270 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



M. de Yilmorin has succeeded in flowering for the first time in 

 Europe some rare and valuable rhododendrons from the mountains of 

 Su-Tchuen, in the north-west of Ichang, and a short description of 

 them is here given. — M. L. H. 



Rhodora canadensis (Rhododendron). By E. Eothe (Die 

 Gart. ; February 19, 1910, p. 86). — A pretty shrub, with deciduous 

 oblong leaves, whitish beneath. The flowers are small, and pro- 

 duced in umbellate clusters. The author describes the remark- 

 able and pretty effects these flowering shrubs make ; ordinarily 

 they grow in the regions of Northern Canada in low boggy places in 

 great numbers, surrounded by the graceful but monotonous white 

 barked birch, and higher up the sombre pine and fir tree. It is one of 

 the first of spring flowers when the snow has not quite disappeared, and 

 it is a most delightful sight to see the groups of Rhodora still without 

 foliage in these surroundings. In England during a mild winter 

 Bhodora flowers in February and March, otherwise not till April. 



G. R. 



Rodg-ersiapinnata. By W. Irving (Garden, Oct. 30, 1909, 

 p. 531 and fig.). — This is the most handsome of the Eodgersias, grow- 

 ing about 5 feet high; it is later in starting than R. podophylla, but 

 lasts longer in perfection, and the leaves are not so liable to sunburn. 

 The Eodgersias are excellent for the moist and shady parts of the 

 rock-garden; seedlings are freely produced, but slow in 'developing. 

 T. Smith (Garden, Nov. 13, 1909, p. 551) considers R. fodophylla 

 still without a peer in respect of leaf -colouring. The leaves develop a 

 purple-crimson colour in July, and in autumn exhibit the brightest 

 leaf -colouring to be found among herbaceous plants. — H. R. D. 



Roots, Anatomy of. By Hermann von Alten (Bot. Zeit. Ixvii. 

 1 Abt. Heft x./xi. Oct. 1909, pp. 175-199, with 2 plates and 8 figs.).— 

 The author criticizes Tschirch's researches on root-structure, and lays 

 stress on the difference in that of young roots as compared with older 

 ones. He distinguishes annexation (Bereicherungs) and nourishment 

 (Ernakrungs) roots. There are also remarks on the number of xylem 

 groups in one and the same root-system and on the hypodermis, and 

 on exogenous cork-building in roots. — G. F. S.-E. 



Rosa Seraphini. By J. F. (Garden, Dec. 11, 1909, p. 599).— 

 This rose was introduced in 1900. Its peculiar beauty for the rock- 

 garden is rightly insisted on. It is a mountain-rose from Corsica, 

 Sardinia, and Sicily, and found above 1,600 feet high in the Apuan 

 Alps. Two varieties of it are found in the Maritime Alps. It flowers 

 profusely while only 12 to 15 inches high, and the thorny stems are 

 furnished with numerous short shoots, each terminating in a bright 

 rose flower 1-^ inches in diameter. A little bush thus gets quickly 

 covered with brightly coloured miniature flowers that associate well 

 with the numerous occupants of the rockery. The leaves are 1^ to 



