What is "corylus americana"

Hazel \Ha"zel\ (h[=a]"z'l), n. [OE. hasel, AS. h[ae]sel; akin to D. hazelaar, G. hazel, OHG. hasal, hasala, Icel. hasl, Dan & Sw. hassel, L. corylus, for cosylus.]

1. (Bot.) A shrub or small tree of the genus Corylus, as the Corylus avellana, bearing a nut containing a kernel of a mild, farinaceous taste; the filbert. The American species are Corylus Americana, which produces the common hazelnut, and Corylus rostrata. See Filbert.
   --Gray.

2. A miner's name for freestone.
   --Raymond.

   Hazel earth, soil suitable for the hazel; a fertile loam.

   Hazel grouse (Zo["o]l.), a European grouse ( Bonasa betulina), allied to the American ruffed grouse.

   Hazel hoe, a kind of grub hoe.

   Witch hazel. See Witch-hazel, and Hamamelis.

filbert \fil"bert\, n. [Perh. fr. fill + bread, as filling the bread or husk; cf. G. bartnuss (lit., bread nut) filbert; or perh. named from a St.Philibert, whose day, Aug. 22, fell in the nutting season.]

1. (Bot.) The fruit of the Corylus Avellana or Corylus maxima, also called the hazel; the hazelnut. It is an oval nut, containing a kernel that has a mild, farinaceous, oily taste, agreeable to the palate.

   Note: In England filberts are usually large hazelnuts, especially the nuts from selected and cultivated trees. The American hazelnuts are of two other species, Corylus Americana and Corylus cornuta, and are also sometimes called filberts.

2. (Bot.) The tree bearing the filbert; the hazelnut tree.

   Filbert gall (Zo["o]l.), a gall resembling a filbert in form, growing in clusters on grapevines. It is produced by the larva of a gallfly ( Cecidomyia).

Corylus americana, the American Hazelnut, is a species of deciduous plant that grows in the form a shrub; it is native to eastern North America, in eastern Canada and the Eastern United States; it has been classed within the genus Corylus.