77. AJIENTIF£K^. 
297 
2. PopuLVS. Catkins with slashed scales. Stam. 4 — 30, 
from a little oblique cupshaped perianth. Fr. almost 2-celled, 
with a cupshaped penanth. 
Tr. n. MYRICE^. Fl. all in catkins. Fr. drupaceous, sui'- 
rounded by the scales of the ovary become iieshy and ad- 
herent. 
3. Myeica. Catkins with concave scales. Stani. 4 — 8. 
Stigmas subulate. Drupe 1-celled, 1-seeded. Perianth 0. 
Tr. in. BETULINEJE. Fl. all in catkins. Ovary 2-celled, 
each with 1 ovide. Fr. naked, iudehiscent, 1-celled, 1-seeded. 
Seeds pendulous, not haiiy. 
■4. Betula. Scales of the baiTen catkins ternate, the middle 
one bearing the stamens. Perianth 0. Scales of the fertile 
catkin 3-loDed, 3-flowered, membranous, deciduous. Stjdes 
2, filiform. Fr. with a membranous margin. 
5. Alnus. Scales of the ban-en catkins 3-lobed, 3-flowered. 
Perianth 4-parted. Scales of the fertile catkin ovate, 2- 
flowered, coriaceous, persistent. Styles 2. Ovary com- 
pressed, 4 minute scales at its base. Fr. not winged. 
Tr. rV. CUPTILIFEBM. Male fl. in a catkin. Fem. solitary 
or clustered or spiked. Perianth adnata to the ovary (glans), 
with a denticulate limb, sometimes evanescent, surrounded 
by a coriaceous involucre. 
6. Fagus. BaiTcn fl. in a globose catkin. Perianth 5- or 6- 
fid. Stara. 8—15. Fertile fl. 2 together within a 4-lobed 
prickly involucre. Stigmas 3. Ovaries 3-'33rnered and 3- 
celled. Nut by abortion 1 — 2-seeded. 
7. CastajNT-a. Ban-en fl. in a long cylindrical catkin. Pe- 
rianth G-parted. Stam. 8—20. Fertile fl. 3 within a 4- 
lobed muricate involucre. Stigmas 6. Ovai-y 5— 8-ceUed. 
Nut 1-celled with 1 — 3 seeds. 
8. QuERCus. Barren catkin long, pendulou.s, lax. Stam. 
5 — 10. Perianth 5 — 7-cleft. Fertile fl. solitary with a cup- 
shaped scaly involucre. Stigmas 3. Ovaiy 3-ceIled. Nut 
1-celled, 1-seeded, surroimded at the base by the enlarged 
cupshaped involucre. 
9. CoRYLUS. Ban-en catkin long, pendulous, cylindrical. 
Scales 3-lobed, middle lobe covering the 2 lateral lobes. 
Stam. 8. Anih. \-celhd. Perianth 0. Fertile fl. several, 
surrounded by a scaly involucre. Styles 2. Nut 1-seeded, 
inclosed in the enlarged coriaceous cut involucre. 
10. Carpinus. BaiTen catkin long, cylindrical. Scales round- 
0 5 
