71 



(2. Populus.) 



heterophylla, L. (Downy-leaved Poplar.) 



Meadow near Jackson's lime quarries. Rare, 

 graeca, Ait. (Athenian Poplar.) 



About yards, &c. Becoming rare. April, 

 dilituta, Ait. (Lombardy Poplar.) 



Yards and roadsides. Frequent. April. 

 alba, L. (Abele. Silver Poplar.) 



Recently introduced as a shade tree, and rapidly 

 increasing by suckers. April. 



Sub-Class II. Gymnosp entice. 



Order 91.— CONIFERS. 111. 



Sub-Order 1.— ABIETIXE.E. 



1. Pinus, Tourn. 



inops, Ait. (Scrub Pine.) 



Sandy woods and swamps; Ogletown, &c. Frequent. 

 May. 



2. Abies, Tourn. 



Canadensis, Michx. (Hemlock Spruce.) 



Hilly woods; Allapokas (I. S. Elliott). Very rare. 

 May. 



Sub Order 2.— CUPRESSIXE.E. 



3. Cupressus, Tourn. 



thyoides, L. (White Cedar.) 



Swamp in Appoquinimink Hundred only. May. 



4. Juxiperus, L. 



communis, L. (Juniper.) 



Dry sterile soil; Brandywine, &c. Not common. 

 May. 

 Virginiana, L. (Red Cedar.) 



Sterile hills and fencerows. Common. April. In 

 good soil attaining 50 to 60 feet in height. 



