ULMACE^E. 333 



lobes. Ovaries 3-celled, 2 abortive. Styles 3. 

 seeded, invested by the enlarged involucre. 



' Monoecia. Potyandria. 



1. F. -sylvatica Linn. : leaves ovate, acuminate, slightly toothed, cili- 

 ate on the margin, acute at base ; nut ovate, ^triquetrous, obtuse, but 

 muconate. F. sylvestris Mich. ' . 



HAB. Woods. N. H. 'to Geor. May. J? .A large and beauti- . 

 ful tree. Leaves of* a bright green. According to Mr. Nuttall 

 this species is dioecious. White Beach. 



2. F.ferruginea Ait. : leaves ovate-oblong, acuminate, pubescent be-/ 

 neath, coarsely toothed, obtuse and unequally subcordate at base ; nut 

 acutely triquetrous, very acute. 



HAB. Woods. Throughout the N. S. May, June. ^>. A large 

 tree, with smooth bark. Leaves ribbed. Fruit muricate. The 

 wood rs> of a darker colour than the preceding* Both species . 

 are highly valuable timber trees, although the wood is not very 

 durable. Red Beach, 



ORDER CXII. ULMACEJB. Mirb. Lind. 



Flowers monoclinous or polygamous. Ptrianth divided^ 

 carhpanulate, inferior. Stamens definite, inserted into the 

 base of the calyx erect in aestivation. Ovary superior, 2- 

 cellfid ; ovules solitary, pendulous ; stigmas 2, distinct. 

 Fruit 1 or 2-celled, indefinite, membranous or drupaceous, 

 Seed solitary, pendulous ; albumen none or small in quantity * r 

 embryo with foliaceous cotyledons. 



Trees or sJirubs with scabrous Alternate* sim.ple deciduous 

 leaves and stipules. ' 



. .' ' 



1-. ULMUS. Linn. 



Flowers perfect. Perianth campanulate,'4 5-cleft. Sta- 

 mens 5 8. Styles. 2. Fruit compressed, with a broad mem^ 

 branaceous border, (Sa'mara.} Pentfin.dria. Digynia. 



1 . U. americana Linn. : ' branches smooth v leaves somewhat doubly 

 serrate, unequal at the base ; serratures uncinately acuminate ; flowers 

 pedicellate ; fruit fimbriate. 



HAB. Low grounds. N. Y. to Car. W. to Miss. 1 April, May. 

 l?. A large tree, with long recurve'd branches. Flowers pur- 

 plish, in. small fascicles, generally appearing before the leave? . 

 Stamens from 4 - 8. In favorable situations the most magnifi- 

 cent tree on the continent: White Elm. 



2, U.fulva ]&ich. : branches scabrous, white ; leaves ovate-oblong, 

 much acuminate, pubescent on both sides ; buds tomentoae, with a 

 thick tawny wool j flowers sessile. 



