DICOTYLEDONES: POLYPETAL.E : THALAMIFLORJ:. 



611 



sepals are starainodes 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-co seeds in each 

 loculus. Flowers sometimes diclinous (Sterculieae). 



Theobromo 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 ola acuminata, a tropical African tree, have similar 

 properties. 



Order 3. Malvace.*:. Calyx usually gamosepalous, frequently 

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

 base to the andrcecium : the typically obdiplostemonous androe- 



FiG.413.— ^ Flower of Mnlva Alcta (nat. size): fc calyx; c corolla; s connate stamens, 

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

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

 longitadinal section : a seed ; w radicle ; ti cotyledon of the embryo (mag.)' 



cium is a long tube (Fig. 413 A) consisting of fiv^e monadelphous 

 usually branched stamens which are opposite to the petals, each 

 branch bearing a bilocular anther ; there is sometimes an inner 

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

 many, connate; the gynaBceum is sometimes almost apocarpous 

 (Malopea?) ; usually syncarpous with a raultilocular ovary, split- 

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

 coccus (p. 530), or a loculicidal capsule (Hibiscea3), Under- 

 shrubs or herbs : leaves stipulate and genei*ally palmately veined. 



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

 manj bracteoles, and Althaea has one of G-9 bracteoles : Althaa rosea is the 



