ROBINSON & GREENMAN : OONTRIB. GRAY HERBARIUM. 103 
acc. to Hemsl., 1. c., 108. — South Mexico, Mirador, Liebmann , no. 
251 ; Chiapas, Ghiesbreght , no. 572, Caec. and Ed. Seler, no. 
2187 ; Valley of Cordova, Bourgeon , no. 1851 ; Vera Cruz, Prin¬ 
gle, no. 6087 ; Orizaba, Gray ; Guatemala, von Tuerckheim , no. 
354 of Mr. J. Donnell Smith’s sets; Costa Rica, Pittier , nos. 3136, 
3735, Tonduz , no. 7196. 
++ ++ Cuneately winged petioles tending to enlargement and usually auricled 
at the base. 
37. G. calya, Gray. Shaggy-pubescent with long white silky 
hairs: habit as in Tithonia : leaves alternate, broadly ovate, acu¬ 
minate, abruptly contracted to winged and (sometimes obsoletely) 
auriculate petioles: involucre hirsute. — Proc. Amer. acad., 19, 5; 
Hook. f. and Jacks., Ind. Kew., 1, 1076. Tithonia calva, Sell. Rip. 
in Seemann, 1. c., 305. Mirasolia calva , Benth. and Hook, f., Gen., 
2, 368; Hemsl., 1. c., 168. Sierra Madre, Northern Mexico, /See¬ 
mann, no. 12045 ; Durango, Rose, no. 2293. 
var. lancifolia. Stem sparingly hirsute or villous : leaves 
lanceolate. — Tepic, Acaponeta, February, 1895, P. II. Bomb, no. 
539. Types in herb. Gray and herb. U. S. nat. museum. 
Doubtful species. 
G. connata, Spreng., Syst. 3, 610 [connatum) . — Branches 
hispid : leaves oblong, attenuate at either end, connate, hispiduious : 
peduncles terminal, short: foliaceous involucre subsimple.— Brazil, 
iSello. A species not mentioned in Martius, FI. Bras., and probably 
not of this genus. The description is a translation of the original 
characterization. 
G. microcepiiala, Less. Herb with 3-nerved leaves, small 
cylindrical discoid short-pedicelled heads : leaves petiolate, opposite, 
paler beneath, oblong-ovate, long-acuminate, very obtuse at the 
base, sharply serrate, hirsute-hispid, scabrous, 3.1 to 5 cm. long, 1 to 
3 cm. broad: scales of the involucre passing from flat semilanceo- 
late foliaceous bracts, hirsute on the midnerve, to longer (about 
4 mm. long) and broader dry linear shortly acuminate glabrous 
bracts, fimbriate-dentate at the apex, scarious on the margin, and 
traversed by green nerves: branches opposite, diverging at the 
apex into 3 short filiform branchlets bearing several heads (4 mm. 
long) above. — Linnaea, 5, 153, whence the foregoing description is 
