96 CXXIV. PIPERACE&. (J. D. Hooker.) - [Piper. 
P. ARBORESCENS, Roxb. Fl. Ind. i. 159, and Ed. Carey & Wall. i. 161.—To this 
Miquel refers Wallich’s No. 6643 E, a native of Penang, which is a flowerless barren 
state with variegated leaves of a plant called Cissus? porphyrophyllus by Lindley. 
At p. 307, however, he refers the same number to P. attenuatum. He also refers 
a Nilghiri plant of Perrottet to it; this plant I have not seen, but assume it to be 
P. Schmidtii. Lastly he figures his P. arborescens (Ill. Pip. 54, t. 54), but does not 
state where the figured specimen comes from. The only authority for Roxburgh's 
plant is his citation of Rumph (V. t. 28, f. 1), which is not recognizable as depicting 
any of the above-mentioned plants. . . 
P. ARCUATUM, Blume, var. nervis remotioribus, Mig. Syst. Pip. 334; from the 
Nilghiri Mts., Perrottet, — This is, I assume, the P. arcuatum var. B. quintuplinervium, 
Cas. DC. in Prodr. xvi. 1. 360. It is probably P. Schmidtii. 
P. ARANEUM, Wall. Cat. 6661; from Taong-dong in Ava, has neither flower - 
nor fruit, and is indeterminable. 
P. CLYPEATUM, Wall. Cat. 6655 (P. obtusissimum and P. manillanum, Mig. . 
Syst. Pip. 337, 339)—ure both species of Ficus. 
. P. CORIACEUM, Vahl Enum. i. 314, is doubtfully referred to P. Cubeba by 
Miquel (Syst. Pip. 289), and omitted by Cas. DC. 
P. pirrusum, Vahl Enum. i. 333, from Ceylon, is referred by Cas. DC. (Prodr. , ` 
xvi. 1. 364) to P. attenuatum, but I have seen no specimen of this from Ceylon. 
Cas. DC. omits this habitat, as does Miquel (Syst. Pip. 327), who gives Java and 
Amboyna. ° 
P. EXASPERATUM, Vahl Enum. i. 322; Cas. DC. in DC. Prodr. xvi. 1. 878. 
(Chavica ? exasperata, Mig. Syst. Pip. 275), is indeterminable. 
, P. FALLAX, Vahl Enum. 335, is doubtfully referred by Cas. DC. to P. 
nigrum var. trioicum, and by Miquel to P. longum or P. sarmentosum (Syst. 
Pip. 241). . 
P. reve, Vahl Enum. i, 832; Cas. DC. in Prodr. xvi. 1. 362; Mi . Pip. 
335, is indeterminable. | , xvi. 1. 362; Mig. Syst. Pip 
P. Maramiris, Linn. Sp. Pl. 29; Vahl Enum. i. 327 (see Nos. 15, 39, 41, 42). 
P. nigruM?, Wall. Cat. 6643 E, F; from Malacea, Singapore ay Penang.— 
These are young plants, with broadly cordate rounded leaves variegated green white 
and purple, of a Piper, species unknown, and are the Cissus? porphyrophyllus, Lindl. 
in Journ. Hort. Soc. i. 225, and Flore des Serres Ser. 2, iv. t. 1491. It is P. 
porphyrophyllum, N. E. Brown in Gard, Chron. (1884) xxii. 498. 
P. POTHOIDES, Wall. Cat. 6639 A; Cas. DC. in Prodr. xvi. 1. 351 (Chavica 
pothoides, Miq. Syst. Pip. 266).—' There are two species on this sheet, neither in 
flower or fruit. Of one of these there is a specimen in Herb Kew from the 
Andamans, collected by Kurz, in an equally imperfect state, B 
P. RETROFRACTUM, Vahl Enum.i.314; Cas. DC. in Prodr, xvi havica 
retrofracta, Miq. Syst. Pip. 275), is indeterminable. ode. xvi. 1. 878 (C pir 
,P. Surprqua, Ham. in Don Prodr. 20; Cas. DC. in Prodr. xvi. 1. 378 (Chavica 
Suipiqua, Miq. Syst. Pip. 275), is no doubt a common Nepal species but g cannot 
guess which. , ' 
P. SYLVESTRE, Lour.; Vahl Enum. i, 326,is evidently a mixt 
P. syRING#FOLIUM, Vahl Enum. i. 328 ; Cas. DC. in ? od y I havica 
syringefolia, Miq. Syst. Pip. 275), is indetermjnable. radr. xvi. 1.378 (Chavi 
^. THERMALE, l'a num. i. 328; Cas. DC. in Prodr. xvi. 1. 3378 (Chavica 
thermalis, Mig. Syst. 276), from hot springs at Tranquebar, should. be aod and 
determined by botanists in Madras by means of the locality, 
SOR? VENUSTUM, Wall. Cat. 6666; Cas. DC. in Prodr. xvi. 1. 378, from Sings 
pore, » M Cel os in a very young state, not distinguishable from P, remotiflorus, 
P. ZUCCARENII, Cas. DC. in Prodr. xvi. 1. 365, from Indi riffith in Herb. 
Munich, is indeterminable. The petiole is described as sheathing aroughout its 
length, which I have not observed in any Indian Piper, It is probably a Pothos. 
3. PEPEROMIA, Ruiz & Pav. 
Annual or perennial, usually succulent herbs. Leaves alternate opposite 
