1500 The Trees of Great Britain and Ireland 



2 ft 8 in. in girth in 1908, showed no sign of having been grafted, and had produced 

 three suckers with normal leaves, one being 36 ft. distant from the parent tree and 

 8 ft. in height. There are two trees about 30 ft. high at Kew, differing in habit 

 one, narrow with ascending branches ; the other wider, with pendulous branches. 



III. Flowers differing from those of the type. 



12. Var. Decaisneana, Carriere, in Rev. Hort. 1863, p. 151, with coloured plate. 

 Flowers pale pink, and larger than in the type ; otherwise similar. This 



originated in the nursery of M. Villevielle at Manosque ( Basses- Alpes), and flowered 

 for the first time in 1862. This variety is said to come fairly true from seed. It is 

 well known in English nurseries, and seems to be a very vigorous grower. 



13. Var. lutea, Schneider, Laubholzkunde, ii. 83 (1907). 



Flowers pale yellow. This variety is mentioned by Dumont de Courset, Bot. 

 Cult. vi. 140 (181 1) as var. fore luteo, but it is doubtful if it is now in cultivation. 



14. Var. semperforens, Carriere, in Rev. Hort. xlii. 502 (187 1) and xlvii. 191, 

 with coloured plate (1875). 



A tree of great vigour, producing annual shoots of abnormal length (up to 6 ft. 

 long), which bear flowers continually from June to September. This originated as a 

 single seedling in M. Durousset's nursery at Genouilly (Seine et Loire), and has been 

 in commerce since 1875. The original tree was transplanted in 1874 into the Jardin 

 des Plantes at Paris, and was remarkable for its constant production of numerous 

 flowers. Carriere counted on one branch no less than 145 racemes. 



Hybrids 



1. Robinia dubia, Foucault, in Desvaux, Journ. de Bot. ii. 204 (1813); Loudon, 

 Arb. et Frut. Brit. ii. 627 (1838). 



Robinia ambigua, Poiret, in Lamarck, Encyc. Suppl. iv. 690 (18 16). 

 Robinia intermedia, Soulange-Bodin, in Ann. Soc. Hort. Paris, ii. 43 (1828). 



This hybrid between R. Pseudacacia and R. viscosa is a small tree, differing mainly 

 from the first named species in the young branchlets and flowering peduncles being 

 slightly viscid-glandular and in the flowers being pale pink. It has been in cultivation 

 about 150 years. 1 . 



2. Robinia bella-rosea, Nicholson, Diet. Garden, iii. 310 (1887). 



This is similar to the last, but the branchlets are more plainly viscid-glandular, 

 whilst the flowers are larger and deep pink in colour. 



3. Robinia Holdtii, Beissner, in Mitt. Deut. Dend. Ges. xi. 117 (1902); Koehne 

 in Gartenfora, Hi. 272 (1903). 



A hybrid between R. Pseudacacia and R. neomexicana, which originated 2 about 

 1890 in Mr. Von Holdt's garden at Alcott in Colorado. Leaflets larger than those 

 of R. neomexicana, darker green than those of R. Pseudacacia. Flowers varying in 

 colour, white flushed with pink or deep pink. A few stalked glands occur on the 

 flowering peduncle and on the pod. 



1 It is possibly R. echinata, Miller, Diet. ed. 8, No. 2 (1768). 

 * Beissner, op. tit. 118, states that a similar plant also originated in Spath's nursery. 



