26 1 M. Schomburgk on the Ant Tree of Guiana. 



d. 212. On Ranunculus Ficaria. Common. White, sporidia 

 irregularly oblong, Blightly curved. 



13G. Uredo Artemisia, Chev. PL Par. vol. i. p. 399; Berk. 



Brit. Fung. Fasc. 3. n. 233. On - Irtemisia Absinthium, King's 

 Cliflfe. 



1 37. Uredo pompholygodes, Schlecht. in Linn. vol. i. p. 248; 



Berk. Brit. Fung. Fasc. 3. n. 23G. On Anemone nemorosa, 

 King's Clitic ■. May. It is to be observed that U. Ranuncula- 

 <i a rn m. Dec, is at least in great part the same species with 

 the present, of which U. Anemones, Dec. Fl. Franc, is a sy- 

 nonym. Consequently the species described in Eng. Fl. under 

 the name of U. Ranunculacearum on Link's authority, must 

 bear the name of Uredo Ficaricu, Alb. and Schwein. 



XXVIII. — On the Ant Tree of Guiana (Triplaris Americana). 



By Robert Schomburgk, Esq.* 



TRIPLARIS, Linn. 



Class IX. Ord. II. Ord. Nat. Polygoxe^e, Juss. 



Flores dioici. Calyx basi tubulosus, pilosus. Flores Masc Calyx limbo 

 6-partitus. Corolla 0. Stamina 0. Flores Fern. Calyx 3-pavtitus. Co- 

 rolla 3-petala. Ovarium 3-quetrum. Styli tres. Akenium 3-quetrum, 

 calyce aucto tectum. 

 T. Americano, foliis alternis, intcgerrimis, oblongis, acutis, nervosis ; sti- 

 pulis lanceolatis laceris, spicis terminalibus axillaribusque brachiatis. 



Triplaris Americana, Linn. Sp. PL p. 130. Aubl. Guian. ii. p. 915. 

 t. 347. — T. Pyramidalis, Jacq. Anier. 13. t. 173. f. 5. 



A tree from fifty to sixty feet in height; its trunk smooth, 

 of a greyish colour ; the branches erect, frequently in the 

 form of a pyramid ; leaves entire, oblong and narrow, from 

 nine to twelve inches long, of a dark green colour ; petiole di- 

 lated at the base, somewhat amplexicaule, with ochreate sti- 

 pulae, and marks at the opposite direction, as of fallen-ofF pe- 

 tioles ; flowers unisexual. Males : calyx hairy, tubular, sur- 

 rounded by a laciniated bractea, six-parted ; corolla absent ; 

 stamens nine, divided in three parcels of different sizes, the 

 large ones opposite the segments of the calyx, filaments 

 somewhat crooked ; anthers ovate, two-celled, dehiscing 

 lengthwise. Females : calyx provided with the bractea, three- 



* Read before the Botanical Society of London, April 6, 1838, and com- 

 municated by that Society. 



