LXIX. i?ETULA'CE. : ^LNUS. 



835 



A. incana differs from the common alder, in the leaves being pointed, in the 

 leaves and the young wood not being glutinous, in their hoary appearance, 

 and in the absence of tufts of hair in the axils of the nerves of the leaves 

 It forms a very handsome tree, will grow in either dry or moist soil, and well 

 deserves a place in ornamental plantations. 



sk i. A. serrula'ta IVil/d. The saw- 

 leaved Alder. 



Identification. Willd. Sp. PI., 4. p. 336. ; Pursh 



Sept., 2. p. 623. ; Michx. N. Amer. Sji., 2. p. 113. 

 Synom/mes. iJetula serrulata Ait. Hort. Kew. 3. 



p. 338. ; B. rug6sa Ehrh. Beylr. 3. p. 21. ; ? A. 



americana iorfrf. Cat. ed. 1836 ; ? A. canadensis 



Lodd. Ca<. 1836; coramon AMer, Amer. ; Hazel- 

 leaved Alder. 

 Engravings. Wang. Amer., t. 29. f. 60. ; Michx. N. 



Amer. Syl., t. 75. f. 1. ; and our fig. 1518. from a 



living specimen. 



Spec. Char., S^c. Leaves obovate, acu- 

 minate; veins and their axils hairy on 

 the under side. Stipules elliptic, ob- 

 tuse. {Willd.) A deciduous shrub. 

 North America, in swamps and on 

 river sides. Height G ft. to 10 ft. 

 Introduced in 1769. Flowers greenish; 

 March and April. Fruit brown ; ripe 

 in October or November. 



Its leaves are of a beautiful green, 

 about 2 in. long ; oval, distinctly furrowed 

 on the surface, and doubly denticulated 

 at the edge. The wood, when cut into, 

 is white ; but like that of all the alders, 

 it becomes reddish when it comes in con- 

 tact with the air. 



1518. A. serrulita. 



^ 5. A. undula'ta Willd. 

 Alder. 



The Mvaved-leaved 



Lodd 



Identification. Willd. Sp. PI., 4. p. 336. ; Baum., p. 21. 



Cat., ed. 1836. 

 Synonymes. .Betula crispa Ait. Hort. Kew. 3. p. 339. ; B. j^'lnus 



var. crispa Mic/ix. Fl. Bor, Amer. 2. p. 181. ; A. crispa Pursh 



Fl. Amer. Sept. 2. p. 623, N. Du Bam. 2. p. 216. 

 Engraving. Our Jig. 1519. from a specimen in the British 



Museum. 



Spec. Char., ^-c. Leaves oblong, acute, rounded 

 at the base ; petioles and veins hairy on the 

 under side ; axils of the veins naked ; stipules 

 ovate-oblong. (JVilld.) A deciduous shrub. 

 Canada, and on high mountains in sphagnous 

 swamps in Pennsylvania. Height ? 10 ft. to 

 15 ft. Introduced in 1782. Flowers greenish ; 

 March and April. Fruit brown ; ripe in October .' 



1519. A. undulkta. 



" 6. A. coRDiFOLiA Lodd. The heart-leaved Alder. 



Identification. Lodd. Bot. Cab., t. 1231. 



Synonyme. A. cordSta Tenore Prod. 54., Hayne Dend. p. 153. 



Engravings. Bot. Cab., t. 1231. ; the plate of this species in Arb. Brit., 1st edit. vol. vii. ; and o 

 fig. 1520. 



Spec. Char., ^c. Leaves heart-shaped, acuminate, dark green and shining 

 (Tenore.) A tree of similar magnitude to the common alder. Calafjria 

 and Naples, in woods. Height 15 ft. to 20 ft. Introduced in 1820. 

 Flowers greenish brown ; March and April, before the developement of the 

 leaves. Fruit brown ; ripe in October. 



3h 2 



