Pepercyniia.] cxiii. piperace.e (baker and wright). 149 



the spike ; rhachis glabrous ; bracts orbicular. Ovary obovoid, obtuse, 

 impressed in the rhachis ; stigma terminal, minute. 



XiOwer Guinea. Island of St. Thomas ; Angolares, Q;a'n^a*. 



2. P. pellucida, //. B. d- K. Nov. Gen. et Sp. i. G4. Annual.. 

 Stems weak, branched, erect from the base, very slender; branches 

 sometimes slightly pubescent. Leaves alternate, distinctly petioled, 

 broadly ovate, |-1 in. long, acute, slightly cordate at the base, mem- 

 branous, very thin, i3-7-nerved from the base. Spikes leaf -opposed, 

 shortly peduncled, very slender, lax, 1-2 in. long; rhachis glabrous, 

 strongly angled, not distinctly pitted ; bracts round-peltate, nearly 

 sessile. Berry very small, subglobose, sessile; stigma terminal. — 

 CDC. in DC. Prodr. xvi. i. 402, and in Bol. See. Brot. x. 154; Hiern 

 in Car. Afr. PI. Welw. i. 012. P. Vogelii, Miq. in Hook. Lond. Journ. 

 Bot. iv. (1845), 418 ; C. DC. I.e. 403. P. exigua, Miq. Syst. Piper. 77 ; 

 C. DC. I.e. 40o ; Hiern, I.e. ; var. freireifolia, C. DC. I.e. P.freirece- 

 folia, A. Rich. Tent. Fl. Abyss, ii. 274. Piper freirecefolium, Hochst. 

 ex A. Rich. I.e. 



Upper Guinea. Sierra Leone : forest on the way to Lester Peak, Scotf- 

 miiot, 'SSHbl Lagos, Dawodu, 4 I Northern Nigeria: Mount Patteh, 7'o^e/, 192 1 

 Cameroons : Bipinde, Zenker, 2719 ! 



Xile ]band. Abyssinia : shaded rocks in tlie Tacazze Valley, Schiinper, 1942 ! 



TUo-wer Guinea. Princes Island, Barter, 19781 St. Thomas Island, Dow .' 

 Moller. Angola : forest between Ambriz and Quizembo, 100-150 ft., Welwitsch, 

 506 ! Cazengo, by streams in forest on the Serra de Muxanlo, IVelwifsch, 504 ! 

 Pungo Andongo ; danip rocks by the Casalale stream, }Velwitsch, 503 ! and without 

 precise locality, Gossweiler, 451 ! 



IMCozamb. Bist. Portuguese East Africa : Lower Zambesi, opposite Sena, 

 KirJc I 



Cosmopolilan in the troi)ics; very common in America. 



3. P. knoblecheriana, Schott in Bot. Zeit. 1851, 2'2^), t. T). A 

 small succulent glabrous annual herb. Stem 1-2 in. high, simple or 

 nearly so, terete below. Leaves (except the two lowest) alternate, 

 patent, rotundate-ovate, slightly cordate, acute, about 4 lin. long and 

 nearly as much broad, with 3 opposite pairs of lateral nerves, sparingly 

 punctate ; petiole 1 lin. long, channelled above, margins finely crenulate, 

 convex below. Spikes solitary, axillary and terminal, shorter than the 

 leaves, 2-d lin. long; flowers hermaphrodite, 8-12, distant. Bracts 

 ovate, acute, concave. Stamens 2, lateral ; anthers globose. Ovary long- 

 ovoid, crowned by the minute penicillate stigma. Berry sessile, sub- 

 globose, rugulose, blackish, very shortly rostrate. — Verhuellia knobleche- 

 riana, C. DC. in DC. Prodr. xvi. i. 891. 



Hile Ziand. Sudan : on the shores of the White Nile, 5°-7'' N., Knollecher, 



4. P. Bauxnannii, C. DC. in Engl. Jahrh. xxvi. SCO. A herb 

 nearly 5 in. high from a decumbent base. Leaves alternate, ovate, 

 rather obtusely acuminate, IJ in. long, | in. wide, glabrous on both 



