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 coriaceis, 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. 



