228 scho.aibukgk's guiana plants. 



— Friitex ereclus. Ramuli, folia et iiiflorescentia fere P. 

 parasitica. Folia 2 — 3-polIicaria. Corymbus regulariter 

 trichotomus. Flores roseo-albi. Corollee 3 lin. longae, tubo 

 tenui, fauce abrupte ampliata. — Maravvaca, Schomburgk; a 

 single specimen. — Tiie two latter species differ from others 

 of the group by the appendages on the back of the divisions 

 of the corolla near the apex, but in those genera of Rubiace^e 

 which, like Psychotria, have a valvate aestivation, and a ten- 

 dency to a general thickening of the divisions of the corolla, 

 these appendages do not appear to be of much importance, 

 and the tetramerous flowers occur occasionally in most of 

 the groups into which this extensive genus may be distri- 

 buted. I doubt much, however, whether any characters can 

 be found to raise any of these groups into distinct genera, 

 at least as to the American species. 



Among the group which I have called Paniculatce, (distin- 

 guished by the loosely paniculate or corymbose flowers, 

 minute bracts and persistent stipules consisting of a mem- 

 branous sheath, often very short, with two teeth or rigid 

 green stipules on each side,) I would include Gardner's n. 

 1339 from Alagoas, and probably his 454 from the Organ 

 INIountains ; besides P. Bahiensis, DC, and many other 

 published Brasilian species. Amongst the latter is the P. 

 leiocarpa, Cham., which is Gardner's n. 453 from the Organ 

 Mountains, and which I have received from Martins under n. 

 112 of his Herbarium Brasiliense. The n. 232 of the same 

 herbarium, also referred by Martius to P. leiocarpa, is, in my 

 set at least, a species of Faramea. 



491. P.(BracteatBe) setifera (sp. n.); glabra, foliis oblongo- 

 lanceolatis setaceo-acuminatis basi angustatis, stipulis utrin- 

 que binis subulatis petiolum brevem aequantibus, panicula 

 folia superante trichotoma, bracteis anguste linearibus seta- 

 ceo-acuminatis flore parum brevioribus, corolhe glabrae im- 

 berbis laciniis limbi tubo paruni brevioribus. — Folia 2-2|- 

 pollicaria. Flores numerosi, 3 lin. longi. — A single specimen 

 which was in my set amongst those of Sipanea dichotoma, the 

 No. being probably lost. 



