AMENTACE^. 327 



O. virginica Willd.: leaves ovate-oblong,, cordate at the base, acu- 

 minate, unequally serrate ; strobile oblong-ovate,' erect ; huds acute. 

 Carpinus Ostrya Mich. ? . 



HAB.' Woods. Can. to Car. May. *>. A small tree with ex- 

 ceedingly hard and heavy wood. . Leaves alternate, ovate. Fer- 

 tile flowers enlarged into a sort of oblong cone resembling 'the 

 common hop. ' .Iron Wood, Hop Hornbeam. 



SUBORDER. IV. PLATANE^. 



9, -PLATANUS. 'Linn. 



Monoecious. Ament globose. STERILE FL. Stamens 

 numerous, intermixed with, linear scales. FERTILE FL. 

 Scales* spathulate. Styles with a recurved stigma. Seeds 

 roundish, clavate, pappose at base. Monoecia. Polydndrid. 



P. occidentalis Linn. : leaves 5-angled, obscurely lobed; toothed, pu- 

 bescent beneath ; branches nearly .white. _^"'i 



HAB. Banks of streams. Can. to Flor. and W. to Miss. 

 May. '. One of the largest trees jn North America, attain- 

 ing in favorable situations an enormous size. Leaves alternate, 

 on long petioles. Aments axillary, on long peduncles, globular. 



' Button Wood. Sycamore. 



10. LIQUIDAMBARv Linn. 



Monoecious. STERILE FL. Ament, conical, surrounded 

 by a 4-leaved involucre. Perianth none. jStamcns numer- 

 rous. FERTILE FL. Ament globose, Perianth 1-leaved, 

 urceolate, 2-flowered. Styles 2. -Capsules 2, surrounded at 

 base by the perianth, 1-celled, many-seeded. 



*" ;J Monoecia. Polyandria. 



L. styraciftua Linn. : leaves palmateiy lobed ; lobes acuminate, ser- 

 - rate, with t'ke sinuses at the base of veins yillous. 



HAB. ! -Low . woods. N. Y. to Flor. and W. to Miss. 'May. 

 T? . A tree sometimes attaining very large dimensions. Leaves 

 when bruised, fragrant, and exuding a gum which is pleasant 

 and slightly aromatic. ' Swevt Gum Tree. 



SUBORDER V. CUPULIFERjE. 



11. &TJERCUS, Linn. 



Monoecious. STERILE FL.' Ament loose. Perianth sin- 

 gle, mostly 5-cleft, Stamens 5 10. FERTILE FL. Cupule 

 cup-shaped, scaly. Perianth 6-lobed. Ovary 3-celled, 2 

 of them abortive. Style 1. Stigmas-3. Acorn 1-celled, 1- 

 seeded, surrounded at base bv the enlarged scaly cupule. 



Monoecia. Polyaridria. 



