318 ROSACEAE 
tufts. Leaflets 3, oblong, broad at apex and terminated by 3 conspicuous 
teeth. Flowers white, about 1/3 in. broad, few, in terminal cluster. 
Rocky places, especially on high mountains. June-Aug. 
1l. P. Anserina, L. (Fig. 6, pl. 65.) SttveR WeEEp. Goose Grass. 
Stem slender, trailing, rooting at nodes. Leaflets many, silky. Flowers 
yellow, about 1 in. broad, solitary. Moist places, throughout our area. 
June-Sept. 
12. P. canadensis, L. (Fig. 1, pl. 65.) Five-FINcerR. ComMMON 
CINQUEFOIL. Stems slender, running on ground and spreading by run- 
ners which are from a few inches to 2 ft. long. Leaflets 5 from a com- 
mon center, toothed at borders. Common in fields and road-sides. April- 
August. 
1o. COMARUM, L. 
A stout herb, nearly smooth, with purple flowers. General appearance 
that of a Potentilla (P. palustris of Gray). Stamens and pistils numer- 
ous. 
C. palustre, L. (Fig. 4, pl. 66.) PuRpLe CINQUEFoIL. Mars FIVvE- 
FINGER. (Potentilla palustris, (L.) Scop.). Prostrate herb with stems 
4 to 2 ft. long, rooting along the stems. Leaves of 5, or more frequently 
7 leaflets, which are oblong, but broader at apex than at base, sharply 
toothed at borders, 1 to 3 in. long. Stipules broad, enfolding the leaf 
stems. Flowers purple inside, about 1 in, broad. In swamps and peat 
bogs, north to south as far as New Jersey. June-Aug. 
11, SIBBALDIA, L. 
Low, decumbent, shrubby plant found on summit of high mountains. 
Leaves of 3 leaflets. Flowers with broad calyx of 5 divisions and with 
small petals extending only about 4 the length of the calyx segments. 
Stamens 5, pistils 5 or 10. 
S. procumbens, L. (Fig. 5, pl. 66.) SipBALpDIA. Creeping, densely 
tufted, woody stems. Leaflets 3, wedge-shaped. Flowers yellow, the 
calyx much larger than corolla. Summits of White Mountains. 
12, WALDSTEINIA, Willd. 
Herb with appearance of strawberry. Leaves and flowering stem from 
the root, 3 leaflets, each broadly wedge-shaped, with lobed and serrated 
borders. Flowers of 5 yellow petals and 5 sepals, the calyx top- or in- 
verted cone-shaped. Stamens numerous, inserted into the throat of the 
calyx. Seed cases 2 to 6. 
W. fragarioides, (Michx.) Tratt. (Fig. 6, pl. 66.) Barren Straw- 
BERRY. Plant 4 to 6 in. high. The flower scape bearing 3 to 8 yellow 
flowers Wooded hills, New England and westward. May-June. 
13. GEUM, L. 
Herbs. Pistils numerous, each carpel with one ovule; the seed casket 
becoming dry fruit when ripe, the styles becoming hairy tails. Calyx 
of 5 parts with 5 alternating small bracts. Leaves compound, feather- 
formed, i. e., of several leaflets arranged along each side of the common 
leaf stalk, the terminal leaflet being in most instances much larger than 
