Malaceae 221 
CC. Calyx-segments persistent. 
E.  Infra-stipular spines none. E. CR. blanda for our region.) 
R. sayi Schw. (Prickly Rose) 
EE.  Infra-stipular spines usually present. 
F. Flowers solitary; fruit 2 cm. or less wide; rachis of leaves not prickly nor 
pubescent. W. C. E. R. nutkana Presl. (Nutka Rose) 
FF. Flowers in corymbs, rarely solitary; fruit | cm. or less wide; rachis of 
leaves prickly or pubescent. W. C. CR. californica for our region.) 
R. pisocarpa Gray (Bunched Rose) 
MALACEAE (Pomaceae) Apple Family 
Trees or shrubs. Leaves alternate, simple or odd-pinnate; stipules caducous, free 
or nearly so. Flowers perfect, regular, white or reddish, in raceme-like or corymb-like 
clusters. Calyx-tube urn-shaped or campanulate, somewaht lined with a disk: segments 
5. Petals 5, on the calyx-cup. Stamens mostly 20, on the calyx. Ovary inferior, com- 
pound ; carpels 2—5, 2-ovuled; styles as many as the carpels. Fruit a pome. 
A. Leaves pinnately compound. SorBus (p. 221) 
AA. Leaves simple. 
B. Leaves linear-lanceolate to oblanceolate: plant, 1—2 m. high; flowers 1—2 in 
a cluster. PERAPHYLLUM (p. 222) 
BB. Leaves wider; plant usually taller; flower-clusters usually larger. 
C. Smaller branches with stout thorns; flowers in corymbs; fruit with stony car- 
* pels. CRATAEGUS (p. 222) 
CC. Plant without thorns; fruit with papery carpels. 
D. Flowers in corymbs; fruit yellowish-green, having the appearance of a small 
apple. Pyrus (p. 221) 
DD. Flowers in racemes; fruit black or purplish, having the appearance of a 
berry. AMELANCHIER (p. 222) 
SORBUS ' MOUNTAIN ASH 
Shrubs or small trees. Leaves odd-pinnate, deciduous. Flowers small, in ter- 
minal compound cymes. Calyx urn-shaped. Styles 3——5, distinct. Carpels 3—5, 
coriaceous, |-celled, 2—5-ovuled, |-seeded. Fruit small, globose or pyriform. (A 
Latin name for the Service-tree, Pyrus domestica.) 
A. Leaflets dull, serrate only near the apex; fruit purple, glaucous. W.C.E. (Py- 
rus occidentalis. ) S. occidentalis Gr. 
AA. Leaflets shining, serrate from near the base; fruit coral-red. W. C. E. (Pyrus 
sitchensis; S. sambucifolia for our region; S. scopulina.) 
S. sitchensis Roem. 
PYRUS APPLE 
Trees, small. Leaves deciduous, simple, more or less serrate, sometimes somewhat 
3-lobed in ours. Flowers white to pink, in simple corymbs at the ends of short 
lateral branches. Calyx-tube urn-shaped. Styles 5, more or less united at base. Carpels 
5, chartaceous in fruit, 2-seeded, I-celled, wholly covered by the adnate calyx-tube. 
Fruit globose or oblong or pyriform, depressed at both ends, acid. . (The Latin name of 
the pear.) 
A. Fruit widest at or below the middle, without grit-cells. 
B. Leaves often somewhat 3-lobed, white-pubescent benéath; fruit 8—12 mm. wide, 
15—20 mm. long. W. (Malus rivularis.) 
P, rivularis Bong. (Crab-apple) 

