MON(ECIA. 257 



Fertile Vl, Scale of the catkin subtrifid, with 2 flowers. 

 Perinnth 0. Styles 2. Fruit compressed. 



{Myrica. Moncec.) 



4. PENTANDRIA. 



11. Bryonia. Barren Fl. Calyx 5-dentate. Cor. 5-cleft. 

 Fiiaments 3. Anthers 5. 



Fertile Fl. Ca/y:): 5-dentate. Cor. 5-cleft. S/i/Zetrifid. 

 Berry inferior, globose, many-seeded. 



{Fagus sylvat. Ouercus. Ord. Polyand. 

 Atriplex portulacoides. Polygam.) 



(HEXANDRIA.) 

 {Quercus. Ord. Polyand.) 



5. POLYANDRIA. 



13. Myriophyllum. Barren Fl. Calyx o? 4 leaves. Petals 4, 

 Stem. 8. 



Fertile Fl. Calyx of 4 leaves. Petals 4. Stigmas 4 j ses- 

 sile. Nuts 4, subglobose, 1 -seeded. 

 15. PoTERiuM. Barren Fl. Ca/. of 4 leaves. Cor. 4-partite. 

 Stam. 30—40. 



Fertile Fl. Cal. of 4 leaves. Cor. 4-partite. Germens 2. 

 Fruit 2-celled, invested with the cal. 



12. Ceratophyllum. Barren FL Cal. multipartite. Cor. 0. 

 Stam. 16—20. 



Fertile Fl. Cal. multipartite. Cor. 0. Stigma nearly ses- 

 sile, oblique. Nut 1 -seeded. 



18. Fagus. Barren Fl. in a globose calkin. Permn/A single, 

 of 1 leaf, campanulate, 6-cleft. Stam. 5 — 12. 



Fertile Fl. 2, within a 4-lobed prickly involucre. Perianth 

 single, urceolate with 4 — 5 minute lobes. Germen incorpo- 

 rated with the perianth, 3-celled, 2 of them becoming abor- 

 tive. Styles 3. Nuts 1 -seeded, invested with the enlarged 

 hwokicre. 



17. Castanea. Barren Fl. in a very long cylindrical catkin. 

 Perianth single, of I leaf, 6-cleft. Stam. 5—20. 



Fertile Fl. 3, within a 4-lobed, thickly muricated involucre. 

 Perianth single, urceolate, 5 — 6-lobed, having the rudiments 

 of 12 stam. Germen incorporated with the perianth, 6-celIed, 

 with the cells 2-seeded, 5 of them mostly abortive. Styles 6. 

 Nuty 1 — 2-seeded, invested with the enlarged involucre. 



US. Quercus. Barren Fl. in a lax catkin. Perianth single, 

 somewhat 5-cleft. Stam^5 — 10. 



Fertile Fl. Involucre cup-shaped, scaly. P&rianth single, 

 incorporated with the germen, 6-lobed. G&rmen 3-celled, 2 



