56 



Rosaceae. 



YH.—FOTENTILLA. 



Calyx 8 — lo cleft, alternate segments smaller, petals 4 — 5, 

 numerous on a dry receptacle. 



achenes 



Achenes few (4—10), P. procumbens. 



Achenes many, 255 



255 Leaves pinnate, 256 

 255 Leaves digitate, 257 

 256 Flowers yellow, ....... 



256 Flowers dingy purple, ..... 



257 Flowers yellow, 258 



257 Flowers white, . , „ . , 

 258 Stem ascending, 259 

 258 Stem prostrate, 260 



259 Leaves white beneath, .... 



259 Leaves green, ..... 



260 Stem 3 — 6 inches long, 



260 Stem 4 — 18 inches long, 261 



261 Stem rooting, flowers solitary, petals 5, 



261 Stem not rooting, flowers in cymes, petals 4, 



P. anserina. 

 P. Comarum. 



P. Fragariastrum. 



P. argentea. 



P. alpestris. 



P. verna. 



. P. reptans. 

 P. Tormentilla. 



POTENTIL'LA ANSERI'NA (112). Silver- weed. 6—7. Leaves 

 (491) pinnate serrate silky especially beneath, stem creeping, peduncles 

 axillary single-flowered. Roadsides and waste places . 



POTENTIL'LA FRAGARIAS'TRUM (loi). Barren Strawberry. 



(485) 3 — 5- Leaves ternate, leaflets obovate serrate silky. Dry banks. 



Potentiria ver'na(22). Spring Cinquefoil. 4 — 6. Stem ascending, radical 



(486) leaves of 5 truncate hairy leaflets, flowers ^ inch diameter. 



[G. {Siainforth^ Moughton, Aelcowe Wood), CI. 



Potentiria alpes'tris (14). Alpine Cinquefoil. 6 — 7. Differs little from 



(487) P. verna, but is of more upright growth and has larger flowers, leaflets 

 not truncate, flowers I inch in diameter. [G. [Gordale, Afalham.) 



POTENTIL'LA REP'TANS (89). Creeping Cinquefoil. 6—9. Stem 

 (490) slender eieeping and rooting, leaves digitate, leaflets 5 rarely 3, flowers 

 solitary, petals 5. Meadows and waysides. 



POTENTIL'LA TORMENTIL'LA (112). Tormentil. 6—8. Stem 



(488) slender rarely rooting, leaves digitate, leaflets 3 rarely 5» flowers 

 usually in cymes, petals usually 4. Moors and heathy places. 



POTENTIL'LA COMAR'UM (99). 6—7. Stems decumbent purple, 

 (495) leaves pinnate, flowers purplish brown, petals small. Marshes. 



