1892 



ARBORETUM AND FRUTICETUM. 



PART HI. 



plants of the Black Jack in the Horticultural Society's Garden, and a tree 

 in the arlioretum of the Messrs. Loddiges, under the name of Q. aquatica. 



¥ 22. Q. aqua'tica Soland. The Water Oak. 



Identification. Soland. in Ait. Hort. Kew., ed. 1., 3. p. ;>f>7., cd. 2., No. 11. ; Willd. Sp. PI., 4. p. 441.; 

 . Pursh Fl. Amer. Sept., 2. p. 628. ; Michx. Quer., No. 11. ; N. Du Ham., 7. p. 167. ; Smith in 



Rett's (."yd-. No- 58. 

 %NMMMt Q. fiMiis cuneiformibus, &c, Gron. Virg. ; Q. folio non serr&to, &.C., Cat. Carol., l.t. 20. ; 



«. nigra Willd. Sp. PI., MIS. ; Q. uliginosa Wangh. Amer., t. 6. f. 18. 

 Fn^rarings. Michx. <Juer., t. ID, 20, and 21. ; Cat. Carol., t. 20. ; and our fig. 1767. 



Spec. Char., <§c. Leaves wedge-shaped, smooth ; tapering at the base ; dilated 

 and obscurely 3-lobed at the end ; the middle lobe largest. Calyx nearly 

 hemispherical. Nut roundish. (Willd.) A tree, from 40 ft. to 60ft. high. 

 Introduced before 1723. 



Varieties. 



2 Q. a. 2 nana ; Q. aquatica Smith and Abb. Ins., ii. p. 117. t. 59. ; Q. a. 

 elongata Ait. Hort. Kew., v. p. 290.; Q. dentata Bart. Trav., p. 14. 

 and 28. ; Q. nana Willd. Sp. PL, iv. p. 443., Pursh Fl. Amer. Sept., ii. 



&628.,N. Du. Ham., vii. p. 169., Smith in Rces's Cycl, No. 55.; the 

 vvarf jagged Oak ; is of much lower stature than the species, and 

 has the leaves nearly sessile, and more distinctly lobed. 

 5 Q. a. 3 maritima Michx. Quer., No. 

 1 1. t. 20. f. 2.; Q.hemispha/rica 

 Willd, Sp. PL, iv. p. 443., Bart. 

 Trav., p. 320., Pursh Fl. Amer. 

 Sept., ii. p. 628., N. Du Ham., 

 vii. p. 169., Smith in Rees' 's Cycl., 

 No. 65. ; has persistent leaves. 



Other Varieties. There is no Ame- 

 rican oak, not even Q. falcata, of which 

 the foliage is so variable as of this tree. 

 On full-grown trees, the leaves are 

 smooth, shining, and heart-shaped ; or 

 broad and rounded at the summit, and 

 terminating in a point at the base, as 

 in fig. 1767.; and on young trees, or 

 on snoots from the root of old trees, 

 the leaves are oval, toothed, oblong, 

 and, in short, of all the different forms 

 shown in fig. 1768., taken from the Histoire des Chenes. In the Hortus 

 Kcwensis, five varieties are enumerated, only differing in the shape of the 

 leaves ; but the elder Michaux as- 

 serts that they cannot be propagated 

 with certainty even by grafting ; and 

 that all the different kinds may be 

 found on one tree. Even the two 

 we have given under distinct names, 

 though they are made species by some 

 authors, are rather variations than 

 varieties. 



Drscription, fyc. The water oak 

 rarely exceeds 40 ft. or 45 ft. in height, 

 with ■ trunk from 1 ft. to I ft. 6 in. in 

 diameter ; though it is sometimes found 

 56 ft. or 60 ft. high. The bark, on the 

 oldest trees, is smooth, or very slightly 

 furrowed. The acorns, which are of ;i 

 'lark brown, and fire small and ex- 

 tremely bitter, art contained in shallow 



slightly scaly cups. They are not 



