FLORA OF MICHIGAN. 49 



Sambucus Canadensis, !L. Elder. 



'* racemosa, L. Elder. 



Spartina cynosuroides, Willd. Cord-Grass. 

 Viburnum. Any of our native species near at hand. 



PLANTS FOR CARP PONDS. 



Elodea Canadensis, Michx. Water-weed. 

 Qlyceria fluitans, R. Br. Manna-Grass. 

 Lemna minor, L. Duckweed. 



" trisulca, L. Duckweed. 



Potamogeton. Any of our numerous species. Pondweed. 

 Ranunculus aquatilis, L., and its varieties. Water-Crowfoot. 



" multifidus, Pursh. Water-Crowfoot. 



Sagittaria variabilis, Engelm. Arrow-head. 

 Spirodela polyrrhiza, Schleid. Duckweed. 

 Spirogyra. Several species. Pond Scum. 

 Vallisneria spiralis, L. Eel-grass. 

 Vaucheria. Several species of green pond weeds. 

 Wolffia Brasiliensis, Weddell. 



" Columbiana, Karsten. 

 Zizania aquatica, L. Wild Rice. 



There are several species of low, flowerless plants which would be 

 valuable in this connection. 



Uiricularia vulgaris, L., Bladderwort, and some other species of this 

 genus have been employed, but within a few years it has been ascertained 

 that the small bladders catch and kill the young fish when very small. 



NATIVE TREE-LIKE OR LiRGE SHRUBS. 



The following list of woody plants includes those about which there 

 may be a difference of opinion as to whether they rank as trees or as 

 shrubs. Several that are mere shrubs in our State certainly rank as trees 

 when well grown on rich land in many of the States south of us. This 

 list numbers thirty species. 



Acer spicatum, Lam. Mountain Maple. 



Alnus incana, Willd. Speckled Alder. Hoary Alder. Black Alder. 



" serrulata, Willd. Smooth Alder. Black Alder. 

 Asimina triloba, Dunal. Papaw. Custard Apple. 

 Cercis Canadensis, L. Red-bud. Judas-Tree. 

 Cornus alternifolia, L. f. Dogwood. 



" circinata, L'Her. Dogwood.* 



Cratcegus coccinea, L. Scarlet Hawthorn. Red Hawthorn. White Thorn. 

 Crus-galli, L. Cockspur Thorn. Newcastle Thorn. 

 tomentosa, L. Black Thorn. Pear Haw. 



Euonymus atropurpureus, Jacq. Burning-Bush. Waahoo. Spindle-tree. Arrow- 

 wood. 



Hamamelis Virginicd, Li. Witch-hazel. 

 Prunus Americana, Marshall. Wild Plum. Canada Plum. Horse Plum. 



" Virginiana, L. Choke-Cherry. 



Ptelea trifoliata, L. Hop-tree. Shrubby Trefoil. Wafer Ash. 

 Quercus prinoides, Willd. Chinquepin Oak. 

 Rhus copallina, L. Dwarf Sumach. 

 " glabra, L. Smooth Sumach. 

 " typhina, L. Staghorn Sumach. 

 " venenata, DC. Poison Sumach. Poison Dogwood. 

 Salix discolor, Muhl. Glaucous Willow. 

 " longifolia, Muhl. Sand-bar Willow. 

 " lucida, Muhl. Shining Willow. 

 Sambucus Canadensis, L. Common Elder. 

 " racemosa, L. Red-berried Elder, 



