.( 338 .) 
CO'RYLUS* *. 
Linncan Class and Order. MoNCE'ciAf, Polya'ndria. 
Natural Order. Cupuli'fer.e, Richard. — Lip.dl. Syn. p. 239; 
introd. to Nat. Syst. of Bot. p. 97. — Rich, by Macgilliv. p. 545. — 
Amf.nta'ce.e, Linn. — Juss. Gen. PI. p. 407. — Sm. Gram, of Bot. 
p. 189. — Loud. Hort. Brit, p.534. — Mack. FI. Hibern. p.242. — 
Hook. Brit. FI. (4th ed.) p. 419 . — Querneales ; sect. Quercin/E ; 
type, Corylace.e ; Burn. Outl. of Bot. v. ii. pp. 523 & 531. 
Gen. Ciiar. Sterile Flowers in cylindrical imbricated catkins 
(fig. 1). Scales sessile, imbricated, much contracted at the base, 
in 3 deep, egg-shaped, concave segments, the middle one the 
largest, lying over the two lateral ones (see fig. 2). Corolla none. 
Filaments ( see fig. 2.) 8, or more, hanging from the inner side of 
each scale, hair-like, rather short. Anthers roundish, of 1 cell, 
bearded at the tip. Fertile Flowers in a bud-like catkin, which is 
developed into a branchlet ; bearing the flowers at its tip (see fig. 3). 
Outer Calyx (see fig. 4.) inferior, of 1 sepal, deeply divided, many- 
flowered, subsequently much enlarged, permanent; inner not ob- 
vious, formed of a slightly villous membrane, that covers the germen, 
to the tip, and, as that progresses to a nut, adheres to it most closely 
and becomes part of the shell. Corolla none. Germen (see fig. 5.) 
very small, egg-shaped, with rudiments of 2 seeds. Styles (see 
fig. 5.) 2, very short. Stigmas (see fig. 5.) prominent, awl-shaped, 
coloured, finely downy, deciduous. Nut (see fig. C.) egg-shaped, 
with a broad scar, bony, not bursting, a little compressed and downy 
at the top, scarcely pointed, invested with the greatly enlarged, tu- 
bular, coriaceous, jagged, downy outer-calyx or involucrum ; by 
abortion, 1-seeded. Seed (see fig. 6, b.) adhering to the remains of 
the dissepiment. Cotyledons large, without separate albumen ; 
embryo oblong, at the top of the seed. 
The sterile flowers in a cylindrical catkin, each of a 3-lobcd 
scale, with 8 or more stamens, destitute of a corolla ; the fertile 
flowers in a bud-like catkin, each flower with 2 stigmas ; and the 
nut inclosed in the lacerated outer calyx or involucrum ; will dis- 
tinguish this from other genera in the same class and order. 
One species British. 
CO'RYLUS AVELLA'NAJ. Common Hazel-nut. Stock-nut. 
Spec. Char. Stipulas oblong, blunt. Leaves roundish, heart- 
shaped, pointed. Young branches hairy. Calyx bell-shaped, 
shorter than the nut. 
Fig. 1. Catkin of Sterile Flowers. — -Fig. 2. A separate Sterile Flower. — Fig. 3. 
Bud-like Catkin of Fertile Flowers. — Fig. 4. The same with the outer scales taken 
off. — Fig. 5. Germen and Pistils of a Fertile Flower. — Fig. 6. The Fruit ; a. the 
shell ; b. the kernel or seed ; c. the umbilical cord. 
* From korus, Gr. a casque or cap ; the fruit, with its involucrum, appearing 
as if covered with a bonnet. + See folio 93, note +. 
t From Avellino, a city of Naples, in the neighbourhood of which nuts (the round 
Spanish), arc cultivated in great abundance. 
