^rAST-BEARI^-(; famit.v 



445 



whilst m man)- countries acorns and beech-mast are of great value 

 as- food for pigs. 



Ti-ibe I. Betulk.e. — All flowers in catkins ; ovary of 2 i-ovuled 

 chambers ; fruit small, compressed. 



'• BktuL-V, — Stamens 2 : Si-ales of fruit-bearing iatl;iu ihin, 

 deciduous. 



-■ Alnvs. — Stamens \ ; seales of fruit-bearing catkin woodv, 

 persistent. 



Tribe 2. CoRVLf.t. — Staminate flowers in catkins; antlters tufted 

 with hairs ; earfwHate flowers in pairs in axils of leafy bracts ; ejvarv 

 ;-chambered ; t)6i!//fi- 2. 



BETLLA I'K.VD 



3. Carpixu.^. — Fruiting spiize with numerous leafy scales. 



4. Ci.'iRVLUS. — Fruiting spiize with a few brown scales. 



Tribe 3. QuERCiNE.t. — Staminate floicers in catkins; earpellate 

 flowers I — 3 together in an involucre of numerous bracts, which 



-6-chambered -; ovuies 



in each 



eixlarges in fruit : ovary 

 chamber. 



5. QuKRCUS. — Staminate flowers in a slender interrupted catkin ; 

 stigmas 3. 



*6. Cf^STA'!sV.\.—-Staminale flo'eers in a long slender catkin ; 

 stigmas 6. 



7. Fagus. — Staminate floieers in a globose catkin : stigmas 3. 



I. Retul.i. (Birch). — Trees and shrubs ■. Jowers all in catkins 

 with 3-lobed, deciduous scales ; stamens 2, \sith forked filaments ; 



