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OR >ER S UrticaCfae. (Nettle Family.) 



SUBORDER I. ULMACEAE. (The Elm Family.) 



Ulmus, L. (Elm.) 



Ulmus fulva, Michx. (Slippery or Red Elm.) A middle-sized tree, with 

 ovate-oblong leaves, (i — 8 inches long) which are very rough above, soft 

 downy or slightly rough underneath. Flowers nearly sessile ; fruit orbi- 

 cular. March, April. (Only few specimens are found.) 



Ulmus Americana, L. (American or While Elm.) A large and well known 

 ornamental tree, with spreading branches and drooping branchlets. The 

 leaves abovate-oblong, or oval, 2 — 4 inches long, soft pubescent beneath. 

 or soon glabrous ; flowers on slender drooping peduncles ; fruit ovate or 

 oval. April. (About 600.) 



Celtis, Touru. (Nettle-tree. Hackberry.) 

 Celtis occidentalis, L. (Sitgarberry. IlackLcrry.) A small or middle-sized 

 tree, with the aspect of an Elm, with ovate-lanceolate leaves, sweet and 

 edible fruits as large as bird-cherries, which are ripe in autumn. April, 

 May. (500.) 



SUBORDER II. ARTOCARPEAE. (Bread-fruit &c Fig Famihj.) 



Morns, Tourn. (Mulberry.) 



Morus rubra, L. (Red. Mulberry.) A small tree with milky juice ; leaves 



heart-ovate, (often variously lobed) ; fruit dark purple. May. (Scarce.) 

 Morus alba, L. ( White Mulberry.) A rather large tree ; leaves obliquely 

 heart ovate, smooth and shining. Fruit whitish. May. (Scarce.) 



Broussonetia, Vent. (Paper Mulberry.) 



Broussonetia papyrifera, Vent. A fine shade tree, to bo found now and 



then ix the vicinity of some private residences. 



SUBORDER ni. URTICEAE. (The true Xetlle Family.) 



Pilea, Lindl. .(Richweed. Clearweed.) 

 Pilea pumila. (Riclnceal. Clear weed.) Low, annual herb ; stem smooth and 

 shining ; leaves opposite, ovate, coarsely toothed. July — Sept. 



Boehmeria, Jacq. ( False Nettle.) 

 Boehmsria cylindrica, WiJld. Perennial herb, with opposite, long-petioled 



leaves ; flowers very small, whitish, in axillary spikes. July — Sept. 



Pafietaria, Tourn. (Pellitory.) 



Parietaria Pennsylvanica, Muhl. (American Pellitory.) Annual herb, 

 with alternate leaves. Flowers very small, shorter than the leaves of the 

 involucre. June — Aug. 



