ROBINSON & GREENMAN: CONTRIB. GRAY HERBARIUM. 103 
acc. to eae 1. c., 168. — South Mexico, Mirador, Ziebmann, no. 
251; \Chiapas,) Ghiesbreght, no. 572, Caec. and Ed. Seler, no. 
2187 ; Valley of Cordova, Bourgeau, no. 1851; Vera Cruz, Prin- 
gle, no. 6087; Orizaba, Gray; Guatemala, von Tuerckheim, no. 
354 of Mr. J. Donnell Smith’s sets; Costa Rica, Péttier, nos. 3136, 
3735, Tonduz, no. 7 
++ ++ Cuneately winged petioles tending to enlargement and usually auricled 
at the base. 
37. G. catva, Gray. Shaggy-pubescent with long white silky 
hairs: habit as in Zithonia: leaves alternate, broadly ovate, acu- 
minate, abruptly contracted to a and (sometimes obsoletely) 
auriculate petioles: involuer . acad,, 19, 5; 
Tlook. f. and Jacks., Ind. Kew., 1, 1076. Tithonia calva, Sch. Bip. 
in Seemann, 1. ¢., oe Mirasolia calva, Benth. and Hook. f., Gen., 
2, 368; Hemsl., , 168. Sierra Madre, Northern Mexico, See- 
mann, no. 2045; eee Rose, no. 2293. 
var. lancifolia. Stem sparingly hirsute or villous: leaves 
lanceolate. — Tepic, Acaponeta, February, 1895, 7’. ZZ, Lamb, no. 
539. Types in-herb. Gray and herb. U. S. nat. museum. 
DovuBTFUL SPECIES. 
G. connata, Spreng. Syst. 3, 610 (connatum).— Branches 
hispid: leaves oblong, attenuate at either end, connate, hispidulous : 
peduncles terminal, short: foliaceous involucre subsimple. — Brazil, 
ello. A species not mentioned in Martius, Fl. Bras., and probably 
not of this genus. The description is a translation “a the original 
characterization. 
G. microcerHaLa, 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 em. long, | to 
3 em. 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 
