96 cxxiv. riPERACE^E. (J. D. Hooker.) [Piper. 



P. ARBORESCENS, Eoxb. 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 

 slate with variegated leaves of a plant called Cixsus ? 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 assifme it to be 

 P. Schmidtii. Lastly he figures his P. arborescens (111. 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 vecognizable as depicting 

 any of the above-mentioned plants. 



* P. ARCUATDM, Blume, var. nervis remotioribus, Miq. Syst. Pip. 334; from the 

 Nilghiri Mts., Perrottet. This is, I assume, the P. arcuatum var. /J. quintuplinervium, 

 Cas. DC. in Prodr. xvi. 1. 360. It is probably P. Schmidtii. 



P. ARANEUM, Wall. Cat. 6661; from Taoug-dong in Ava, has neither flower 

 nor fruit, and is indeterminable. 



P. CLYPEATTTM, Wall. Cat. 6655 (P. obtusissiinum and P. manillanum, Miq. 

 Syst. Pip. 337, 339) are both species of Ficus. 



P. CORIACEUM, Vahl Enum. i. 314, is doubtfully referred to P. Cub&ba by 

 Miquel (Syst. Pip. 289), and omitted by Cas. DC. 



P. DIFFUSUM, Vahl Enum. i. 333, from Ceylon, is referred by Cas. DC. (Prodr. 

 xvi. 1. 364) to P. attenuatuniy 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. 378. 

 (Chavica ? exasperata, Miq. 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. LJEVE, Vahl Enum. i. 332; Cas. DC. in Prodr. xvi. 1. 362.; Miq. Syst. Pip. 

 335, is indeterminable. 



P. MALAMIRIS, Linn. Sp. PL 29; Vahl Enum. i. 327 (see Nos..l5, 39, 41, 42). 



P. NIGRUM: ?, Wall. Cat. 6643 E, F ; from Malacca, Singapore and Penaug. 

 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. Sort. Soc. i..225, and Flore des Serres Ser. 2, iv.. t. 1491. It is P. 

 porphyrophyllum, N. E. Brown in Qard. Chron. (1884) xxii. 438. 



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. 



P. RETROFRACTUM, Vahl Enum.'i. 314; Cas. DC. in Prodr. xyi. 1. 378 (Chavica 

 retrofracta, Miq. Syst. Pip: 275), is indeterminable. 



P. SUIPIQUA, Ham. in Don Prodr. 20; Cas. DC. in Prodr. xvi..l. 378 (Chavica 

 Suipiqua, Miq. Syst. Pip. 275), is no doubt a common Nepal species, but I cannot 

 guess which. 



P. SYLVESTRE, Lour. ; Vahl Enum. i. 326, is evidently a mixture. 



P. SYRINGE FOLIUM, Vahl Enum.i. 328$ Cas. DC. in, Prodr. xvi. 1. 378 (Chavica 

 syringaefolia, Miq. Syst. Pip. 275), is indeterminable. 



P. THERMALE, Vahl Enum. i. 328; Cas. DC. in Prodr. xvi. 1. 3378 (Chavica 

 thermalis, Miq.. Syst. 276), from hot springs at Tranquebar, should be obtained and 

 determined by botanists in Madras by means of the locality. 



P.? VENUSTUM, Wall. Cat.6G66; Cas. DC. in Prodr. xvi. 1. 378, from Singa- 

 pore, is a Pothos in a very young state, not distinguishable from P. remotiftorus, 

 Hook., of Ceylon. 



P. ZrjcCARENii, Cas. DC. in Prodr. xvi. 1. 365, from India, Griffith in Herb. 

 Munich, is indeterminable. The petiole is described as sheathing throughout its 

 length, which I have not observed in any Indian Piper. It is probably a Pothos. 



3. PEPEROB1IA, Ruiz $ Pav. 

 Annual or perennial, usually succulent herbs. Leaves alternate opposite 



