94 ROSACEA. [Dryas. 



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

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

 dichotomous. Br. Fl. \.p. 253. E. FL v. ii. p. 427. E. Bot. 

 t. 8Q3.—Potentilla Tormentilla, Sibth. Ncs'l.—Potentilla erecta, 

 Linn. 



Moors and heathy places, frequent. FL June, July. %. — Root 

 large and woody, used medicinally, and by the Laplanders for staining 1 

 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. 8G4. — Potenlilla nemoralis, Nestl. 



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

 Fl. June, July. %. 



8. Geum. Linn. Avens. 



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

 with long geniculated awns. Receptacle elongated. — Name 

 from <yevw, 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. %. — One to two feet 

 high. Root-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. Fl. 1 . 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. Dryas. 



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

 with long feathery awns. — Name £pvs, the oak, from a distant 

 similarity between their leaves. 



Icosandria. Polygynia. 



1. D. oclopetala, Linn. White Dryas on Mountain Avens. 

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

 ii. p. 432. E. Bot. t. 451. 



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

 Mr. Templeton. Benyevena, County of Derry ; Mr. D. Moore. 

 Fl. June. If.. — Stem short, procumbent. Leaves ovato-elliptical, 

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



