SYNOPSIS OF GENERA. XXXlll 



5 or 6. Nuts 2 or 3, loosely invested with the spreading outer calyx. Amen- 

 tacece, p. 254. 



CASTANEA. See Amentaceee, p. 255. 



QUERCUS. JBarr. fl. in a catkin. Cal. in several segments. Cor. none. 

 Stam. 8 or more Fert. fl. Cal. double ; outer 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. Amentacece, 

 p. 255. 



CORYLUS. Earr.fi. in a catkin. Cal. a 3-cleft scale. Cor. none. 

 Stam. 8 or more. Fert. fl. Cal. double ; outer inferior, divided ; inner 

 superior, obsolete. Cor. none. Styles 2. Nut solitary, bony, invested with 

 the enlarged, coriaceous, jagged outer calyx. AmentacecR, p. 256. 



CARPINUS. JBarr. fi. in a catkin. Cal. a rounded scale. Cor. none. 

 Stam. 10, or more. Fert. fl. Cal. double ; outer inferior, of several deci- 

 duous scales ; inner superior, in 3 deep, sharp segments, permanent. Cor. 

 none. Styles 2. Nut ovate, angular, naked. Amentacece, p. 256. 



BET u LA. Barr. fl. in a catkin. Cal. a ternate scale. Cor. none. 

 Stam. 10 12. Fert. fl. in a catkin. Cal. a peltate, 3-lobed, 3-flowered 

 scale. Cor. none. Styles 2. Nut winged, deciduous. Amcntaceae^ p. 242. 



ARUM. Common Cal. a sheathing leaf, enclosing a common stalk, naked 

 above. Cor. none. Barr. fl. Stam. numerous, in a dense ring, surmounted 

 by another ring of abortive filaments. Fert. fl. Germ, numerous, in a dense 

 ring, below the stamens, sessile. Styles none. Stigmas downy. Berry with 

 several seeds. Aroideee, p. 261. 



Order VIII. MONADELPHIA. Stamens united into one set. 



PINUS. Barr. fl. in a catkin, naked. Stam. numerous, on a common 

 stalk. Fert. fl. in a catkin, of close, rigid, 2 -lipped, 2 -flowered scales. Seeds 

 2 to each scale, winged. Coniferce, p. 258. 



Class XXII. DICECIA. Stamens and Pistils in separate flowers, 

 on different plants. 



(MONANDRIA. 1 Stamen. For some Salices see Ord. II.) 

 Order I. DIANDRIA. Stamens 1 5, mostly 2. 



SALIX. Barr. fl. Catkin imbricated. Cal. a scale. Pet. none. Nect. 

 1 or more glands, at the base. Stam. 1 5. Fert. fl. Catkin imbricated. 

 Cal. a scale. Pet. none. Nect. as in the barren fl. Stigm. 2. Capsule 

 superior, of 1 cell, and 2 valves. Seeds tufted. Amentacea, p. 243. 



Order II. TRIANDRIA. Stamens 3. 



EMPETRUM. Barr. fl. Cal. in 3 deep segments. Pet. 3. Stam. ca- 

 pillary, 39. Fert. fl. Cal. in 3 deep segments. Pet. 3. Stigm. 9. 

 Berry superior, with 9 seeds. Empetrece, p. 238. 



(See Valeriatw, dioica in Cl. III. Some Salices in Ord. I.) 



Order III. TETRANDRIA. Stamens 4. 



MYRICA. Barr. fl. in a catkin. Cal. a concave scale. Cor. none. 

 Fert. fl. m a catkin. Cal. a concave scale. Cor. none. Styles 2. Bcny 

 superior with 1 globular seed. MyricecK, p. 25?. 



e 



