149- GUTTIFERAE — 150. DIPTEROCARPACEAE — I5I. ELATINACEAE 363 



16. Flowers unisexual. Ovaiy 2-celled with 2 ovules in each cell. Fruit a 

 berry. — Species i. Madagascar. .... Leioclusia Baill. 



Flowers hermaphrodite. Ovary 3 — 5-celled. Fruit a capsule. (See 6.) 



Hypericum L. 



FAMILY 150. DIPTEROCARPACEAE 



Trees or shrubs. Leaves alternate, simple, entire, stipulate. Flowers in 

 cymes or panicles, regular, hermaphrodite. Sepals 5, imbricate in bud, en- 

 larged in fruit. Petals 5, witli contorted aestivation. Stamens numerous, 

 hypogynous or nearly so, with a prolonged connective. Ovary superior, 3- 

 cellcd. Ovules 2 in each cell, descending, inverted. Style simple. Fruit a 

 one-seeded nut. Seeds without albumen or with a very thin albumen. — - 

 Genera 2, species 15. Tropics. 



Receptacle flat. Filaments short. Anthers linear, adnate. Ovary glabrous. 

 Embryo with thick, fleshy cotyledons. Tall trees. — Species 1. Sev- 

 chelles. Yields timber, resin, and fatty seeds. [Subfamily DIP- 



TEROCARPOIDEAE.] Vateria L. 



Receptacle raised. Filaments long. Anthers oval, versatile. Embryo 

 with thin, leaf-like, twisted cotyledons. — Species 15. Central Africa. 

 (Under Vaiica L.) [Subfamily MONOTOIDEAE. , Monotes A. DC. 



SUBORDER TAMARICINEAE 



FAMILY 151. ELATINACEAE 



Herbs or undershrubs. Leaves opposite or whorled. undivided, stipulate. 

 Flowers solitary or in cymes, regular, hermaphrodite. Sepals 3 — 5, free 

 or united at the base, imbricate in bud. Petals 3 — 5, free, hypogynous, im- 

 bricate in bud, persistent in fruit. Stamens hypogynous, as many or twice 

 as many as the petals. Anthers attached by the back, opening inwards bv 

 longitudinal slits. Ovary 3 — 5-celled. Ovules numerous, axile, inverted, with 

 a short funicle. Styles 3 — 5, free. Fruit a septicidal capsule. Seeds 

 exalbuminous. — Genera 2, species 15. (Plate 100.) 



Flowers 3 — 4-merous. Sepals united below, with a faint midrib and with- 

 out membranous margins. Ovary depressed at the top. Flowers 



solitary. — Species 3. North Africa Elatine L. 



Flowers 5-merous. Sepals free or almost free, with a very projecting midrib 

 and with membranous margins. Ovary narrowed at the top. Leaves 

 serrate. — Species 12. Central and Soutli Africa and Egypt. (Plate 

 100.) Bergia L. 



FAMILY 152. FRANKENIACEAE 



Herbs or undershrubs, rarely low shrubs. Stem jointed. Leaves opposite, 

 undivided, stipulate. Flowers in cymes, bracteolate, regular, hermaphrodite. 

 Calyx 4 — 5-lobed or -cleft, valvate in bud. Petals 4 — 5, hypogynous, free or 



