Celtis. CXVI. ULMACEiE. 483 



the ends of the young shoots. Calyx downy, sessile. Stamens short, reddish, 7 

 in number. April. 



3. U. RACEMOSA. Thomas. Cork Elm. 



Lis. ovate, acuminate, aiuiculate on one side; Jls. in racemes; pedicels in 

 distinct fascicles, united at their base. — A tree found in Meriden, N. H. ! to 

 N. Y. ! The twigs and branches are remarkably distinguished by their nume- 

 rous, corky, wing-like excrescences. Leaves 3 — V long, | as wide, produced 

 into a rounded auricle on one side, doubly serrate, sruooth above, veins and 

 mider surface minutely pubescent. Flowers pedicellate, 2 — 4 in each of the 

 fascicles which are arranged in racemes. Calyx 7 — 8-clelt. Stamens 7 — 10. 

 Stigmas recurved. Samara ovate, pubescent,- the* margin doubly fringed. 



4. U. CAMPESTRis. English Elm. — Z/i:s. (small) ovate, doubly serrate, unequal 

 at base ; Jls. subscssile, densely clu.stered ; sfa. 5 — 8 ; cal. segments rounded, ob- 

 tuse; samara suborbicular, the border destitute of a fringe of hairs. — From 

 Europe. Introduced and naturalized in the Eastern States to a small extent. 

 It is a majestic tree, 50 — 70f high. The main trunk is 2 — 4f diam. at base, 

 usually prolonged to the summit. The bark is more rough and broken than 

 that of the American elm, the branches more rigid and thrown off at a larger 

 angle, the foliage more dense, consisting of smaller and darker-colored leaves. 

 In form it favors the oak more than our ov/n native elms. Many trees of this 

 kind, in the vicinity of B.oston, are particularly mentioned in Emerson's Report, 

 pp. 301,302. 



5. U. MONTANA. Scotch Elm. Wijch Elm. — Lvs. doubly serrate, unequal at 

 base; Jls. pedicellate; sta. G — 8; samara "wiiYi the margin fringed. — Another 

 European elm, often attaining an enormous size. The timber is highly valua- 

 ble. In form it more nearlj^ resembles the slippery elm than the white elm. 



6. U. NEMORAtis. River Elm. 



Lvs. oblong, nearly .smooth, equally serrate, nearly equal at the base ; /.•;. 

 sessile. — Banksof rivers, N. Eng. to Virginia, according to Pursh, Fl. p. 200, 

 hut imknown to any subsequent botanist. 



2. CELTIS.. 



Cellis was the ancient name for the lotus, which this genus is said to resemble. 



Flowers monoecious-polygamous, c? Calyx 6-parted ; stamens 6. 

 5 Calyx 5-parted ; stamens 5 ; styles 2 ; stigmas subulate, elongated, 

 spreading ; drupe 1 -seeded. — Trees or large shrubs. Lvs. moslly 

 oblique at base. Fls. subsolitary., axillary. 



1. C. OCCIDENT Ai.is. American Nettle Tree. Hnop Ash. Beaver Wood. 

 Lvs. ov^ate, acuminate, entire and unequal at base, serrate, rough above, 



and rough-hairy beneath; //•. solitary. — This species is some 30f high in New 

 England, where it is rarely found, but is much more abundant at the South 

 and West. The trunk has a rough, but unbroken bark, v/ith numerous slen- 

 der, horizontal branches. Leaves with a ver\'' long acumination, and remarka- 

 bly unequal at the base. Flowers axillary, solitary, small and white, succeeded 

 by a small, round, dull red drupe. The wood is tough, and is used for making 

 hoops, &c. 



2. C. CRAssiFOLiA. Lam. HacJcberry. 



* Lvs. ovate, acniminate, serrate, unequally cordate at base, subcoriaceous, 

 rough both sides ; ped. about 2-flowered. — This tree is thinly disseminated in 

 the northern parts of the U. S.- In woods it is distinguished by its .straight, 

 slender trunk, undivided to a great height, covered with an imbroken bai-k. 

 The leaves are of a thick and firm texture, very large, heart-shaped at base. 

 Flowers small, white, succeeded by a round; black drupe about the size of the 

 whortleberry. The wood is white and close-grained, but neither strong nor 

 durable. May. 



3. C. pcMiLA. Pursh. (C. occidentalis. /?. Muhl.) 



Lvs. broadly ovate, acuminate, equally .serrate, unequal at the base, smooth 

 on both surfaces, the younger only pubescent; ped. mostly 3-flowered ; /««< 

 solitavy. A small shrub, on the banks of rivers, Md., Va. Pursh. Leaves 

 41* 



