D1COTYLEDONES: POLYPETALJ! : THALAMIFLORJ!. 



611 



sepals are staminodes or they are suppressed : anthers 4-locular : 

 the corolla is sometimes wanting : gynaeceum usually syncarpous, 

 with a single style and a 5-locular ovary with 2-oo seeds in each 

 loculus. Flowers sometimes diclinous (Sterculiese). 



Theobroma Cacao is a tree of tropical America, the seeds of which contain a 

 nitrogenous substance Theobromine and a fixed oil ; from them Chocolate is 

 prepared. The seeds of Cola acuminata, a tropical African tree, have similar 

 properties. 



Order 3. MALVACEJ:. Calyx nsually gamosepalous, frequently 

 invested by an epicalyx (p. 494) ; the corolla is adnate at the 

 base to the androecium : the typically obdiplostemonous androe- 



D 



FIG. 413. A Flower of Malva Alcea (nat.size): fc calyx; c corolla ; connate stamens, 

 with the anthers (a); n stigmata. B Fruit of Althaea rosea enclosed in (k) the calyx: ak 

 epicalyx. C The same after the removal of the calyx. D A single coccus of the same in 

 longitudinal section : s seed ; w radicle ; st cotyledon of the embryo (mag.) . 



cium is a long tube (Fig. 413 A} consisting of five monadelphous 

 nsually branched stamens which are opposite to the petals, each 

 branch bearing a bilocular anther ; there is somstimes an inner 

 series of staminodes opposite to the sepals: carpels 5-oo ; styles 

 many, connate ; the gynseceum, is sometimes almost apocarpous 

 (Malopeae) ; usually syncarpous with a multilocular ovary, split- 

 ting into cocci (Fig. 413 C D), with usually one ovule in each 

 coccus (p. 530), or a loculicidal capsule (Hibisceae), Under- 

 shrubs or herbs : leaves stipulate and generally palmately veined. 



Malva, the Mallow, has an epicatyx of three bracteoles, Hibiscus has one of 

 many bracteoles, and Althasa has one of 6-9 bracteoles : Alth&a rosea is the 



