XXXii SYNOPSIS OF GENERA. 



3 on each filament. Fert. fl. Catkin hairy. Seed 1, on a hairy stalk. Ty- 

 phacece, p. 2G2. 



Sparganium. Barr. fl. Cal. 3-leaved. Cor. none. Fert. fl. Cal. 3- 

 leaved. Cor. none. Drupe dry. Typhacece, p. 263. 



Carex. Barr.fl. Catkin imbricated. CaZ. a scale. Cor. none. Jlerf. 

 ^?. Catkin imbric. Cal. a scale. Cor. a hollow permanent ^/ume, investing 

 the loose seed. Cyperacece, p. 325. 



Order IV. Tetrandria. Stamens 4. 



Littorella. Barr. fl. Cal. 4-leaved. Cor. 4-cleft. Stam. capillary, 

 very long. Fert. fl. Cal. none. Cor. unequally 3- or 4-cleft. Style very 

 long. Nut of 1 cell. Plantaginece, p. 176. 



Urtica. Barr. fl. Cal. 4-leaved. Pet. none. Nect. central, cup-shaped. 

 Stam. the length of the calyx. Fert. fl. Cal. 2-leaved. Cor. none. Seed I, 

 superior polished. Urticeo?, p. 232. 



Alnus. Barr.fl. Cal. scale of a catkin, permanent, 3-flowered. Cor. 

 deeply 4-cleft. Fert. fl. Cal. scale of a catkin, permanent, 2-flowered. 

 Cor. none. Styles 2. Nut compressed, without wings. Amentacea, 

 p. 242. 



(See Eriocaulon in Ord. VI. Myrica in CI. xxii.) 



Order V. Pentandria. Stamens 5. 



Xanthium. Barr.fl. Common Cal. imbricated, many-flowered, with 



intermediate scales. Cor. of 1 petal, funnel-shaped, 5-cleft. Fertile fl. 



Cal. of 2 leaves, with 2 flowers. Cor. none. Drupe spurious, coated with 



the prickly calyx, cloven. Nut of 2 cells. Composite, p. 153. 



(See Fagus and Quercus in Ord. Polyandria. Atriplex in CI. Polygamia.) 



Order VI. Hexandria. Stamens 6. 



Eriocaulon. Common Calyx imbricated, many-flowered. Barr. fl. 

 in the middle. Cal. in 6 or 4 deep segments. Stam. 6, 4, or 3. Fert. fl. 

 in the circumference. Pet. 6 or 4. .%/e 1. Caps, superior, 2- or 3-lobed. 

 Seeds solitary. Restiacece, p. 289. 



(See Quercus in Ord. Polyandria.) 



Order VII. Polyandria. Many Stamens. 



Myriophyllum. Barr.fl. Cal. 4-leaved. Pet. 4. Stam. 8. Fertile 

 fl. Cal. 4-leaved. Pet. 4. Stigmas 4, sessile. Drupes 4. Ilaloragece, 

 p. 112. 



Poterium. .Barr. j?. Cal. 3-leaved. Cor. deeply 4-cleft. Stam. 



30 50. /"erf. fl. Cal. 3-leaved. Cor. deeply 4-cleft. Pistil 1 or 2. Nut 



coated, of 1 or 2 cells. Rosacea, p. 106. 



Sagittaria. Barren fl. Cal. 3-leaved. Pet. 3. Stam. about 24. 

 Fert. fl. Cal. 3-leaved. Pet. 3. Pist. numerous. Seeds numerous, bor- 

 dered. Alismacea, p. 271. 



Ceratophyllum. Barr. fl. Cal. many-cleft. Cor. none. Stam. 

 16 20. Fert. fl. Cal. many-cleft. Cor. none. Stigma nearly sessile, ob- 

 lique. Drupe compressed. Ceratophyllece, p. 239. 



Fagus. Barr. fl. in a catkin. Cal. in several segments. Cor. none. 

 Stam. 5— -20. Fert.fl. Cal. double; outer inferior, prickly, in several doep 

 segments, 2- or 3-flowered ; inner superior, 5- or 6-cleft, Cor. none. Styles 



