BUETTNERIACEJE. 91 



ripe fruit. — Hab. Jamaica I, Dist., Ah, March, common in woods and pastures; Caribbean 

 Islands ; [Texas !, Berland.; Mexico ! to Venezuela I and New Granada !, East Indies !]. 



2. G. ulmifolia, Lam. Leaves oblong-lanceolate (or ovate), pointleted, oblique at the 

 base, glabrous (powdery beneath in the younger state); " nut globose, with 5 longitudinal fur- 

 rows."— Tuss. Fl. 4. t. 24 ; Desc. Fl. 2. t. 85.— G. Bubroma, Tuss.~ Branchlets powdery- 

 rufescent, glabrescent ; flowers as in the preceding. — Hab. Jamaica !, Eb. Bks. ; Dominica !, 

 Imr.; S. Vincent!, Guild.; Trinidad!, Cr.; [Cuba, Portorico!, Guadeloupe!, Guiana!, 

 Brazil 1]. 



2. THEOBROMA, L. 



Calyx 5-partite, coloured. Petals 5 : limb cucullate, with a terminal, spathulate appen- 

 dage. Column 10-fid : fertile lobes biantheriferou3 : anthers bilocular. Style 5-fid. Fruit 

 baccate, 5-celled : cells pulpy, polyspermous. Embryo exalbuminons : cotyledons fleshy, cor- 

 rugate. — Trees; leaves entire; pedicels fascicled or solitary, lateral. 



3. T. Cacao, L. Leaves oblong, acuminate, glabrous, quite entire; flowers fascicled; 

 pericarp ovoid-oblong, 10-costate— SI. t. 160 ; Tuss. FL 1. t. 13 ; Desc. Fl. 4. t. 266 — 

 Calyx rose-coloured : segments lanceolate, acuminate, exceeding the yellowish corolla ; peri- 

 carp yellow or reddish, leathery, 6"-8" long. — Hab. Trinidad !, Schach ; naturalized in Ja- 

 maica !, Dist.; S. Lucia!, Anders., etc.; [Guiana!, Brazil!]. 



Tribe II. BTJETTNERIEM. — Column affixed above by the glands to the petals: anthers 

 solitary, inserted beticeen the column-lobes. 



3. AYENIA, L. 

 (Cybiostigma, Turcz.) 



Calyx 5-partite, membranaceous. Petals 5, affixed to the column by the top of the fili- 

 form claw.- limb inflexed. Column 5-lobed: anthers 3-locular, sessile in the sinuses be- 

 tween the lobes or sterile anthers. Style simple : stigma »f 5 globose lobes. Capsule penta- 

 coccous : carpids one-seeded, dehiscent along the inner angle. Embryo .... 



The three ovoid anther-cells, united in their axis and dehiscent by fissures, of which two 

 are lateral and the third extrorse, seem to afford the chief character to distinguish Ayenia 

 from Buettneria. If they were correctly to be compared with the three anthers of Guazuma, 

 the artificial character of the Order derived from bilocular anthers would be lost. In Buett- 

 neria celtoides, St. Hil., which, according to its filiform petal-claws, would be an Ayenia, and 

 has the habit of Cybiostigma, St. Hilaire has figured two disjoined anther-cells. 



The three West Indian species of Ayenia have no similarity of habit, and might as well 

 be considered as so many distinct genera, which by Buettn. microphylla, L., pass gradually 

 into that large genus. 



Sect. 1. Cybiostigma. — Limb of petals devoid of a dorsal or terminal appendage, reni- 

 form, and bicuspidale- hastate at the base. Column-lobes erects entire, antheriform. 

 Ovary shortly stalked. Capsule echinate. — Shrubs, covered with stellate down ; leaves 

 toothed ; corymbs axillary : flowers greenish. 



4. A. magna, L. Leaves cordate, acuminate, toothed-serrate : petiole almost half the 

 length of the limb, much exceeding the corymb ; calyx-segments ovate, acuminate, hairy ex- 

 ternally, spreading and almost three times longer than the corolla ; petal-limbs much ex- 

 ceeded by their claw : auricles extrorse ; column-lobes oval, much larger than the anthers ; 

 ovary hairy, three times longer than their carpophore ; style equalling the column ; capsule 

 globose. — A. cordifolia, DC. Cybiostigma abutilifolium, Turcz. ! — A shrub, 2'-5' high ; 

 leaves pubescent, velvety beneath, 2£"-3£" long, 2" broad ; corymbs solitary or fascicled, 3- 

 12-flowered; calyx l£"'long; capsule 3'" diam., covered with soft spines. — Hab. Jamaica!, 

 M'Nab, March, in the southern district of S. Andrew's ; [Mexico I, Yucatan !, Venezuela !]. 



Sect. 2. Leia yenia. — Limb of petals devoid of appendages, roundish. Column-lobes spread- 

 ing, bipartite. Ovary stalked. Capsule . • . . — A glabrous shrub ; leaves quite entire ; pe- 

 dicels axillary, filiform : flowers purple. 



5. A.. Isevigata, Sic.! Leave* ovate, obtutate, quite entire : petiole short, exceeded by 



