366 CLASS XIX. ORDER XII. 



* Southern. 



ZE'A. Staminate flowers calyx glume 2 flowered, awnless ; corolla ghmro 

 awnless. Pistillate flowers calyx glume 2 valved (number of valves increased 

 by cultivation) ; style I , very long, filiform, pendulous ; seed solitary, immer- 

 sed in an oblong receptacle. 4. 10 (Indian corn). 



ORDER IV. TL-TRANDRIA. 



Ax"vus. Staminate flowers ament composed of wedge form, truncate 3 

 flowered receptacles ; calyx a scale, 3 lobed ; corolla 4 parted. Pistillate flow- 

 erscalyx 2 flowered scales, somewhat 3 cleft ; corolla ; seed compressed 

 ovate, wingless. 50. 99 (alder). S. 



UR"TICA. Staminate flowers calyx 4 leaved ; corolla ; nectary central, 

 cyathiform. Pistillate flowers calyx 2 leaved (2 valved) ; corolla 0: seed 1, 

 glossy. 53. 98 (nettle). S. 



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

 calyx 4 leaved ; corolla ; styles 2, calyx becoming berry-like ; seed 1. 53. 

 98 (mulberry). 5. 



ORDER V. PKNTANDRIA. 



AMARAN"THUS. Staminate flowers calyx 3 or 5 leaved ; corolla ; sta- 

 mens 3 or 5. Pistillate flowers calyx and corolla as the Staminate ; styles 3; 

 capsule 1 celled, opening transversely ; seed 1. 54.- 30 (amaranth, red 

 cockscomb). S. 



AMBRO'SIA. Staminate flowers common calyx 1 leaved ; anthers in con- 

 tact but not united ; corolla 1 petalled, '> cleft, funnel form ; receptacle naked. 

 Pistillate flowers calyx 1 leaved, entire, the swelling part 5 toothed, 1 

 flowered; corolla ; nut from the indurated calyx 1 seeded. 54. 98 (hog- 

 weed). 5. 



ORDER XII. POLTANDRIA. 



A. Stems not tcoody. 



SAGITTA'RIA. Staminate flowers calyx 3 leaved ; corolla 3 petalled ; 

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

 minate ; germs many ; capsules aggregate, 1 seeded, not opening. 5. 13 

 (arrow-head). S. 



AR"CM. Spatha cucullate, 1 leaved ; spadix not entirely covered with the 

 fructification ; being more or less naked above, with pistillate flowers be- 

 neath, and Staminate 'in the middle (sometimes a few are Staminate beneath ; 

 berry mostly 1 seeded, generally cirrose glandular beneath). 2. 7 (Indian 

 turnip, wake-robin). S. 



CAL"LA. Spatha ovate, becoming expanded ; spadix covered with the fruc- 

 tification ; stamens intermixed. Staminate flowers calyx and corolla ; an- 

 thers sessile. Pistillate flowers calyx and corolla ; berries 1 celled many 

 seeded, crowned with the short style. 2. 7 (water arum). 



EUPHOR"BIA. Involucrum perianth like, inflated, with alternating petal like 

 segments. Staminate florets 12 or more, at the base of the stipe of the pistil- 

 late flower, each consisting of an anther united to a pedicel by a filament. Pis- 

 tillate flower central, single, stiped ; with three 2 cleft styles ; capsule 3 lobed. 

 38. 96 (caper, spurge). S. 



Exotic. 



POTF.'RIUM. Staminate flowers calyx 4 leaved ; corolla 4 parted ; stamens 

 30 to 50. Pistillate flowers calyx and corolla like the Staminate ; pistils 2 ; 

 berry from the indurated tube of the corolla. 54. 92 (burnet). 

 B. Stems woody. 



QUKR"CUS. Staminate flowers ament loose ; calyx sub 5 clefl ; corolla ; 

 ttamens 5 to 10. Pistillate flowers calyx 1 leafed, 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. 50. 99 (oak). <S. 



COR"YLUS. Staminate flowers ament cylindric, imbricate ; calyx a 3 cleft 

 fccale ; pericarp none ; stamens about 8. Pistillate flowers calyx 2 parted, la- 

 cerated ; stigmas 2 ; nut ovate, surrounded by and included in the permanent 

 leaf. like calyx. 50. 99 (hazlenut). . 



FA'GUS. Staminate flowers ament roundish : calyx 5 or 6 cleft, bell-form : 

 stamens 5 to 12. Pistillate flowers calyx 4 toothed, setose : germs 2: nuts 

 2, inclosed in the calyx, becoming coriaceous echinate. 50. 99 (beech). N. 



CASTA'NKA. Polygamous. Staminate flowers ament naked, linear : coroi- 



