286 
/i). AMENTACE^E. 
tlie base finely and regnlarly crenate acuminate rather than cus- 
])idate.” Lindl. — Devon and Cornwall. T. Cornish Elm. E. 
7. V. montana ( Sm.) ; “1. obovate cuspidate doubly and coarsely 
serrate cuneate and nearly equal at the base always exceedingly 
scabrous above evenly downy beneath, branches not corky cine- 
reous smooth, fr. rhomboid-oblong scarcely cloven naked.” hindl. 
— E. J3. 1887. — Height 50 — 60 feet. Sj>reading. L. very large. 
— Woods and hedges. T. III. IV. Wych Elm. 
[Probably all our Elms belong to only 2 species — U. cam- 
pestris which ])roduces scions ; and U. montana which does not. 
Nos. 1, 2, 3, and 6 belong in that case to the former, and 3 and 
7 to the latter.] 
Order LXXV. AMENTACEiE. 
n. monoecious or dioecious, rarely perfect. Barren fl. capitate 
or in catkins ; sometimes with a membranous perianth. Fertile 
ri. clustered, solitary or in catkins. Ovary usually simple. Stigmas 
1 or more. Fruit as many as the ovaries, bony or membranaceous. 
Albumen usually wanting. Embryo straight or curved, plain. 
Radicle mostly sujierior. — Young leaves with stipides. 
Tribe I. SALICINEyE. El. all in catkins. Fr. naked, 2-valved, 
1-celled, many-seeded. Seeds erect, comose. 
1. Salix. Catkins consisting of imbricated scales. Stam. 
1 — 5. Fr. a 1-celled folhcle with 1 — 2 glands at its base. 
Perianth 0. — G. F. G. Monochl. 15. 
2. PopuLUS. Catkins with lacerated scales. Stam. 8 — 30, 
from a little oblique cupshaped perianth. Fr. almost 2-celled, 
with a cupshaped perigone. — G. F. G. Monochl. 16. 
Tr. II. MYRICEyE. Fl. all in catkins. Fr. drupaceous, sur- 
rounded by the scales of the ovary become fleshy and ad- 
herent. 
3. Myrica. Catkins with concave scales. Stam. 4 — 8. Drupe 
1-celled, 1-seeded. Perianth 0. — G. F. G. Monochl. 26. 
Tr. III. BETULINE^. Fl. all in catkins. Fr. naked, inde- 
hiscent, membranous, 2-celled with sohtary ovules. Seeds 
pendulous, not comose. 
4. Betula. Scales of the barren catkins temate, the middle 
one bearing the stamens. Perianth 0. Seales of the fertile 
catkin 3-lobed, 3- flowered, membranous, deciduous. Styles 
2. Ovary compressed. Fr. with a membranous margin, 
1-seeded. — G. F. G. Monochl. 18. 
5. Alnus. Scales of the barren catkins 3-lobed, 3-flowered. 
