296 "Jl . AMENTIFER^. 



of this variety.— a. Throughout England. ^. South of England 

 and Ireland. T. III.— V. Common Elm. E. I. 



2. U. montana (With.) ; 1. much acuminate douhly serrate 

 scabrous above rather downy beneath, ped. short, fl. 5 — 7-fid, 

 lobes ciUate, fr. oblong or roundish notched, seed-cavity chiefly 

 below the middle offr. and distant from the notch. — E. B. 1887. 

 U. major Sm., E. B. 2542 ?.— Branches large, spreading. L. 

 broad. Fr. hoplike.— Woods and hedges. T. III. IV. WychElm. 



Order LXXVII. AMENTIFERiE. 



Fl. monoecious or dioecious, rarely perfect. Barren fl. capitate 

 or in catkins ; sometimes with a membranous perianth. Fertile 

 fl. clustered, solitary or in catkins. Ovary usually simple. Stigmas 

 1 or more. Fruit as many as the ovaries, bony or membranous. 

 Albumen usually wanting. Embryo straight or curved, plain. 

 Radicle mostly superior. — Young leaves with stipules,— For 

 figures of the genera see G. F. G. Monochl. 



Tribe I. SALICINE^. Fl. all in catkins. Fr. naked, 2-valved, 

 1-celled, many-seeded. Seeds erect, comose. 



1. Salix. Catkins consisting of imbricate entire scales. 

 Stam. 1—6. Fr. a 1-celled follicle with 1 — 2 glands at its 

 base. Perianth 0. 



2. PopuLUS. Catkins with lacerate scales. Stam. 4 — 30, 

 from a little oblique cupshaped perianth. Fr. almost 2-celled, 

 with a cupshaped perigone. 



Tr. II. MYRICEM. 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. 

 Stigmas subulate. Drupe 1-celled, 1-seeded. Perianth 0. 



Tr. III. BETULWEJE. Fl. all in catkins. Ovary 2-celled, 

 each with 1 ovule. Fr. naked, indehiscent, I-celled, 1-seeded. 

 Seeds pendulous, not comose. 



4. Betula. Scales of the barren catkins ternate, the middle 

 one bearing the stamens. Perianth 0. Scales of the fertile 

 catkin 3-lobed, 3-flowered, membranous, deciduous. Styles 

 2, filiform. Fr. with a membranous margin. 



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, 4 minute scales at its base. Fr. not winged. 



