224 TRANSACTIONS OF THE [Sess. lxxxi 



Rh. Falconeri, Hook. f. — The transition to the adult 

 chalice-hair of the superstratum of the indumentum appears 

 to be early, and is often abrupt, but beautiful blotched 

 states often are seen. 



Rh. jictolacteum, Balf. f. has leaves with red and gland- 

 ular undersurface until its third year, at which stage 

 apparently all the leaves develop the characteristic buff 

 tomentum. 



Rh. Jiaematodes, Franch., in which the adult leaves show 

 a dense tawny tomentum, has the juvenile leaf black- 

 purple and glandular beneath. 



RJt. Hodgsoni, Hook. f. — The seedlings which I have seen 

 pass through a stage in which the underleaf surface loses 

 much of its red colour, without, however, becoming actually 

 green, before the characteristic tomentum appears. 



Rh. lacteum, Franch. shows leaves with green under- 

 surface between the early ones, which have particularly 

 intense red and glandular surface, and the mature leaves 

 with dark tawny somewhat velvety tomentum of stalked 

 rosette hairs. The same transition seems to characterise 

 other species of its series, for instance, RJt. Beesianum, 

 Diels, Rh. fulvum, Balf. f . et W. W. Sm., Rh. Traillianum, 

 G. Forrest. 



Rh. nix>har(jum, Balf. f. et W. W. Sm. has a snow-white 

 bistrate indumentum on the undersurface of the old leaves. 

 The juvenile ones are brilliant scarlet beneath, coated with 

 glands secreting a very viscid mucilage. What form the 

 transition to the tomentose condition takes I do not know. 

 Our seedlings three years old show only a slight lessen- 

 ing in intensity of the redness, but no development of 

 indumentum. 



Rh. Roxieanurn, G. Forrest. — The juvenile leaves are not 

 very glandular on the deep red undersurface, and evidently 

 pass through a green stage before developing indumentum, 

 which has not yet appeared on our three-year-old seedlings. 

 RIt. siriofjraiidc , Balf. f. et W. W. Sm. shows states 

 resembling those of Rlt. argenteu7n, Wall. 



Rli. talie-iise, Franch. has juvenile leaves which appear 

 to pass always througli a stage of gradual lessening of 

 redness on the underside without becoming really green, 

 but none of our seedlings, now some six or seven years 



