TENNESSEE FLORA. 81 



€ai'pinus Americana Michx. From highest mountain sum- 

 mits to the lowlands. April. 



Ostrya Virginica Willd. Limestone glades. April. 



Corylus Americana Walt. Rich soils. O. S. April. 



C. rostrata Ait. Common in the mountains of East Tenn. 

 April. 



BETULACE.E. 



Betula lenta L. Lookout Mt., Alleghanies. 



B. lutea IsUchx., h\. Summit of Smoky Mts. July. 



B. nigra L. O. S. Abundant in West Tenn. April. 



B. papyracea Ait. O. S. Principally mountains of East 

 Tenn. May. 



Alnus viridis DC. Mountains of East Teuu. 



A. serrulata Ait. O. S. March. 



SALICACEiE. 



Salix nigra Marsh. River banks. The form S. nigra, var. 

 Wardi Bebb., in island of Cumberland at Nashville. April- 

 May. 



S. alba L. O. S. April. 



8. humilis Marsh. In the barrens and high mountains. May. 



S. hngifolia Miihlb. West Tenn. 



S. tristis Ait. Barrens of Middle Tenn. March. 



S. lucida Miihlb. Mountains of East Tenn. 



S. petiolaris Smith. Buena Vista ferry road, Nashville. 

 April. 



S. purpurea L. Introduced and cultivated for basket work. 



S. Babylonica L. Introduced. 



Populiis mouilifera Ait. O. S. March. 



P. heteropliylla L. O. S. March-April. 



P. balsamifera L., var. candicans Gray. Introduced by early 

 settlers in East Tenn. (Balm of Gilead.) 



P. alba L. Introduced and spreading. March. 



P. dilatata Ait. Introduced. Short-lived in Middle Tenn. 

 6 



