118 Leguniinose— Laburnum. 
the leaves have rather shorter petioles; but the most remark- 
able thing in it is the complete reversion of some parts of the 
same tree to one or the other of the parents. Thus the three 
forms may be seen growing on one stem, having the appear- 
ance of being grafted upon it. The hybrid is sterile, but the 
parent reversions fertile. 
Fiz. 67. Laburnum vulgare. (} vat. size.) 
2. L. alpinwm. Scotch Laburnum.—Very similar to the 
preceding, and some of the varieties in cultivation appear 
to partake of the characteristics of both. This differs from 
No. 1 in the pod being quite glabrous, distinctly stalked, and 
winged along the upper suture. It is also of larger growth, 
quickly forming a tree from 20 to 30 feet high. A native of 
South-eastern Europe. ZL. péndulwm and confértwm are 
varieties. 
3. L. ramentaceum, syn. L. Weldéni.—The racemes in this 
species or variety are sub-creet, and it is of dwarf shrubby 
habit, with very hairy leaves. A native of Dalmatia. A variety 
called serotinwm, Autumn-flowering Laburnum, is referred to 
this species. 
7. GENISTA. 
Dwarf prickly or unarmed shrubs with 1-foliolate leaves or 
