208 ICOSANDRIA — rOLYGYNIA. [Dryas. 



Woods, hanks, and dry pastures, frequent. Fl. March, April. If. — 

 Flowers wliite. 



12. Tormenti'lla. Litm. Tormentil. 



1. T. officindlis, Sm. (common Tormentil); leaves ternate all 

 sessile, leaflets lanceolate inciso-serrato, stem ascending dicho- 

 tomous. E. Hot. t. 863. — PotentUla Tormentilld, Sibth. 



Moors and heathy place?, frequent. Fl. June, iu\y. V- • — Root large 

 and woody, used mediciiialiy, and by the Laplanders for staining leather 

 of a red colour. Peduncles axillary and terminal. 



2. T. rcptans, ^railing Tormentil); leaves ternate and qui- 

 nate on footstalks obovato-cuneiform inciso-dentate, stern pros- 

 trate. E. Bot. t. 864. — PotentUla nemoralis, Nestl. — Lehm. Pot. 

 t. 13, (^excellent.) 



Hedge-banks, borders of fields and waste places. Fl. June, July. If. 

 — This, as well as the last, varies with 5 petals, when it becomes difficult 

 to be distinguished from PotentilUi reptans, and many Botanists are of 

 opinion that the two plants are iilentical, their extremes being repre- 

 sented in E. Bot. Rarelv is PotentUla reptans found so much creep- 

 ing as in E. Bot. t. 882 ; nor Torm. reptans so upright, or so decidedl}' 

 panicled as in E. Bot. t. 864. — I am often at a loss to discriminate be- 

 tween the two plants ; and while Mr Wilson finds them undistinguish- 

 able, Mr Forster and Nestler think them quite distinct. 



13. Geum. Linn. Avens. 



1. G. urbdnum, L. {common Avens, Herb Bemiet); lowers 

 erect, cauline leaves ternate, radical ones lyrato-pinnate. E. 

 Bot. t. 1400. 



Woods and hedges, frequent. Fl. June, ll 1 — 2 feet high. Boot- 

 leaves on long foot-stalks. Flowers small, yellow. Petals patent. 



2. G. rivdle, L. ( Water Ave7is); flowers drooping-, awns 

 feathery, cauline leaves ternate, radical ones interruptedly pin- 

 nate and lyrate. E.Bot. t. 106. 



Marshes and wet nioory grounds, frequent ; sometimes very alpine. 

 Fl. June, July. If . — A shorter, but stouter plant than the last. Flowers 

 much larger, with erect purplish calyces and erect dull purplish-orange 

 coloured petals, broadly obcordate, clawed. Head o^ fruit pedicellate, 

 A var. is not uncommon which seems hybrid. Mr J. Wilson finds it 

 with semi-double flowers in Ayrshire. 



14. Dryas. Linn. Dryas. 



1. D. octopetala, L. (lohite Dryas or Mountain Avens); petals 

 8, leaves simple serrated. E. Bot. t. 431. 



Frequent in alpine parts of England, Scotland, and Ireland, especi- 

 ally on limestone : north coast of Sutherland, abundant. Fl. June. If. 

 — Stem short, procumbent. Leaves ovato-elliptical, white and downy 

 beneath, petioled. Flowers large, white. 



