94 ROSACES. [Dryas. 



1. T. officinalis, Sm. Common Tormentil. Leaves ternate, 

 all sessile ; leaflets lanceolate, inciso-serrate ; stem ascending, 

 dichotomous. Br. Fl. 1 . p. 253. E. Fl. v. ii. p. 427. E. Bot. 

 t. 863. Potentilla Tormentilla, Sibth. Nestl.Potentilla erecta, 

 Linn. 



Moors and heathy places, frequent. FL June, July. 1. Root 

 large and woody, used medicinally, and by the Laplanders for staining 

 leather of a red colour. Peduncles axillary and terminal. 



2. T. reptans, Linn. Trailing Tormentil. Leaves ternate 

 and quinate on footstalks, obovato-cuneiform, inciso-dentate ; 

 stem prostrate. Br. Fl. 1. p. 253. E. FL v. ii. p. 428. E. 

 Bot. t. S64.Potentilla nemoralis, Nestl. 



Ditch banks near the Botanic Garden, Cork ; Mr. J. Drummond. 

 Fl. June, July. *2. 



8. GEUM. Linn. Avens. 



Calyx 10-cleft, alternate segments minute. Petals 5. Pericarps 

 with long geniculated awns. Receptacle elongated. Name 

 from <yevwj to yield an agreeable flavour. The roots of G. 

 urbanum are aromatic. Icosandria. Polygynia. 



1. G. urbanum, Linn. Common Avens> Herb Bennet. Flowers 

 erect ; cauline leaves ternate, radical ones lyrato-pinnate. Br. 

 FL 1. p. 254. E. FL v. ii. p. 429 E. Bot. t. 1400. 



Woods and hedges, frequent. Fl. June. 2. One to two feet 

 high. Hoot-leaves on long footstalks. Flowers small, yellow. Petals 

 patent. 



2. G. rivale, Linn. Water Avens. Flowers drooping ; awns 

 feathery ; cauline leaves ternate, radical ones interruptedly pin- 

 nate and lyrate. Br.JP/. ]. p. 254. E. Fl. v. ii. p. 430. E. 

 Bot. t. 106. 



Woods and sides of mountains. Woodlands, County of Dublin, 

 Brandon Mountain, &c. often proliferous. FL June, July. %. 



9. DRYAS. Linn. Dry as. 



Calyx 8 10-cleft, its segments equal. Petals 5 8. Pericarps 

 with long feathery awns. Name Spvs, the oak, from a distant 

 similarity between their leaves. 



Icosandria. Polygynia. 



1. D. octopetala, Linn. White Dry as on Mountain Avens. 

 Petals 8; leaves simple, serrated. Br. Fl. 1. p. 254. E. Fl. v. 

 ii.p. 432. E. Bot. t.45l. 



Burren mountains, County of Clare, abundant. County of Antrim ; 

 Mr. Templeton. Benyevena, County of Deny ; Mr. Z>. Moore. 

 FL June. 1. Stem short, procumbent. Leaves ovato-elliptical, 

 white and downy beneath, petioled. Flowers large, white. 



