LABURNUM ADAMI (_syn Cytisus Adami_).--A graft hybrid form between the

common Laburnum and Cytisus purpureus, the result being flowers of the

Laburnum, the true Cytisus purpureus, and the graft hybrid between the

two. It was raised by Jean Louis Adam in 1825. It is a curious and

distinct tree, worthy of culture if only for the production of three

distinct kinds of flowers on the same plant.

n Cytisus alpinus_).--Scotch Laburnum. Europe, 1596. This

very closely resembles the common Laburnum, but it is of larger growth,

and flowers later in the season. The flowers, too, though in longer

racemes, are usually less plentifully produced. It grows 30 feet high.

There is a weeping form, L. alpinum pendulum, and another with fragrant

flowers, named L. alpinum fragrans, as also a third, with very long

racemes of flowers, named L. alpinum Alschingeri.

L. CARAMANICUM.--Asia Minor, 1879. A bushy shrub of vigorous habit, with

trifoliolate and petiolate leaves of a pale green colour, thick and

tough, and brightly polished on the upper surface. Flowers bright

yellow, the calyx being helmet-shaped and rusty-red. It is a beautiful

but uncommon shrub, and succeeds very well in chalky or calcareous soil.

Flowers in July.

L. VULGARE (_syn Cytisus Laburnum_).--Common Laburnum. Southern France

to Hungary, 1596. This is one of our commonest garden and park trees,

and at the same time one of the most beautiful and floriferous. The

large, pendulous racemes of bright yellow flowers are, when at their

best in May, surpassed neither in quantity nor beauty by those of any

other hardy tree. There are several varieties of this Laburnum--a few

good, but many worthless, at least from a garden point of view. L.

vulgare Parkesii is a seedling form, bearing large racemes of

deep-coloured flowers, often 14 inches long; L. vulgare Watereri was

raised in the Knap Hill Nursery, Surrey, and is one of the most distinct

and beautiful of the many forms into which the Laburnum has been

sub-divided. The flower racemes are very long and richly coloured. L.

vulgare quercifolium and L. vulgare sessilifolium are fairly well

described by their names; L. vulgare fragans differs only in having

sweetly-scented flowers; L. vulgare involutum has curiously-curled

leaves; while L. vulgare aureum, where it does well, is a beautiful and

distinct form.