CHAPTER II 



DiCHOTOMous Key to the Economic Species of the 

 Genus COFFEA 



Section I. Corolla 5 to 8 partite Eucoffea Hook. f. 



Exception: — Coffea canephora Pierre is sometimes 4-partite. 

 Section II. Corolla 4-partite Lachnostoma Hook. f. 



Section I:— EUCOFFEA Hook. f. 



Trees or shrubs. Flowers fascicled or solitary. Corolla-lobes 

 5 to 8, large, obtuse; corolla-tube long and slender; anthers exserted 

 or included, dorsifixed. Calyx-limb irregularly few or many-toothed. 

 Style usually long; but commonly short in Coffea Wiffhtiana Wall., 

 Coffea travancorensis Wight & Arn., Coffea fragrans Wall, ex Hook. 

 f., and Coffea bengalensis Heyne ex Roem. & Schult. Fruit didy- 

 mous when 2-seeded. Endosperm, in transverse section, shows 

 characteristic plications or, at least, wrinklings; knottiness of the 

 cell-wall distinct. 



I. Anthers included (hidden in the corolla-tube), see II. 

 I. Stigmas included in the corolla-tube. 



A. Leaves rough (unglazed), hairy at least in the axils of the 

 lateral veins, 

 a. Flowers 5-6-partite, calyculus extending beyond the calyx- 

 margin. 

 x. Each calyculus surrounding one flower; fruit bicapitate 

 by longitudinal furrows; — see y. 

 *. Calyx dentate; — see **. 

 +. Calyx-teeth fringed ; — see + -|- ; bracts chaffy, not 

 herbaceous; flowers appear before the leaves; branches 



with whitish or grayish loose bark, thick 



C. Wiffhtiana Wall. 



-f +. Calyx cup-shaped, many-toothed; synanthous; a 



glabrous bush; branches covered with fine, short, 



