Some Observations on the Genus Kubus. '•>•> 



Professor Lange (Fl. Dan. tab. 3026) has described and drawn a bramble 

 ander the name of 11. sciaphilus, which grows in many places in Denmark 

 and Sleswig, and which in many particulars puts one in mind of our species. 

 It seems ro me, however, to come yet nearer R. chlorothyrsos, although it is 

 not quite identical with this species. It also resembles R. macrophyllus, "Whe. 



R. scanicus corresponds with R. sciaphilus, in regard to the shortly 

 stalked leaves and leahVts, which underneath are pale green, the long, often 

 leat'v panicle, the narrow, long pointed, after flowering patent and lastly the 

 fruit clasping sepals. But in spite of this accordance, there is scarcely any 

 closer relationship to be l'ound between them. For our species recedes from 

 R. sciaphilus, by the orbicular petals, the short filaments, the glabrous a nthers, 

 the glandulous panicle. which is manyleaved, and by its lower branches being 

 short and bearing fewflowered, corymbous, rarely racemous inflorescences. And 

 in the R. scanicus, the leaflets on the turiones, as well as on the flowering 

 shoots, are generally shorter, more rounded and shorter pointed. 



As regards the structure of the flower, R. scanicus approaches R. Arr- 

 henii, Lge. In both these species the petals are broad, rounded, nearly 

 orbicular, the Filaments shorter than the styles, and the sepals, when the fruit 

 is ripe, more or less erect. The filaments exhibit besides in both species the 

 pecularity, that they after flowering become reddish. Moreover, the turiones in 

 both of them are nearly eglandulous, but the branches of the panicle and the 

 peduncles glandulous. Also, the inflorescence is nearly the same, although the 

 branches and peduncles are much longer in the R. Arrheni. In both 

 these species, particularly, when the panicle is lengthened and Compound, the 

 Bummit of it is deflexed and not seldom leafy. The lowest branches generali)' 

 heu, below the terminal Hower, two peduncles nearly opposite to each other, 

 which bear 2-3-flowered cymes, and below these peduncles and rather distant 

 from them, there are often two others, nearly opposite and also 2-3-flowered 

 cymes. When the inflorescence is very ramified, there is not seldom immedia- 

 tclv under each of its lowest branches, a secondary branch, that bears a eyme. 



On the other band, the inflorescence of the 11. Arrhenii has quite 

 another aspect to that of R. scanicus, as the branches, and peduncles 

 are greatly lengthened so that the flowers are not so crowded together as 

 in R. scanicus. Al.»o the leaves of the former are characterized by their 

 greater thinness and smoothness, and also upon the flowering shoots. vi/,, the 

 lowest of them, they are often quinate; whereby the leaflets on the turiones 

 and flowering slmois are smaller and much oarrower. 



