78 
BErTULA. 
436. B. alba, Z. Common Birch. 
a. verucosa, Rev. A. Ley. 
6. glutinosa. 
PopPutLus. 
437. BP. tremula, Z. Aspen. 
438. P. nigra, L. Black Poplar. 
SaLrx, 
439. S. fragilis, Linn. Crack Willow. 
440. S. viridis, Fries. 
b. Russelliana. 
441, §. alba, Linn. Common White Willow. 
c. vitellina. 
442, S. triandra, Linn. Long-leaved Willow. 
b. Hoffmanniana, Rev. A. Ley. 
4424, 8S. purpurea, Z. (Rev. A. Ley.) 
4428. 8S. rubra, Huds. 
c. helix. Rose Willow,—Rev. A. Ley. 
443, S,. viminalis, Linn. Common Osier. 
b. intricata, Rev. A. Ley. 
444, §. cinerea, L. Grey Willow. 
b. aquatica. 
445, S. caprea, Linn. Round-leaved Willow. 
446. S. Smithiana, Willd. Silky-leaved Osier. 
'73.—Nat. order. Coniferz. 
TAXUsS. 
447. T. baccata, L. Yew-tree. 
MONOCOTYLEDONES. 
74,—Nat. order. Typhacee. 
SPARGANIUM. 
448. §S. ramosum, Huds. Branched Bur Reed. 
75,—Nat. order. Araceee. 
ARUM. 
449, A. maculatum, Z. Cuckoo Pint. Wake Robin. Lords and Ladies. 
76.—Nat. order. Lemnacesze. 
LEMNA. 
450. L. minor, Z. Lesser Duck-weed. 
