48 Comarum Le liarsh Cincuefoil. 
Peremnia, herbs with elongate, creeping rootstocks, rooting in mud 
and water, @™e leaves odd-pinnate Flowers few in a terminal cyme. Calyx 
5-parted, the tube saucer-shaped, the sepals alternating with sepal-like 
appendagese Petals 5, purple. Stamens about 20, inserted near the base of 
the receptacle. Receptacie hemispheric, enlarging and becoming somewhat 
Fruit a cluster of achenes. 
spongy in fruit. Styles slender, even, attached near the middle of the ovary : 
1. Ce palustre Le —>A perennial herb with branching reclining 
stems 1 me long or more, forming mats, the upper part erect, glabrous and 
glaucous, the internodes longer than the leaves; leaves mostly towards the 
base, the petioles 3-6 cm. long, clasping, expanded towards the base into 
membranous stipules 2-3 cme long, the blades subequal to the petioles, 
pinnately 5-7-foliolate, the lower pair of leaflets smaller and more remote, 
the leaflets oblong-elliptical, 5-6 cm. long, mostly obtuse at both ends, 
subsessile, glabrous on the upper surface, bes lower thinly ee 
glaucous, the margin sharply serrate; < : 
wai raduaad,_tha-peddeete-+-¢-ary-Sngy -bereeteracinpelatabany eal pana 
and green, the lobes ovate-lanceolate,sl0-12 mm. long, scu@inate, enlarged in 
fruit and enclosing the achenes, the appendages half the-4 eh or less, both 
thinly hirtellous; petals oval or elliptical, 4-5 mn. long, shortly acuminate, 
a rich purples stamens 3 mme long, deep purple, arranged in 2 series, the 
receptacle hispid, lengthening to 5-6 mm. in fruit; ovaries glabrous, half 
the length of the purple style which is attached at thei base, becoming sub- 
globose in fruit, 1.2 mm. in diameter, the receptacle globose, 8-10 mm. in 
diameter, hairy. ———>(Potontilla palustris Scop.), 
Occasional in marshy ground of river bottoms or wet meadows throughout 
QP our range. 
ee Sate Se ee 
