82 



XIX. ACERACEjE. 



[A' 



cer. 



** Petals equal-sided. Stamens in each set united to above the middl 



with a scale between the sets. Styles 3. Elodea. * 



12. H. eludes L. (Marsh St. J.) ; sepals with (reddish) o-laj^, 

 dular serratures glabrous, leaves roundish shaggy, stem terete 

 creeping, panicle of few flowers. E. B. t. 109. 



. Spongy bogs, not unfrequent. 

 Stem 6— 



Rare in Scotland. 



Flowers few, panicled, terminal, pale yellow 

 Petals persistent, with a fringed appendage at the base. 



8 inches long. 



triadelphous. 0\mry and fruit 1 -celled. 



Stamens 15 



Ord. XIX. ACERACEiE Juss. 



Calyx 4 — 5— 9-partite, imbricated in asstivation. Petals of 

 the same number, with scarcely any claw, inserted into the 

 margin of an hypogynous disk, or wanting. Stamens about 8 

 inserted on the disk. Ovar?j 2-h)bed, 2-celled. Style ][ 



Fruit a double Sarnai^a, each 1 -celled with 1 or 2 



Stigmas 2. 

 erect seeds. 



Albumen 0. Embryo curved, with foliaceous 



wrinkled cotyled,ons^ and an inferior radiele.-^Trees, of the tem^ 

 peltate parts of the northern hemis2)here. Leaves generally simple 

 and lobed; flowers often polygamous. — Acer saccharinum of N, 

 America yields Maple Sugar. 



1. A''cER Linn. Maple. 



Flowers polygamous. Cal lobed or partite. Cor. of several 

 petals. Named from acer^ sharp or hard (ac^ Celtic), on ac- 

 count of the hardness of the wood, which was employed in 

 fabricating spears, spikes, &c. 



1. A "^ Pseud0'pldta7ins L. {greater M. or Sycamore) ; leaves 

 5-lobed unequally serrate, racemes pendulous, wings of fruit 

 slightly diverging. E, B. t. 303. 



In hedges, plantations, and about houses. T^ . 5,6. — A large te, 



with spreading branches and ample leaves. Flowers greenish. Fruit 



glabrous, furnished with two long membranaceous wings, which greatly 



aid in its dispersion. The wood is used for bowls and trenchers and 

 other turnery. 



2. A. campestre L. (common M.) ; lobes of the leaves mostly 

 5 inciso-crenate, racemes somewhat corymbose upright subto- 

 mentose, wings of fruit diverging horizontally. E. B. t. 304. 



Woods and thickets, not common in Scotland, and perhaps neither 



-A small tree, with rough 

 Wood often beautifully 



indigenous there nor in Ireland. \, 5,6.- 



Leaves small. 



bark, full of deep fissures, 

 veined, and then much prized. 



Ord. XX. GEKANIACE^ Juss. 



Petals 5, 



Sepals 5, persistent, with an imbricative sestivation. 

 with a claw. Stamens generally monadelphous and twice as 





«. 



3, 



t 



