SCHOMBURGK's GUIANA PLANTS. 2S5 



superans, superne angulatus compressus. Corolla lutea, tubo 

 intus annulo pilorum barbate, basi gibbo, laciniis limbi brev- 

 Jbus reflexis. Bacca (teste Schomburgkio) nigra. — AfEnis 

 P. crocem, — Banks of rivers, British Guiana, Schomhurgk, n. 

 337. — In these specimens the anthers are included within the 

 tube, and the style is exserted, but in Palicourea, as well as 

 in Psychotria, the proportionate length of the stamens and 

 style is variable in the same species, depending apparently 

 on sexual distinctions. 



480. P. Guianensis, Aubl DC. Prod. iv. 509, — Sandy 



soil, British Guiana, Schomburgk, n. 49T. — I have two speci- 

 mens : in the one, with exserted stamens, the leaves are near 

 a foot long, of the form figured by Aublet, and nearly smooth ; 

 in the other, with exserted style, the leaves are broader and 

 rough on the surface. 



481. P. rigida, Humh. et Kunth DC. I. c. — Savannahs, 



British Guiana. Schomhurgk, n. 264. 



Gardner's n. 447, and 448, from the Organ Mountains, 

 and 1040 from Pernambuco belong to Palicourea. 



482. Psychotria Mapouria, Rmn. et Schult — DC. Prod. iv. 

 509. — British Guiana, Schomhurgk — a single specimen. — The 

 chai'acters by which the group of Mapouria: are maintained 

 by Endlicher as distinct from Psychotria, appear scarcely 

 sufficient to constitute more than a section. 



483. P. (Mapouria) remota (sp. n.) ; glabra, foliis ovalibus 

 ovato-oblongis v. ovato-lanceolatis acuminatis basi rotundatis 

 cuneatisve nitidis, stipulis lato-ovatis acutis deciduis petiolum 

 aequantibus, pedunculis terminalibus demum lateralibus elon- 

 gatis, ramis oppositis verticiilatisve inferioril)us remotis apice 

 cymiferis trichotoniis, calycibus brevissime dentatis, corollse 

 glabrae ad faucem barbatje laciniis limbi tubo subcampanu- 

 lato aequilongis. — Forte P. sororicv, DC, niniis affinis. Dujb 

 adsunt varietates, in altera folia coriacea, nitida, 4 — 6-poll. 

 longa, 2 — 2^-poll. lata; in altera folia minus coriacea, lati- 

 ora, basi potius cuneata quam rotundata. — On the Ptio 

 Negro, Schomburgk, n. 963. 



484. P. (Verae) chlorantha (sp. n.) ; glaberrima, ramis 

 Juwn. of Bot. Vol. III. No. 21, Feb. 1841. 2 g 



