312 MERRILL. 
is represented only by the type collection from Samar, Cuming 1696, of 
which I have examined a specimen preserved in the Kew Herbarium, and of 
which I- have a carbon rubbing representing the leaf -outline and venation, 
and Elmer 7255 from the neighboring island of Leyte, type collection of 
Begonia leytensis Elm. The material I referred to B. quercifolia may prove 
to be only a luxuriant form of B. contracta, but it seems advisable to wait 
for more material before definitely deciding this point. 
THYMELAEACEAE. 
MACGREGORIANTHUS gen. nov. 
Flores hermaphroditi. Perianthii tubus elongatus, cylindricus, 
lobi 5, patentes, fauce intus nuda. Stamina 10, tubo 2-seriatim 
inclusa, filamentis brevissimis ; antherae oblongae, parvae. 
Discus annularis, brevissimis, obscurissimis, lobatis. Ovarium 
sessile, villosissimum, 1-loculare, in stylum desinens, stigmate 
obovoideo, papilloso. Fructus ignotus. Frutex ut videtur scan- 
dens. Folia opposita, plana, margine cartilaginacea. Flores in 
paniculis axillaribus terminalibusque laxis elongatis dispositis. 
Perianthia extus puberula. 
MACGREGORIANTHUS PANICULATUS sp. nov. 
Frutex inflorescentiis exceptis glaber; foliis coi'iaceis, ovato- 
ellipticis ad oblongo-ellipticis, usque ad 9 cm longis, obtusis vel 
obscure brevissime late acuminatis, nervis utrinque circiter 13; 
paniculis elongatis, paucifloris, griseo-puberulis, 12 at 25 cm 
longis; floribus ad apices ramulorum fasciculatis, circiter 8 mm 
longis. 
A shrub, climbing (fide McGregor), glabrous except the inflo- 
rescence. Branches reddish-brown, terete, slender, the younger 
ones often somewhat puberulent, soon becoming quite glabrous, 
wrinkled when dry. Leaves opposite, coriaceous, olivaceous and 
slightly shining when dry, the lower surface somewhat paler 
than the upper, ovate-elliptic to oblong-elliptic, 6 to 9 cm long, 
3 to 5.5 cm wide, base rounded or subacute, apex obtuse or very 
broadly, shortly, and bluntly acuminate, the margins entire, 
cartilaginous; nerves about 13 on each side of the midrib, spread- 
ing-ascending, anastomosing directly with the cartilaginous leaf- 
margin, the reticulations obscure; petioles reddish-brown when 
dry, about 1 cm long. Panicles terminal and in the upper axils, 
elongated, lax, few-flowered, all parts densely and uniformly gray- 
puberulent, and with scattered, reduced, linear bracts 5 mm long 
or less. Flowers pale-green, 5-merous, 9 mm long, fascicled at the 
ends of the ultimate branchlets, their pedicels 5 mm long or less. 
