ROBINSON & GREENMAN: CONTRIB. GRAY HERBARIUM. 107 
3—4-seriate in both his drawings and in a single authentic head _pre- 
served: in a pocket on one of the sheets of drawings. In the 
arrangement of species 7. galeottii should, accordingly, be inserted | 
where 7. tuberosa has been placed. 
T. iwpricata, Sch. Bip. in Klatt, Flora, 1885, p. 202. 7”. petro- 
phila, Rob. and Greenm. l.c., 5. The authentic specimen of 7’ 
imbricata in the Klatt eiknsion is very poor, but sufficient to 
show with a fair degree of certainty the identity of 7. petrophila. 
The involuecre is here also 3-4-seriate, not biseriate as we had 
supposed. 
T. verticrttata, Klatt, Leopoldina, 25, 107 (1889). This 
South American species, omitted from our revision, is the only 
member of the genus with verticillate leaves. In the arrangement 
of the species it may well be placed in subgenus Eutridax after 7’ 
angustifolia. 
. EHRENBERGII, Sch. Bip. in Klatt, lc. Kilatt’s drawing of 
this species shows a plant with long internodes and habit o 
dubia, but the achenes preserved in the Klatt herbarium have the 
pappus rather of a Calea than a Tridax. The species must remain 
doubtful until more complete material can be seen. 
Mikanta onrvacra, Klatt, Bull. soc. bot. Belg., 31, 195, — An 
examination of the type in the Klatt herbarium shows it to be 
Pittier’s no. 4933, not 4433, as cited in the original publication of 
the species. 
I. puncrara, Klatt, 1. ¢., originally described as having the 
heads 7-flowered, proves, on careful dissections of portions of the 
type material, to have uniformly 4 flowers in each — fully 
agreeing in this regard with the other species of the gen 
M. renptert, Klatt, Abh. naturf. gesellsch. Halle, ‘1B, 324, 
although reduced in our revision to a synonym of M. cordifolia, 
Willd., is probably worthy of specific rank. 
. gonzalezii, sp. n. Vigorous smoothish twiner: branches 
obsoletaly 6-angled, finely striate, glabrous: leaves large, thin, gla- 
brous, ovate, entire, acute, broadly and shallowly cordate or sub- 
cordate, 5-nerved from the base, 4 to 12 em. long, 3 to 10 em. 
broad; petioles 1.5 to 5 em. long: heads in an elongated open 
panicle with short opposite corymbiferous branches (5 to 15 — 
long); bracts of the inflorescence oblong-lanceolate, petiolate . 
involucres 7 mm. long, subtended by shorter sessile oblong-ellip- 
tic or oval bractlets; pedicels puberulent under a lens; involucral 
