72 SIR DIETRICH BRANDIS—AN ENUMERATION 
6. PENTACME, A. DC. 
Sepals strongly imbricate. Petals broad, spreading. Stamens 
15. Anthers oblong, on short broad filaments. Anther-cells 
equal, each prolonged into a short appendix ; the connective also 
prolonged, so that each anther has 5 apical appendages. Ovary 
glabrous, prolonged into a conical stylopodium; style filiform, 
glabrous. Stigma obtuse, indistinctly 3-partite. The three outer 
segments of fruiting-calyx much larger than the others, narrowed 
into a stalk, but expanding into a broad base, which is adpressed 
to the lower portion of the fruit, but does not enclose it. 
The anatomical structure is only known of P. suavis, A. DC. 
In the pith of the leaf-bearing internode 12-25 ducts, 3 leaf- 
traces, each with one duct, the two lateral enter the bark imme- 
diately under the base of petiole. Judging from the appearance 
of herbarium specimens, the cortical leaf-traces would seem to be 
as long as the internode in P. paucinervis. In the petiole a 
semicircle of 7-9 vascular bundles, each with one duct, 3 resin- 
ducts in the central mass. 
Three species only known at present, two from the Eastern 
Peninsula and one from the Philippine Islands. 
1. P. suavis, A. DC. in DO. Prodr. xvi. pars 2 (1864), 626.— 
P. siamensis, Kurz in Journ. Asiat. Soc. Bengal, xxxix. pars 2 
(1870), 66; Pierre, Fl. For. Cochinch. fasc. 15 (1890), tt. 225— 
227; Engler, Nat. Pflanzenfam. ii. 6. fig. 192 A-C.—Shorea 
siamensis, Mig. Ann. Mus. Lugd.-Bat. i. (1863-4) 214; Dyer 
in Hook. f. Fl. Brit. Ind. i. 304. 
_ A large tree, on dry ridges a shrub, bearing flower and seed. 
Leafless during part of the hot season. Throughout the Eastern 
Peninsula, north to the 25? N. lat.,in Burma, Siam, and Cochinchina. 
In Pegu and Martaban scattered in the woods of Dipterocarpus 
tuberculatus, in Upper Burma and in Cochinchina gregarious. 
Flowers showy, on pedicels as long as calyx, coming out in 
large panicles when the tree is leafless. Petals orbicular or 
broadly ovate, yellow, at flowering-time forming a hollow globe, 
open at the top only and enclosing stamens and ovary. Cotyledons 
thick, fleshy; the radicular concave, enclosing the other, both 
with large basal lobes ; petioles well developed in the seed ; radicle 
short piumula conspicuous. Cells filled with fat-oil. 
