CLASS XIX. 



valves increased by cultivation ;) style 1, very long, filiform, pendu- 

 lous; seed solitary, immersed in an oblong receptacle. (Indian corn.) 



Order 4. Tetrandria. Four stamens. 



MO'RUS. Staminate flowers calyx 4-parted; corolla 0. Pistillate 

 flowers calyx 4-leaved ; corolla ; styles 2, calyx becoming berry- 

 like; seed 1. (mulberry.) 



Order 5. Pentandria. Five stamens. 



AMARA"NTHUS. Staminate flowers calyx 3 or 5-leaved ; corolla 0; 

 stamens 3 or 5. Pistillate flowers calyx and corolla as the Stami- 

 nate; styles 3; capsule 1-celled, opening transversely ; seed 1. (ama- 

 ranth, red cockscomb.) 



Order 12. Polyandria. Many stamens. 

 A. Stems not icoodij. 



SAGITTA'RIA. Staminate flowers calyx 3-leaved; corolla Spetaled; 

 filaments mostly 24. Pistillate flowers calyx and corolla as in the 

 Staminate ; germs many ; capsules aggregate, 1-seeded, not opening 

 (arrow-head.) 



AR'UM. Spalha cucullate, 1-leaved ; spadix not entirely covered 

 with fructification ; being more or less naked above, with pistillate 

 flowers beneath, and Staminate in the middle (sometimes a few are sta- 

 minate beneath ; berry mostly 1-seeded, generally cirrose glandular 

 beneath.) (Indian turnip, wake-robin.) 



B. Stems moody. 



GIIIER'CCJS. Staminate flowers ament loose; calyx sub 5-cleft ; co- 

 rolla 0; stamens 5 to 10. Pistillate flowers calyx 1-lealed, entire, 

 scabrous, being a woody cup ; style 1, stigma 2 to 5; nut or acorn 1- 

 celled, 1-seeded, coriaceous, surrounded at the base by the permanent 

 calyx. (oak.) 



CASTA'NEA. Polygamous. Staminate flowers ament naked, linear : 

 corolla (or calyx) 1-leaved, 5 or G-parted ; stamens 10 to 20. Pistillate 

 flowers calyx 5 or 6-leaved. (or 5 or G-lobed) muricate ; germs 3 ; stig- 

 ma pencil-form ; nuts 3, with coriaceous putamen, enclosed in the 

 calyx, becoming echinate. (chestnut.) 



Order 15. Monadtlphia. Filaments united. 



A. Stems not woody. 

 Exotic. 



CUCUR'BITA. Staminate flowers calyx 5-toothed ; corolla 5-cleft ; 

 filaments 3. Pistillate flowers calyx and corolla like the Staminate; 

 pistil 3-clefr ; pomaceous berry large, 3 to 5-celled ; seeds thickened at 

 the margin. (gourd, squash, pumpkin, water-melon.) 



RICINUS. Staminate flowers calyx 5-parted: stamens numerous. 

 Pistillate flowers, calyx 3-parted: styles 3or4-cleft : capsules echinate, 

 3-celled, 3-seeded. (castor-oil plant.) 



