164 HARDY ORNAMENTAL 



Robinia (Leguminosae), See Halimodendron. 



ROBINIA DUBIA (syns E. echinata and E. ambigua). A 

 very pretty garden hybrid form, said to have for its 

 parentage R. Pseud-Acacia and R. viscosa. It is of quite 

 tree-like growth and habit, with unusually short spines, 

 and pea-green foliage. The flowers are produced pretty 

 freely, and are of a pale-rose colour, and well set off by 

 the light-green leaves, over which they hang in neat and 

 compact spikes. 



R. HISPIDA (syn E. rosea). Rose Acacia. North America, 

 1743. Amongst large-growing shrubs this is certainly one 

 of the most distinct and handsome, and at the same time 

 one of the hardiest and readiest of culture. Under favour- 

 able conditions it grows about 16 feet high, with large oval 

 or oblong leaflets, and having the young branches densely 

 clothed with bristles. The flowers, which are individually 

 larger than those of the False Acacia, are of a beautiful 

 rosy-pink, and produced in June and July. It is a very 

 ornamental, small-growing species, and one that is pecu- 

 liarly suitable for planting where space is limited. R. 

 hispida macrophylla (Large-leaved Rose Acacia) is ren- 

 dered distinct by its generally more robust growth, and 

 by its larger foliage and flowers. The species, however, 

 varies a good deal in respect of the size of leaves and 

 flowers. 



R. NEO-MEXICANA. New Mexico, 1891. This is a 

 desirable species, with glaucous foliage and dense, clus- 

 tered racemes of pale rose-coloured flowers. 



R. PSEUD-ACACIA. Common Locust, Bastard Acacia, 

 or False Acacia. North America, 1640. A noble-growing 

 and handsome tree, with smooth shoots, and stipules that 

 become transformed into sharp, stiff spines. The flowers 

 are in long racemes, pure white or slightly tinged with 

 pink, and with a faint pleasing odour. This species has 



