a OU 
er uit ox LES Rursum E or 
JANUARY 22, 1912] PALAWAN RUBIACEAE 1357 
subcompressed, 2-celled, each cell contains a single pendulous 
flattened ovule. 
Represented by number 12885, Elmer, Puerto Princesa 
(Mt. Pulgar), Palawan, March, 1911. 
Discovered in rich moist humus covered soil of humid for- 
ests at 750 feet along the trail to Napsan. 
A monotypic genus previously known only from Borneo. 
SARCOCEPHALUS Aízel. 
Sarcocephalus fluviatilis Elm. n. sp. 
Shrubs; stem crooked, 1 dm. thick, angular or wadded, 3 
to 5 m. high, branched from below the middle; wood sappy white, 
quite heavy and moderately hard, without odor or taste; bark 
gray on the branches, dull brown on the stem; branches crook- 
edly rebranched, horizontally spreading; the branchlets lax, 
numerous, ascendingly curved, usually with a fusiform thicken- 
ing, puberulent or finely hairy toward their ends. Leaves in 
few to several pairs toward the distal ends of the twigs, obo- 
vately oblong or the smaller ones oblanceolate, averaging 12.5 
em. long by 5 em. wide above the middle, obtusely and occa- 
sionally inequilaterally rounded at the base, terminated by a 
short blunt apex or in the smaller blades sharply acute, entire, 
spreading horizontally, recurved at distal end, otherwise flat, 
submembranous, glabrous and dark velvety green above, much 
paler and lighter green beneath; midvein prominent beneath, 
olivaceus hairy in the dry state; lateral pairs 7 to 9, ascendingly 
curved, tips reticulately united, less prominent and pubescent; 
reticulations evident, subglabrous, otherwise the leaf surface is 
glabrous except in the very young state; petiole less than 1 em. 
long, stout, pubescent or glabrate when old; stipule caducous, 
brown, 1 to 1.5 em. long, linearly oblong, hairy on the back 
especially below the middle, flat, 4.5 mm. wide; heads solitary, 
terminal, 4 em. across, creamy white except the green calyx ; 
peduncle 2 em. long, suberect, glabrate, minutely lenticelled, 
subtended by a pair of stipular bracts, stout and usually angular; 
calyx glabrous, angularly compressed, 3 to 4 mm. long, the 
basal one third encasing the ovary, the upper two thirds green 
