270 
AMENTACE.S:. 
5. Alnus. Scales of the barren catkins 3-lobed, 3-flowered. 
Perianth 4 -parted. Scales of the fertile catkin ovate, 2- 
flowered, coriaceous, persistent. Styles 2. Ovary com- 
pressed. Fr. not winged, 2-celled. 
Tr. IV. CUPULIFERsE. Male fl. in a catkin. Fern, solitary 
or aggregated or spiked. Perigone adnate to the ovarium, 
with a denticulated limb, sometimes evanescent, surrounded 
by a coriaceous involucre. 
6. Fagus. Barren fl. in a globose catkin. Perianth 5- or 6- 
fid. Stam. 10 — 15. Fertile fl. 2 together within a 4-lobed 
prickly involucre. Stigmas 3. Ovaries 3-cornered and 3- 
celled. Nut by abortion 1— 2-seeded. 
7. Castanea. Barren fl. in a long cylindrical catkin. Pe- 
rianth 6-parted. Stam. 10 — 20. Fertile fl. 3 within a 4- 
lobed muricated involucre. Stigmas 6. Ovary 5 — 8-celled. 
Nut 1 -celled with 1 — 3 seeds. 
8. Quercus. Barren catkin long, pendulous, lax. Stam. 
5 — 10. Perianths — 7-cleft. Fertile fl. solitary with a cup- 
shaped scaly involucre. Stigmas 3. Ovary 3-celled. Nut 
1 -celled, 1 -seeded, surrounded at the base by the enlarged 
cupshaped involucre. 
9. Corylus. Barren catkin long, pendulous, cylirdrical. 
Scales 3-lobed, middle lobe covering the 2 lateral lobes. 
Stam. 8. Anth. 1-celled. Perianth 0. Fertile fl. several, 
surrounded by a scaly involucre. Styles 2. Nut 1-seeded, 
inclosed in the enlarged coriaceous laciniated involucre. 
10. Carpinus. Barren catkin long, cylindrical. Scales round- 
ish. Stam. 8 — 14. Fertile fl. in a lax catkin. Scales large, 
leafy, 3-lobed, 2-flowered. Styles 2. Nut ovate, 1-seeded. 
Tribe I. Salicinece. 
1. Salix Linn. 1 
I. Pedunculate laterales. 
Catkins on a leafy stalk, lateral, coetaneous. 
* Scales of the catkins deciduous. 
i. Pentandrce (Borr.). Stam. more than 3. L. glossy, glabrous. 
Trees. 
1. S. pentandra (L.) ; 1. ovate-elliptical or ovate-lanceolate 
1 I have ventured to place some plants as subordinate species ■which 
are considered as distinct by my able friend Mr. Borrer, but I do so 
with much hesitation, being very imperfectly acquainted with many of 
them. 
