6 THE FLORA OF THE ALPS 



narrow, undivided leaves. The following are alpine or 

 sub-alpine : 



B. Flowers yellow ; petals 5; leaves narrow, undivided : 

 R. gramineus, L. ; flowers 1-7, all the leaves linear- 

 lanceolate ; Southern Switzerland, Pyrenees, rare. R. 

 ophioglossifolius, Willd. ; flowers numerous, lower leaves 

 cordate, upper elliptical ; Pyrenees. 



C. Flowers yellow ; petals 5 ; leaves peltate or reni- 

 form : R. Phthora, Crntz. ; leaves reniform, radical 

 leaves on long stalks, root-fibres tuberous ; local. R. 

 Thora, L. ; leaves reniform, radical leaves o, root-fibres 

 tuberous ; Alps, Jura, Pyrenees, local. R. Schottii^ 

 Dalla Torre, Styria, scarcely differs. 



D. Flowers yellow ; petals 5 ; all the leaves more or 

 less divided : R. lanuginosus, L. ; leaves palmately 3-5- 

 partite, the whole plant covered with yellowish hairs ; 

 mountain forests; Switzerland, Jura, Pyrenees, rare. 

 R. pygmceus, Whlb. ; stem with one leat and one very 

 small flower (\ in. diam.) ; high ; Tirol, Salzburg, Car- 

 inthia, rare. R. nemorosus, DC. (aureus, Schleich.; sylva- 

 tzcus, Gren.); flowers large (J to I in.), golden yellow, 

 fruit-stalk furrowed, beak of fruit strongly recurved ; 

 woods. R. polyanthemos, L. ; resembling the last, but 

 flower smaller, beak shorter; woods, rare; Chur. R. 

 Villarsii, DC. (aduncus, G. and G.); stem 6-18 in., 

 beak of fruit hooked ; Southern Switzerland, Carinthia, 

 Pyrenees. R. Gouani, Willd. ; stem 4-15 in., stem-leaves 

 amplexicaul, beak of fruit long, curved; Pyrenees. R. 

 Breynianus, Crntz.; stem iJ-6 in., radical leaves with 

 sharply toothed segments ; Switzerland. R. minutus, 

 Leyb. ; stem I -flowered, sepals narrow, as long as the 

 petals, leaves J in. diam.; Carinthia, rare. R. mon- 



