120 ROSACEAE. 
CEeRcoGARPUS. Mountain Mahogany. 
(Family Rosaceae). 
Shrubs or small trees: ever- 
green. Twigs terete, rather slen- 
der, commonly forming dwarf 
spurs closely covered by old leaf- 
scars: pith minute, rounded. Buds 
solitary, sessile, round, with 2 
outer scales, quickly developing. 
Leaf-sears alternate, minute, half 
round, at top of the stipulate-base, 
or transversely linear and low 
with 3 bundle-traces after the fall 
of this base. Leaves obovate, 
flat and toothed, or lanceolate, re- 
volute and- entire. 
No one who has walked in the 
western mountains in late summer 
can have failed to have his atten- 
tion drawn to one or other of the 
species of Cercoparpus by the 
clematis-like clusters of feathery 
fruits that terminate its short 
twigs, and from which the name of the genus has been de- 
rived. There is a marked contrast between the leaves of the 
first two species and of the other two. 
¥, 
2. 
3. 
Leaves toothed and nearly flat. 2. 
Leaves entire and very revolute, varnished. 3. 
Teeth rounded: Rocky Mountains. (1). C. parvifolius. 
Teeth pointed: California. (2). C. betulaefolius. 
Leaves minute (1x5 mm.), teretely revolute. 
(3). C. intricatus. 
Leaves larger (25 mm. long), revolute at margin. 
(4). C. ledifolius. 
