610 ARBORETUM AND FRUTICETUM. PART III. 



Y R. P, I ctispa Dec. Prod., ii. p. 261. — Prickles wanting. Leaflets all, 



or for the most part, undulately curled. 



Y R. /'. 5 umbrae ulifcra Dec. Prod.* ii. p. 261., Cat. Hort. Monsp., 157.; 



R. inermis Dum. Cours., vi. p. 14-0. — Prickles wanting. Branches 

 much crowded, and smooth. Head orbicular. Leaflets ovate. This 

 variety is said to have been raised from the seed of R. Pseud-Acacia; 

 and, according to Dumont de Courset, to have yellow flowers. It 

 has been common in British gardens since 1820, but has not yet 

 flowered in this country. 

 * R. P. 6 tortudsa Dec. Prod., ii. p. 261. ; and the plate in Vol. II.— 

 Branches much crowded, and twisted. Racemes similar to those of 

 R. Pseud- Jcacia, but smaller and fewer-flowered. 

 *i R. P. 1 sophorse/o&z Lodd. Cat., 1830, has the leaves large, and some- 

 what like those of Sophora japonica. 

 ¥ R. P. 8 amorphcefolia Lk. has leaves somewhat like those of Amorpha 



fruticosa. 

 ¥ R. P. 9 .striata Lk. has the general tendency of the shoots upright ; 



but still the plant is not so tastigiate as the Lombardy poplar. 

 ¥ R. P. ]0proccra Lodd. Cat., 1830. — A tall vigorous-growing variety, 

 i R. P. 1 1 pendula Ort. Dec, p. 26. — The shoots are somewhat droop- 

 ing, but not very decidedly so. 

 2 R. P. 12 monstrosa Lodd. Cat., 1830. — The leaves are large, and twisted. 

 *t R. P. 13 macrophylla Lodd. Cat., 1830, has the leaves long, and the 



leaflets broad. 

 *£ R. P. 14 microphylla Lodd. Cat., 1830; R. angustifdlia Hort.; has the 



leaves small, and the leaflets narrow. 

 If R. P. 15 spectdbilis Dum. has large leaves and is without prickles : it 

 produces straight vigorous shoots, which are angular when young. 

 It was raised from seed by M. Descemet, at St. Denis, and was 

 formerly known in the French nurseries by the name of agacante 

 (enticing). 

 *t R. P. 16 latkiliqua, the broad-podded locust, is mentioned in Prince's 



Catalogue for 1829. 

 In America, there are three popular varieties, distinguished by the colour 

 of the heart- wood ; viz. the red locust, when the heart-wood is red, and 

 which is esteemed by far the most durable and beautiful timber; the green 

 locust, which is the most common, which has a greenish yellow heart, and 

 is held next in esteem to the red; and the white locust, which has a 

 white heart, and is considered the least valuable of all ; and, in the western 

 states, there is said to be another variety, called the black locust. All 

 these may more properly be considered as variations, apparently depending 

 solely on the soil and situation, in the same manner as the blue colour of 

 the flowers of the hydrangea depends on the soil in which it is planted. 



Most of these varieties are tolerably distinct in the foliage when the plants 

 are young ; but those best worth cultivating, except where there is a com- 

 plete collection, are R. P. umbraculifera, the parasol acacia; R. P. pendula, 

 the weeping variety ; R. P. stricta, the upright-growing sort; and R. P. 

 spectabilis, the vigorous-growing thornless variety. With regard to the 

 yellow-flowered variety, it may be worth continuing by grafting or suckers; 

 but, to make quite sure of having white flowers, the trees producing them 

 OOght to be propagated by grafting also; as plants raised from seed, though, 

 for the most part, they have white flowers, yet occasionally produce yel- 

 lowish ones. 



Den ription. The Robfroa Pseud-Acacia, though it attains the height of 70 ft. 

 or 80 ft., with a trunk of 2 ft. or 3 ft. in diameter, in favourable situations in its 

 native country, yet is seldom, if ever, found there with a straight clean trunk, 

 which will admit of being sawn up into boards of even moderate dimensions. 

 It is n much branched tree, with the branches, as well as the trunk, somewhat 

 twisted : the branches have a general tendency upwards when the tree is 



