54 BOTANY OF MADISON, LINCOLN, GARRARD, 



ORDER BETULACE^-BIRCH FAMILY. 



Genus Alnus, Alder. 



605. Smooth Alder, Alnus serrulata (Ait.) 



ORDER SAUCACBLE-WILLO'W FAMILY. 

 Genus Salix, Willow, 



606. , Salix tristis (Ait.) 



607. Black Willow, S. nigra (Marsh.) 



608. White Willow, S. alba (L.) 

 Genus Populus, Poplar. 



609. American Aspen, Populus tremuloides (Michx.) 



610. Necklace Poplar, P. monilifera (Ait.) 

 , P. balsamiferra (L.) 



611. Balm of Gilead, Yak. candicans (Ait.) 



612. Silver-leaf Poplar, P. -triba (L.) 



ORDER CONIFER®- VI X E 1 ' A MILY. 



Genus Pinus, Pine. 



613. Scrub Pine, Pinus inops (Ait.) 



614. Yellow Pine, P. mitis (Michx.) 

 Genus Juniperus, Juniper. 



615. Red Cedar, Juniperus Virginiana (L.) 



ORDER ARACEiE— ARUM FAMILY. 

 Genus Arisawia, Indian Turnip. 



616. Indian Turnip, Arisaema triphyllum (Torr.) 



617. Dragon-root, A. Dracontium (Schott.) 

 Genus Acorns, Siveet Flag. 



618. Calamus, Acorus Calamus (L.) 



ORDER LEMNACEE- DUCKWEED FAMILY. 

 Genus Lem?ia, Duckweed. 



619. Duck's meat, Lcmna polyrrhiza (L.) 



ORDER TYPACEE— CAT-TAIL FAMILY. 



Genus TypJia, . 



620. Cat-tail Flag, Typha latifolia (L.) 



ORDER ORCHIDACELE— ORCHIS FAMILY. 

 Genus Spiranthes, Ladies Tresses. 



621. , Spiranthes gracilis (Bigelow.) 



