70 



TRANSACTIONS OF THE 



[Sh 



Thus S. VeitcJilana, Bali', til. iioruially has concolorous 

 leaves, but occasionally young rosettes on the runners show 

 a faint white veining. Again, *S'. sarmentosa, Linn. fil. in 

 certain conditions may have some of its leaves concolorous 

 instead of white- veined ; and then there is the var. tricolor' 

 of *S^. sarmentosa, Linn, til., with its uncertain blotching. 

 Some experiments begun a few years ago for the purpose 

 of obtaining evidence have been interrupted, but the subject 

 is one deserving investigation. It may show that some of 

 the species are really growth forms of one. 



One may group the species in the following key: — 



FLAGELLIFEROUS. 



Lamina white-veined above. Toral disk nnilateral : 



Lamina hairy above ..... sarmentosa 



Lamina glabrous above .... cnscutae/ormis 



Lamina white-blotched above. Toral disk circular . dumetorum 



Lamina concolorous above : 



Toral disk nnilateral ..... Veitchiana 



Toral disk circular ..... yeifolia 



NON-FLAGELLIFEROUS. 



Leaves prickly at margin : 



Leaves peltate ...... Henryi 



Leaves not peltate ..... aculeata 



Leaves not prickly at margin : 



Leaves palmatiiid, lamina cuneate at base . . sendaica 



Leaves reniform orbicular : 



Lamina cuneate or truncate at base . . flabellifolia 



Lamina with basal sinus : 



Lamina bronzed beneath .... Fortunei 



Lamina grey green Ijeneath : 



Flower stems densely red hirsute . . rufescens 



Flower stems more or less pilose : 



Capsule truncate .... imparilis 



Capsule with senu-erect style : 



Leaves thick, Hesliy . . . cortusaefolia 



Leaves tliin, dee})ly cut . . . madida 



I add here technical descriptions of the new species of 

 which 1 have spoken in the preceding pages, namely : — 

 tSaxifraga aculeata, Balf. til., S. dutnctortun, Balf. til., 

 >S'. geifolia, Balf. fil., 8. Henryi, Balf. til., /S'. imparilis, Balf. 

 til., ;S'. rnfescena, Balf. fil, >S'. Veitcliiana, Balf. til. 



Saxifraga aculeata, Jialf til. 



Planta etiagellifcra radicibus tibrosis foliis petiolatis. 

 Folia ad 12 cm. longa; lamina ovata aequilateralis coriacea 

 apice acuta basi cordata sinu clauso, margine cartilaginea 



