POLYPETALOUS EXOGENOUS PLANTS. 1G9 



celed. Dry soil. Steins and branches stouter than the 

 last. Stamens 10-20. July-August. 



Elodea. 



Sepals 5. Petals 5, equal-sided, imbricated in the bud. 

 Stamens mostly 9, and united in sets of three, with a scale- 

 like between each set ; styles 3 distinct. Capsule 3-celled, 

 3-valved, many-seeded. Smooth perennial herbs. Flowers 

 rose-colored, in contracted lateral and terminal cymes. 



20. BALSAM-TEEE FAMILY. Order, Clusiace^. 



Trees or shrubs, with resinous yellow juice; opposite, 

 coriaceous, entire, dotless leaves articulated with the stem, 

 and regular hypogynous floiuers. Sepals 3-6. Petals 4-9. 

 Stamens mostly numerous, distinct or variously united. 

 Ovary 1-many-celled, few-many- ovuled. Style single, often 

 none. Fruit capsular, baccate or drupaceous. Seeds with- 

 out albumen. Embryo straight. Cotyledons thick, dis- 

 tinct or united. 



Clusia. 



Calyx 2-bracted, of 6 imbricated, colored sepals. Petals 

 4-9. Stamens numerous, the filaments united at the base 

 into a thick and fleshy tube. Ovary 5-15-celled. Ovules 

 numerous, fixed to a central column. Stigma large, radiate- 

 peltate. Capsule coriaceous, globose-angled, 5-15-celled; 

 the valves separating from the central column at maturity. 

 Seeds numerous, ovate. Parasitical tropical trees, with 

 thick opposite, entire and shining leaves, and chiefly po- 

 lygamous cymose showy flowers. 



Canella, p. Brown. 



Sepals 3, rounded, concave, imbricated in the bud, per- 

 sistent. Petals 5, hypogynous, oblong, convolute in the 



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