120. POLYGALACEAE — 121. DICHAPETALACEAE — 122. EUPHORBIACEAE 309 



petal with an appendage. Shrubs. — Species i. South Africa (Cape 

 Colony). The fruits are edible. {Mwidtia Kunth). Mundia Kunth 

 P>uit a capsule. Stamens S, rarely 6 or 7. — Species 170. Some of 

 them 3'ield fibres or fat from the seeds, others serve as ornamental or 

 medicinal plants. " Milkwort." Polygala L. 



SUBORDER DICHAPEIALINEAE 



FAMILY 121. DICHAPETALACEAE 



Shrubs or trees. Leaves alternate, undivided, stipulate. Inflorescence 

 C3'mose. Sepals 4 — -5, imbricate in bud. Petals 4 — 5, usually 2-cleft. Disc 

 present, but sometimes reduced to separate glands. Stamens 5, sometimes 

 onl}- 2 — 3 fertile. Anthers opening inwards. Ovary 2 — 3-celled, usuall}' 

 superior. Ovules 2 in each cell, pendulous, inverted ; raphe ventral. Style 

 2 — 3-cleft or undivided with 2 — 3 stigmas. Fruit a nut or drupe. Seeds 

 1 — 2, exalbuminous. — Genera 2, species 75. Tropical and South Africa. 

 (CHAILLETIACEAE.) (Plate 79.) 



Petals unequal, united below into a long tube, 2-cleft, imbricate in bud. 

 Sepals united below, unequal. Fertile stamens 2 — 3. Disc semi- 

 annular. — Species 2. Central Africa Tapura Aubl. 



Petals equal, free or united at the base, rarely higher. Fertile stamens 

 5. -— Species 75. Tropical and South Africa. Some are poisonous. 

 {Chailletia DC.) (Plate 79.) Dichapetalum Thouars 



SUBORDER TRICOCCAE 



FAMILY 122. EUPHORBIACEAE 



Flowers unisexual. Stamens hypogynous, rarely [BrideUa) perigynous. 

 Anthers 2-celled. Ovary superior or naked, usually 3-celled. Ovules solitary 

 in each cell, or 2 side by side, pendulous, inverted ; raphe ventral ; micropyle 

 usually covered by an outgrowth of the placenta. Fruit generally separating 

 mto 3 dehiscing mericarps. Seeds usually albuminous ; embryo axile, radicle 

 superior. — Genera 122, species 1200. (Including DAPHXIPHYLLA- 

 CEAE.) (Plate 80.) 



1. Ovule I in each ovary-cell. [Subfamily CROTONOIDEAE.] ... 2 

 Ovules 2 in each ovary-cell. Juice not milky. [Subfamily PHYLLANTHOI- 



DEAE.j 76 



2. Inflorescence consisting of partial inflorescences having the appearance 



of a single flower and containing one female flower and several or many 

 male ones surrounded by a lobed in^•olucre with glandular appendages. 

 Petals none. Stamen i. Ovary 3 — 4-celled. Juice milky. [Tribe 



EUPHORBIEAE.i 3 



Inflorescence not consisting of partial inflorescences looking like a single 

 flower II 



