VIII, c. 4 Merrill: Philippine Melastomataceae, I 225 
undulate, as prominent as the lateral transverse nerves, the 
latter straight, about 12 on each side of the very prominent 
midrib. Inflorescence paniculate, terminal, usually two tei^ 
minating each branchlet, one in each leaf-axil, in fruit up to 
20 cm long, the peduncle 10 cm long or more, prominently and 
thinly 4-winged, the branches few, spreading, whorled, the lower 
ones about 5 cm long, 4-winged. Flowers unknown. Fruit 
purple, globose-ovoid, about 7 mm in diameter. 
Luzon, Province of Cagayan, Abulug River, Bur. Sci. 138^6 Ramos, 
January, 1912, in forests near Dabba. 
A species similar to Memecylon affine Merr., M. payiiculatum Jack, M. 
preslianum Triana, etc., but well characterized by its thinly but promi- 
nently 4-winged elongate rachis of the inflorescence. 
26. MEMECYLON SESSI LI FOLI U M Merr. in Philip. Journ. Sci. 5 (1910) 
Bot. 209. 
Luzon, Province of Nueva Ecija, For. Bur. 22155 Alvarez, December, 
1910: Province of Camarines, For. Bur. 1873^. Darling, April, 1910. 
A very characteristic endemic species. 
27. MEMECYLON DENSIFLORUM Merr. in Philip. Journ. Sci. 3 (1908) 
Bot. 248. 
Memecylon palawanense Elm. Leafl. Philip. Bot. 4 (1911) 1197. 
Luzon, Province of Cagayan, For. Bur. 18^82 Alvarez: Province of 
Rizal, Loher 6031, 6032, 6239: Province of Tayabas, For. Bur. 1869i 
Darling. Polillo, Bur. Sci. 10259 McGregor. Mindoro, For. Bur. 5323, 
5J/.32, 5509 Merritt, Merrill 2251. Palawan, Elmer 13235 (type number 
of M. palawanense). Leyte, For. Bur. 127^0 Rosenhluth. Mindanao, 
Province of Surigao, Bolster 368 (type), Ahern 515: District of Lanao, 
Mrs. Clemens s. n.: District of Zamboanga, Bur. Sci. 16380 Reillo, For. 
Bur. 9il8, 9187, 9189, 9^55 Whitford & Hutchinson. 
The species as here interpreted shows considerable variation, but the 
variation is chiefly in the size of the leaves, the maximum size in the 
specimens here referred to M. densifiorum being about 10 cm long and 4 
cm wide; in the type and in M. palawanense they are much smaller, 5.5 
cm long and 2.5 cm wide, but in the abundant material available all inter- 
grades can be found between the sizes indicated above. The flowers are 
sometimes fascicled, sometimes in short-peduncled cymes, both types being 
usually found on the same specimen. The ultimate branchlets are usually 
distinctly 4-angled, sometimes, however, merely sulcate on two sides and 
not evidently angled, as in M. palawanense; all intergrades occur. The 
types of M. densifiorum and M. jmlawanense are not absolutely identical, 
but I have not detected sufficient constant differences to warrant keeping 
them separate. 
28. MEMECYLON OBTUSIFOLIUM sp. nov. 
Frutex glaber, circiter 3 m altus, ramis teretibus, ramulis 
junioribus distincte sulcatis, baud 4-angulatis; foliis petiolatis, 
crasse coriaceis, obovatis ad oblongo-obovatis, usque ad 4 cm 
longis, apice late rotundatis, interdum retusis, vel obtusis, basi 
