Flora of the Malayan Peninsula. 293 
This species is very much like P. convexa, Miq., from which it differs by its 
obovate bract. 
2. Piper, L. (pro parte). 
Shrubs or small trees, with swollen nodes. Leaves provided with 
stipules inserted on the margins of the petiolar sheath. Spikes 
pedunculate, usually oppositifolious, rarely axillary or condensed at 
the top of an axillary ramulet. Flowers unisex ual or bisexual, 
sessile or rarely pedicellate. Stamens 2—6, rarely 1 or 8—10, hypo- 
gynous or connate with the ovary at its base, rarely higher ; anthers 
deciduous, usually 4-valvate, rarely 2-valvate when opening, slits 
lateral, filaments persistent. Ovary free or partly imbedded in and 
connate with the rhachis ; stigmas 2—6, very rarely a single terminal 
stigma. 
Key to the Sections. 
A. Flowers sessile. 
a. Spikes oppositifolious. 
Bracts not connate .. .. SECTION I, EUPIPER. 
Bracts connate at their lower and 
upper ends ne .. Seorion II, MuxpeEra. 
6. Spikes condensed at the top of an 
axillary ramulet Sb -- Section III, Heorerta. 
B. Flowers pedicellate ye -- SEOTION IV, ENCKEA. 
Secor. I.--Evuprper C. DC. in Prodr. XVI. 1. 339, emend. 
Spikes oppositifolious. Bracts not connate, hypopeltate, with 
a central pedicel or subsessile or adnate to the rhachis and then free 
only at their ends and lateral margins. Flowers sessile, unisexual or 
rarely bisexual. Stamens 2, lateral, rarely 3—4 of which 2 are lateral. 
Ovary free or partly imbedded in and concrescent with the rhachis. 
Key to the species of the Malayan Peninsula. 
(All dicecious, except ns.: 7, 25, 32, 46, 48 which are polygamous.) 
N.B.—All measurements and other foliar characters indicated in this key 
and in the diagnoses always refer to the leaves of the upper part, that is to say 
of the flowering part of branches. The width of leaves is taken from their 
widest Portions. 
A. Berry not stipitate. (Nos. 1—29). 
1°. Bract not adnate to the rhachis, rounded or obovate, 
with central pedicel or sessile. (Nos. 1—78). 
a. A single orbicular or globose stigma, berry partly 
imbedded in the rhachis. (Nos. ! 2). 
A Leaf entirely glabrous. Limb oblong-elliptic-lanceo- 
late, 9°5—11-°5 cm. long, 2—3 cm. wide .. 1. P. globulistigmum 
