ROSACEZ. 158 
SuB-GENUS I1I.—COMARUM. Linn. 
Petals oblanceolate, acuminate. Stamens very numerous. Fruit- 
receptacle conical, spongy. Carpels very numerous. 
SPECIES XI—POTENTILLA COMARUM. Jesti. 
Prate CCCCXXXVII. 
Benth. Handbook Brit. Bot. p. 195. 
Comarum palustre, Zinn. ab. Man. Brit. Bot. ed. v. p. 96. Hook. & Arn. Brit. Fi. 
ed. viii. p. 128. 
Koch, Syn. Fl. Germ. et Helv. ed. ii. p. 235, ries, Sum. Veg. Scand. p. 44. G7. & Godr. 
Fl. de Fr. Vol. I. p. 535. Sm. Eng. Bot. No. 172. 
Potentilla palustris, Scop. D.C. Prod. Vol. II. p. 583. 
Rootstock extensively creeping. Lower leaves stalked, pinnate 
with 2 to 3 pairs of lateral leaflets; leaflets approximate, elliptical 
or oblong-elliptical, obtuse or acute, coarsely and evenly serrate, 
glaucous beneath ; upper leaves subsessile, often ternate. Stipules 
with the free portion large, ovate-cuspidate, frequently incised. 
Outer calyx-segments strap-shaped, inner ones broadly ovate, 
abruptly acuminated. Petals oblanceolate, acuminate. ecep- 
tacle finely downy, at length elongate-conical, spongy. Carpels 
glabrous. | 
In marshes and spongy peat-bogs. Common in mountainous 
districts, but generally distributed throughout Britain, though rare 
in the South of England. 
England, Scotland, Ireland. Perennial. Summer. 
Rootstock blackish, creeping amongst the mud, branched, the 
divisions terminating in elongated flowering-stems or in barren 
shoots. Stems decumbent at the base, then erect or ascending, 
1 to 2 feet high. Leaflets 1 to 3 inches long, generally all approxi- 
mate, so that the leaf appears to be digitate, with large acute serra- 
tures rounded on their outer margin. Flowers dark-purple, 1 to 
1} inch across, in a terminal cyme. Inner calyx-segments very 
large, much longer than the petals, dull-purple within. Petals 
narrow, dark-purple. Stamens and styles purple. Disk woolly, 
as well as the spongy receptacle, which becomes longer than 
broad. Carpels minute, very numerous, brownish, smooth, with 
the styles persistent. Whole plant sparingly hairy. Leaves 
glaucous underneath. 
. Marsh Cinquefoil. 
French, Comaret des Marais. German, Sumpf Blutauge. 
VOL. III. = 
