CLASSES, &c. AND GENERA ARRANGED, cxxxi 



seeded, clothed vvith the hardened, four-angied tube of the calyx. 

 N. O. Rosacese. J.— Page 281. 



SiiGiTTA'RTA, Arroiv-liead. Stamen-hearing jloiver. Cat. three- 

 leaved. Cor. -pet. three. Stam. many, (about twenty- four.) 



Pistil-hearing floioer. Cal. three-leaved. Cor. -pet. three. Pistils, 

 very numerous collected into a head. Pericarps (seeds) one- 

 seeded, compressed, bordered. N. O. Alismaceee. RicJid. — 

 —Page 280. 



Ceratophyllum, Hornwort. Stamen-bearing flower. Cal. infe- 

 rior, many-cleft. Cor. none. Stam. sixteen to twenty. 



Pistil-hearing floiver. Cal. many-cleft. Cor. none. Germ. one. 

 Stig. nearly stalkless, oblique. Nut (drupe) superior, one- 

 seeded. N. O. Ceratophy'llese. Gray. — Page 279. 



Fagus, Beech, and Siveet Chestnut. Stamen-hearing flower, in a 

 catkin. Cal. one-leaved, in several segments. Cor. none. Stam-. 

 five to twenty. 



Pistil-hearing flower. Cal. double ; outer inferior, prickly, in seve- 

 ral deep segments, two, or three-flowered, inner calyx superior, 

 five, or six cleft. Cor. none. Styles five, or six. Nuts two, or 

 three, loosely clothed with the spreading- outer calyx. N. O. 

 Amentaceee. J. — Page 283. 



QuERCUS, OaJc. Stamen-hearing flower in a lax catkin or spike, 

 Cal. five, to seven -cleft. Stam. five, eight, or more. 



Pistil-bearing floiver. Cal. double; 02/z;er one, inferior, scaly, undi- 

 vided ; i)i7ier one superior, in six, deep segments. Cor. none. 

 Style one. Stig. three. Nut, (acorn,) one-celled, one-seeded, 

 closely invested at its base, with the hemispheric outer calyx. 

 N. O. Amentaceee. J. — Page 281. 



Co'RYLUS, Hazel-nut. Stamen-hearing flower in a cylindric catkin. 

 Cal. a three-cleft scale. Cor. none. Stam. eight, or more. 



Pistil-hearing Jlower. Cal. double ; o^lter one inferior, divided ; 

 inner one superior, scarcely distinguishable, (obsolete.) Cor. 

 none. Styles two. Nut solitary, bony, clothed with the 

 enlarged, leathery, jagged outer calyx. N. O. Amentacese. 

 J.— Page 284. 



Ca'RPINUS, Hornbeam. Stamen-bearing Jloiver in a cylindric catkin. 



Cal. a rounded scale. Cor. none. Stain, ten, or more. 

 Pistil-bearing floiver, in a lax catkin. Cal. double; outer one infe- 

 rior, of several deciduous (falling ofi") scales; inner calyx supe- 

 rior, in three, deep, sharp segments, permanent. Cor. none. 



