZY 5. G. renvrroria,~ Beni Sa” Hook". Low shrub, 1 m. oF 
_ 7 more high: leaves numerous, deeply 3-fid or pinnatifid with lobes 
few, linear to lance-linear, acute, green above, finely white pube> 
