POTENTILLA.] ROSACES. 1 25 



lobes ovate; bracteoles linear, as long. DISTRIB. Europe (Arctic), W. 



Siberia, Azores. Kootstock strongly astringent, used for tanning. 

 P. TORMENTII/LA proper ; erect or suberect, cauline leaves sessile 3-foliolate, 



flowers cymose. Tormentilla erecta, L. ; T. officinaflis, Curt. 

 Sub-sp. P. PROGUM'SEXS, Sibth ; procumbent, cauline leaves 3-5-foliolate often 



petioled, flowers few or solitary. P. nemora'lis, Nestl.; Tormentil'la rep'tans, L. 



5. P. rep'tans, L. ; stem slender creeping and rooting, leaves digitately 

 5- rarely 3-foliolate long-petioled, flowers solitary on slender axillary ped- 

 uncles, petals 5 yellow, achenes granulate. 



Meadows, waysides, and pastures, from Banff and Cantire southd. ; Ireland ; 

 Channel Islands ; fl. June-Aug. Very variable in size and pubescence ; 

 usually larger than P. Tormentil'la^ and having besides the above characters 

 bracteoles as broad as the sepals. Flowers |-1 in. diam., homogamous. 

 DISTRIB. Europe, from Gothland southd., N. and "W. Asia, Himalaya, 

 Canaries, Azores. 



P. mixta, Nolte, is a supposed hybrid with P. Tormentil'la. 



6. P. ver'na, L. ; stem prostrate, leaves digitately 5 -7-foliolate, leaflets 

 obovate or cuiieate truncate deeply crenate or lobulate towards the tip, 

 flowers several yellow, achenes smooth glabrous. 



Hilly rocky places, local ; from Forfar to Cambridge and Somerset ; fl. April- 

 June. More or less hairy. Rootstock woody, branched, tufted. Radical 

 leaves 2-3 in. ; stipules with narrow subulate tips ; leaflets |-| in., green on 

 both surfaces; terminal tooth short; cauline 1-3-foliolate, their stipules 

 ovate-lanceolate. Flowers few, Jin. diam., homogamous. DISTRIB. Europe 

 (Arctic), Siberia, W. Asia, Himalaya. 



7. P. salisburgen'sis, ffaenke ; stem ascending, leaves digitately 5-7- 

 foliolate, leaflets obovate or cuiieate deeply crenate or serrate usually above 

 the middle, flowers several yellow, achenes smooth glabrous. P. alpes'tris, 

 Hall. f. ; P. au'rca, Sm. not L. ; 7*. macula! ta, Pourr. 



Kooky alpine ledges, local, from Aberdeen and Argyll to York and Wales ; 

 ascends to 2,700 feet in the Highlands ; fl. June-July. Probably a large 

 form of P. ver'na, with ascending stems, 4-10 in., larger less truncate 

 leaflets (but not constantly so), and flowers 1 in. diain. DISTRIB. Europe 

 (Arctic), N. and W. Asia, Greenland, Labrador. The name P. macula'ta is 

 coeval with Salisbury en' sis. I have taken the latter because the spotted- 

 petalled form (which occurs on Ben Lawers) is a scarce one. 



8. P. anseri'na, L. ; stoloniferous, silky, leaves interruptedly pinnate, 

 leaflets many deeply serrate or pinnatifid, the alternate minute, flowers 

 solitary yellow, achenes glabrous smooth. Silver Weed. 



Roadsides and damp pastures, N. to Shetland ; ascends to 1,200 ft. in Derby ; 

 Ireland; Channel Islands; fl. July-Aug. Eootstock slender, branched. 

 Stems 0. Leaves 2-5 in., silvery beneath, stoloniferous from their axils ; 

 leaflets J-2 in., alternate, close-set, sessile, obovate oblong, obtuse, serratures 

 tipped with silky hairs ; stipules calyptriform, enclosing the buds. Flowers 

 |-f in. diam., on solitary axillary slender peduncles, homogamous ; bracteoles 



