OKDER CXI. MORACE^. 503 



nearly sessile. Stamens 5 — 7. Stigmas purple. Buds tomentose. 

 Fruit pubescent. — ^ . Feb. — March. In fertile lands. 20 — 30 feet. 



Slippery Elm. 



3. U. ala'ta, (Mich.) A middle-sized tree or shrub, with a cork-like 

 excrescence on opposite sides of the branches. Leaves nearly sessile, 

 oblong-lanceolate, doubly serrate. Samara pubescent, ciliate. — ^ . Feb. 

 March. Fertile soils. 10 — 30 feet. Whahoo. 



Geni-3 II.— PLAX'ERA. Mich. 5—2. 

 (In honor of John Planer, a German botanist) 



Flowers perfect. Perianth campanulate, 3 — 5-cleft. Sta- 

 mens 5. Stigmas 2. Nut 1 -seeded, roughened. 



1. P. Gmeli'ni, (Mich.) A middle-sized tree. Leaves ovate, acute, 

 glabrous, serrate. Floicers axillary, generally by threes. Perianth 

 3 — 5-cleft. Stamens 3 — 5. Stigmas 2, plumose. Nut roughened. — ^ . 

 Feb. — March. River swamps. 30 — 10 feet. 



Gexus III.— CEL'TIS. L. 23—1. 

 (An ancient name for Lotus.) 



Flowers perfect. Perianth 5 or 6 parted. Stamens 5 or 6. 

 Styles 2, expanding. Drupe small, purple. 



1. C. occtdexta'lis, (L.) A large tree. Leaves ovate, acuminate, ser- 

 rate, unequal at the base, pubescent beneath. Flowers small. Fruit a 

 small berry, with a sweet pulp. — ^ . April — May. Rich soils. 60 — 80 

 feet. Beaver-wood. Sugarberry-tree. 



Order CXI.— MORA'CEJS. (Artocarpacea;.) {Mulberry 

 Tribe.) 



Flowers monoecious, in aments or heads. Perianth usually 

 divided, sometimes tubular or entire. Stamens 4, straight. 

 Ovary 1 or 2 celled, with a suspended ovule. Style 1, filiform. 

 Stigma bifid. Fruit a fleshy receptacle, covered by numerous 

 nuts. Seed suspended, solitary. Trees or shrubs. 



Gexcs I— MO'RUS. Tourn. 19—4. 

 (ITorea, the Greek name of mulberry.) 



Flowers monoecious or dioecious, in spikes. Sterile florets 

 with a 4-parted perianth; stamens 4. Fertile florets in dense 

 spikes, with a 4-parted perianth, which becomes succulent, en- 

 veloping the achenium, and forming an" oblong, juicy, edible 

 fruit. Trees with milky juice. 



1. M. alba. Monoecious. A small tree. Leaves deeply cordate, un- 

 equal at the base, unequally serrate, nearly glabrous. — **? . May ; 

 Introduced. White Mulberry. 



j. M. rubra. Dioecious. A large tree. Leaves cordate, ovate, acu- 

 minate, serrate, scabrous, pubescent beneath. Perianth 4-parted. be- 

 coming juicy. — h. March. Rich soils. 20 — 60 feet. Red Mulberry. 



