ROSACEAE. 117 
POTENTILLA. Cinquefoil. 
(Family Rosaceae). 
Small scraggly shrubs or mostly 
herbs: deciduous. Twigs slender, 
subterete, with quickly exfoliat- 
ing bark: pith small, roundish, 
brown, rather spongy. Buds rel- 
atively large, solitary, sessile, ob- 
long, with about 4 somewhat stri- 
ate exposed scales, the inner gray- 
hairy when visible. lLeaf-scars 
much raised on a cClasping 3- 
nerved base bearing the persist- 
ent stipules at top, (or in the 
second at tip of the persistent 
petiole), minute, round: bundle- 
trace 1. ; 
The two woody cinquefoils con- 
sidered here show interesting 
morphological features. P. fruti- 
cosa—the_ winter-characters of 
which are described by Bosemann, 
74, and Schneider, f. 71—forms 
ordinary winter buds, of large size for the plant; and these 
stand in the axils of the persistent stipule-bearing leaf-bases, 
at top of which small abscission scars have been formed. 
The buds of P. tridentata are to be compound with the hiber- 
nacula or subterranean buds in which the growing tips of 
many perennial herbs pass the winter. As in Nandina, dis- 
articulation takes place at a distance above the point where 
the stipules separate from the winged base of the petiole. 
Low-bushy, internodes elongated. (Dasiphora). 
(1). P. fruticosa. 
Stems very dwarf and tufted, covered by the leaf-bases. 
(2). P. tridentata. 
