CASTANEACE^. 



225 



II. HAZEL SEEIES. 



In most of the Hazels or lN"ut-treesi (fig. 168-174), the flowers, 

 amentaceous and monoecious, are apetalous and regular. The 



Corylus Avellana. 



\ 



Fig. 171. Female 

 flower. 



Fig. 168. Male and fe- 

 male inflorescences. 



Fh 



1 69. Two-flowered 

 female scale. 



Fig. 170. Female flower 



surrounded by yoimg 



involucre. 



male catkins, similar to those of the Birches^ bear numerous alter- 

 nate scales, and within these are nearly always found two lateral 

 scales supported with them.^ Near the point of union of these 

 various appendages stamens are inserted, most frequently to the 

 number of eight,^ formed each of a filament and a unilocular,* extrorse^ 



3, 230.— Tausch, i^/om (1834), 520.— P(epp. 

 et Endl. Nov. Gen. et Spec. t. 198, fig. C. — 

 MiQ, Ann. Mus. Lugd.-Bat. ii. 137.— A. Gray, 

 Man. ed. 5, 460-— Bertol. FL Ital. x. 163.— 

 Ledeb. FL Ross. iii. 657. — Rupr. Bull. Acad. 

 Petersb. (1857), 558.— Gren. et Godr. FL de Ft: 

 iii. 148. 



1 Corj/Ius T. Inst. 581, t. 347.— L. Geft. n. 

 730. — Adans. Fam. des. PL ii. 375. — J. Gen. 

 410.— Lamk. Diet. iv. 495 ; Suppl. iv. 101 ; IlL 

 t. 780.— GiERTN. Fruct. ii. 52, t. 89.— Schkuhr, 

 JIamlb. t. 305.— TuRp. Diet. Sc.Nat. Atl. t. 302, 

 303.— Nees, Gen. ii. 22.— Spach, Suit, a Biiffon, 

 xi. 205. — ExDL. Gen. n. 1844. — Schacht, Lehrb. 

 441, t. 9 ; Der Baum, t. 4. — Payer, Fam. Nat. 

 163.— A. DC. Prodr. xvi. sect. ii. 129.— H. Bx. 



Inpt. Bend. Acad. Sc. Ixxvii. 61 ; Compt. Bend. 

 s.Fran^.i. (1872), 496, t. 9; Adansonia,zLi.t.G. 

 VOL. VI. 



2 They are notably wanting in Ostryopsis 

 They have been considered as lateral stipules 

 of the principal bracts ; with others they take 

 the place of leaves (Dcell, Bhein. FL 273 ; Zur 

 ErJcl. Laubkn. Ament. 19, fig. 6). 



3 There are rarely more, often less, especially 

 in the flowers near the top of the catkin. 

 These may even be only 2-androus. De- 

 CAisxE inadvertently describes Ostryopsis as 

 4-androus ; they often have as many stamens as 

 other species of Corylus. 



4 " Rather (theoretically) 4 stamens, the .an- 

 thers and filaments being sometimes divided." 



5 They are extrorse, not with respect to the 

 axis of the infloroscence (for relatively to that 

 the lower and interior are introrse), but with 

 respect to the centre of the flower. 



15 



