236 schombuugk's guiana plants. 



and less obtuse. Presl's Anisomeris spinosa, also a Chomelia, dif- 

 fers slightly from the last mentioned species in the still greater 

 inequality of the lobes of the calyx, and in the form of the 

 leaves broader at the base. Gardner's n. 1694 from Ceara 

 is apparently a new species, also very near to Presl's. 



The genus Chomelia, as well as the two following, differ 

 from the true Psychotriece in their pendulous ovules, and 

 should perhaps be referred to GuettardecB, where De Candolle 

 has placed Malcmea, or possibly with some others form a dis- 

 tinct tribe, but of which I have not examined species enough 

 to establish the characters at present. 



514. Malanea sarmentosa, Aubt DC. Prod. iv. 459. — 



Ovula 2, pendula. — Sides of rivers, British Guiana, Schom- 

 burgk, n. 384 — This plant answers to Aublet's figure and 

 description much better than the Brasilian plant, distributed 

 by Martius under the n. 394 of his Herbarium Brasiliense, 

 and referred by him to Aublet's species, but which is probably 

 a new one. 



515. Chiococca nitida (sp. n.) ; foliis oblongo-eliipticis, 

 breviter et obtuse acuminatis, coriaceis, nitidis, racemis axil- 

 laribus binis laxis subramosis, dentibus calycinis brevissimis 

 filamentis villosis. — Folia 3-5-pollicaria. Stipulae brevissimse, 

 vix apiculatse. Corolla 4-lin. longa, fere campanulata. An- 

 therffi lineares, inclusae. — British Guiana, Schomburgk^ n. 

 1055, probably from Rorairaa. 



Gardner's n. 1418 from Alagoas belongs to the same genus, 

 and appears to be the C. densifolia, Mart. 



516. Geophila reniformis^ Ch.etSchl. — DC. Prod. iv. 537. 

 — British Guiana, Schomburgk, n, 194. 



517. Y)ec\ieux\a ckiococcm'des, Humb. et Kunth. — DC. Prod. 

 iv. 479 — Stony savannahs, Pirara, Schomburgk^ n. 723. — 

 Gardner's Nos. 1701 and 1702 from Ceara, appear to me to 

 be mere varieties of this species. 



Tribe, Spermacoce^. 



518. Diodia scandens, Sw.?— DC. Prod. iv. 563.— French 

 Guiana, Leprieiir, Herb. Par. n. 166 and 172. 



