ok iv BOTANICAL CHARACTERISTICS 39 



To this genus Theobroma belong, first, the two 

 species which produce the commercial cocoa, namely, 

 Theobroma cacao and Theobroma pentagona, which 

 is sometimes considered as a variety of the former ; 

 then some twelve other more or less well-known 

 and well -described species, which do not produce a 

 marketable article and are not cultivated ; and, finally, 

 some four other species, which are very imperfectly 

 known. 



Schumann 1 has made a thorough study of the 

 systematic characteristics of these different species of 

 the genus Theobroma, and has composed a dichotomic 

 table, by which the fourteen more or less well-described 

 species can be determined. This table is given here, 

 slightly modified and reduced so as to be also intelligible 

 to the non-botanist : 



Leaves palmate ; stamina with six anthers (sub-species Her- 



rania). 

 Margin of the leaflets dentate : 



Flowers purplish-yellow . . T. Mariae, Gond. 

 Flowers carmine ; the hairy fruits 



have ten prominent ridges . T. pukherrima, Gond. 

 Flowers white with purplish veins; 

 glabrous fruits with ten pro- 

 minent ridges . . T. balaensis, Preuss. 

 Flowers white ; hairy fruits with 



ten prominent ridges . . T. albiftora, Gond. 



Margin of the leaflets lobate . . T. lacinifolia, Gond. 



Leaves not lobed nor divided, stamina with four anthers ; limbs 

 of the petals two or three times as long as the cup-shaped basal 

 part (sub-species Eutheobroma). 



Limb of the petal spoon-shaped : 



Fruit with ten sides or ridges . T. cacao, L. 

 Fruit with five sides and five 



prominent ridges . . . T. pentagona, Bern. 



Limb of the petal small, disk-shaped T. bicolor, Humb. et 



Bonpl. 



1 Schumann, Flora brasiliensis : Sterculiaceae. See also : Jumelle, Le 

 Cacaoyer, pp. 10-38 ; De Wildeman, Les Plantes tropicales de grande culture, 

 pp. 83-98. 



