10 



(1. Betula.) 



nigra, L. (Red Birch. River Birch.) 



Banks of streams; Red Clay Creek; Christiana. 

 Not common. April, 

 lenta, L. (Cherry Birch. Sweet Birch.) 



Rocky hills; Brandy wine; Wills' Rock, &c. Fre- 

 quent. April. 

 2. Alnus, Tourn. 



serruKita, Ait. (Alder. Candle Alder.) 

 Wet thickets. Common. March. 



Order 90.— SALICACEJE. 110. 



1. Salix, Tourn. 



tristis, Ait. (Dwarf Gray Willow.) 



Woods and hillsides; Iron Hill, &c. Not common. 

 April, 

 hiimilis, Marsh. (Low Bush Willow.) 



Low grounds; Brandy wine, Christiana, &c. April, 

 discolor, Muhl. (Glaucous Willow.) 



Low grounds; R,ed Clay Creek. Not common. April, 

 sericea, Marshall. 



Swampy thickets. Frequent. April, 

 alba, L. (White Willow.) 



About yards, &c. ; somewhat naturalized. April, 

 alba, L , var. vitellina, Carey. 



Banks of streams; Rockland. Not common. April, 

 fragilis, var. Russelliana? Carey. 



Low grounds along Brandywine, &c. Common. 

 April, 

 nigra, Marshall. (Swamp Willow. Black Willow.) 



Wet places ; Brandywine, Mill Creek, &c. Frequent. 

 May. 

 nigra, var. falcata, Carey. 



Similar situations. Not very common. May. 

 *-2. Populus, Tourn. 



tremuloides, Michx. (Aspen.) 



Damp woods; H. Grant's, &c. Not common. April, 

 grandidentata, Michx. 



Damp woods; H. Grant's, &c. Rare. April. 



