464 PHANEROGAMOUS PLANTS. 



and are always perfectly entire. The yellow color of the under side 

 of the leaves sometimes disappears wholly or in part. The male 

 catkins are shorter and more rigid than in the common chestnut ; 

 the burr is scarcely one-third as large, with shorter prickles. The 

 nut (which seems to be always solitary) resembles that of the Chin- 

 quapin (G. pumila), but the shell is almost as thick as in the European 

 filbert. This species much more resembles some of the Asiatic 

 chestnuts, especially G. Javanica, than those of the Eastern States. 



[In the present case the received generic name has been substituted 

 in the MSS.] 



3. CORYLUS, Tourn. 



1. CORYLUS ROSTRATA, Ait. 



Corylus rostrata, Ait. Hort. Kew. ed. 1, 3, p. 364 ; Loud. Enc. of Trees, p. 925 

 f. 1727. 



Hab. Between Spokane River and Fort Colville, on the Upper 

 Columbia; also at Puget Sound, and southward to San Francisco.— 

 We have specimens of a Corylus from Dr. Scouler, collected on the 

 Columbia River, which we doubt not is G. Americana, var. Hook. PI, 

 Bor. Amer. 2, p. 160. Hooker states that he had seen no fruit of his 

 variety ; but the specimens of the Exploring Expedition have mature 

 fruit, which wholly resemble that of the eastern G rostrata. 



