POLYPETALOUS EXOGENOUS PLANTS. 291 



opening at the summit; seeds anatropous, bony, 1-2 in 

 each cell ; emhryo large and straight, in scarce albumen. 



SYNOPSIS. 



Calyx-lobes andpetcds 4. Fertile stamens 4. Ovules solitary in each cell, suspended. 



HA3IA5IELI3. 



Calyx and corolla none. Flowers polygamous or monoecious, capitate. Stamens 

 numerous. Ovules several Liquidambak. 



HAMAMELIS, L. Witch-Hazel. 



Calyx 2-3-bracted, 4-parted ; petals 4, long and linear ; 

 stamens 8, the alternate ones short and sterile; styles 2; 

 capsule loculicidally 2-Yalved at the apex, the outer coat 

 separating from the inner one, which encloses the seed, but 

 soon splits elastically into 2 valves; seeds large, bony. — 

 Shrubs J leaves short-petioled ; floiuei^s jellow, clustered. 



H. ViRGiNiCA, L. A large shrub; leaves obovate or 

 oval, oblique, crenate-toothed, pubescent ; /ow^rs appearing 

 when the leaves are falling. 



LIQUID AMBAK, L. Sweet-Gum. 



Flowers monoecious, in globular 4-bracted spiked heads ; 

 calyx and corolla none; stamens very numerous; styles 2; 

 ovary 2-celled, with numerous ovules in each cell; capsule 

 united in a close head, woody, 2-beaked, opening between 

 the beaks, 1-2-seeded; seeds wing-angled. — Trees; heads 

 of ?>iQY\\Q. flowers sessile, crowded, those of the fertile flowers 

 on long nodding peduncles. 



L. STYRACIFLUA, L. Branches with corky wings ; leaves 

 roundish, with 5-7 acuminate serrate spreading lobes. — A 

 large tree. The exposed juice hardens into a fragrant gum. 



