xxxu linnjEAN synopsis of genera. 



153. ViscuM. Cor. 4-parted. Cal. of male fl. 0, of fem. fl. an 

 obscure free margin. Stam. 4. Stigma obtuse, sessile. 



307. Myrica. Fl. in catkins. Perianth 0. Stam. 4, at the 

 base of the scales. 



295. HuMULUS. Female fl. in a catkin formed of large persist- 

 ent scales. Stam. 5. 



312. Tamus. Perianth 6-parte(l, superior. Stam. 6. 



306. PopuLUS. Fl. in imbricated catkins. Stam. 8. 



2.92. Mercurialis. Perianth single, 3-parted. Stam. 9. 



312. Hydrocharis. Cal. 3-parted, superior. Pet. 3. Stam. 9. 



313. Stratiotes. Cal. 3-parted, superior. Stam. 12. 



313. Anacharis. Cal. 3-parted, inferior, with a long tube. 



Filaments 3. Caps. 1-celled. Male with 9 stamens with 



combined filaments. 

 310. JuNiPERUs. Stam. 5, combined. Fl. in catkins. Fem. 



fl. 3, scales ultimately fleshy and united. 

 310. Taxus. Stam. 5, combined. Fl. in catkins. Fem. fl. 1, 



scaly below. Perigone ultimately fleshy, cupshaped. 



(Stam. 3. Valeriana, N. 0. 43. Stam. 4. Rhamnus, N. O. 

 24. [7rtica,N.0.75. Stam.8. SedMm,N.0.34. Stam. 

 12. Stratiotes,'N. 0.81.) 



Class XXIII. POLYGAMIA. 



278. Atriplex. Perigone 2-lobed or 2-parted. Pericai-p free. 



Testa crustaceous. 

 280. Obione. Perigone 2-lobed. Pericarp adhering to the 



perigone. Testa membranous. 

 294. Parietaria. Perigone 4-parted. 



Class XXIV. CRYPTOGAMIA. 



414. Nat. Order 98. Eouisetace^. Leafless branched plants 

 with sheathed joinings. Fructification in terminal catkins 



417. Nat. Order 99. Filices. Leafy plants. Fructification 

 attached to the vems, either on the back or edge of the 

 leaves. 



429. Nat. Order 100. Marsileace^. Creeping plants with 



slender leaves. Fructification consisting of globular nearly 

 sessile coriaceous 3— 4-celled capsules. 



430. Nat. Order 101. Lycopodiacejs. Plants with imbricated 



leaves. Capsules axillary, solitary. 



431. Nat. Order 102. Charace^. Leafless branched plants 



with a fistular stem, not sheathed at the joinings 



