57 



FerL Jl. iti the circumference. Pet. 6 or 4. Style 1. 

 Caps, superior, 2- or 3-lobed. Seeds solitary. 



Rumices. Quercus. 



OrderVI. POLYANDRIA. Stam.l.ormore. 



438. MYRIOPHYLLUM. Barr. Jl. Col. 4-leaved. 



Pet. 4. Stam. 8. 

 Fert. jl. Cat. 4-leaved. Pet. 4. Stigm. 4, sessile. 

 Drupas 4. 



441. POTERIUM. Barr.f. Cal. 3-leaved. Cor. deeply 



4-cleft. Stam. 30-50. 

 Fert. Jl. Cal. 3-leaved. Cor. deeply 4-cleft. Pist. 

 1 or 2. Nut coated, of 1 or 2 cells. 



439. SAGITTARIA. Barr. Jl. Cal. 3-leaved. Pet. 3. 



Stam. about 24. 

 Fert. Jl. Cal. 3-leaved. Pet. 3. Pist. numerous. 

 Seeds numerous, bordered. 



437. CERATOPHYLLUM. Barr.Jl. Ca^. many-cleft. 

 Co7: none. Stam. 16-20. 

 Fert.Jl. Cal. many-cleft. Coi: none. Stigma nearly 

 sessile, oblique. Drupa compressed. 



443. FAGUS. Barr.Jl. in a catkin. Cal. in several seg- 

 ments. Cor. none. Stam. 5-20. 

 Fert.Jl. Cal. double ; outer inferior^ prickly, in se- 

 veral deep segments, 2- or 3-flowered ; m?i^r supe- 

 rior, 5- or 6-cleft. Cor. none. Styles 5 or 6. Nuts 2 

 or 3, loosely invested with the spreading outer 

 calyx. 



442. QUERCUS. Barr.Jl. in a catkin. Cal. in several 



segments. Cor. none. Stam. 8 or more. 

 Fert.Jl. Cal. double; ow/^r inferior, scaly, undivided ; 

 inner superior, in 6 deep segments. Cor. none. 

 Style 1 . Nut solitary, closely invested, at its base, 

 with the hemispherical outer calyx. 



446. CORYLUS. Barr.Jl. in a catkin. Cal. a 3-cleft scale. 

 Cor. none. Stam. 8 or more. 

 Fert.Jl. Cal. double ; outer inferior, divided ; inner 

 superior, obsolete. Cor. none. Styles 2. Nut soli- 

 tary, bony, invested with the enlarged, coriaceous, 

 jagged outer calyx. 



