222 Malaceae 
BB. Leaves not lobed; fruit larger. 
C. Leaves glabrate; calyx-lobes glabrate outside; fruit 3 cm. or less wide. W. E. 
P. baeceata L. (Siberian Crab) 
CC. Leaves white-pubescent beneath; calyx-lobes white-pubescent outside; fruit 
mostly larger. W. E. BP. malus L. (Cultivated Apple) 
AA. Fruit widest above the middle, with grit-cells. W. E. 
P. communis L. (Cultivated Pear) 
AMELANCHIER SERVICH-BERRY 
Shrubs or small trees. Leaves simple, deciduous. Flowers white, in small racemes. 
Calyx-tube campanulate. Styles 3—5, united at base or distinct. Carpels 3—5, be- 
coming membranous, incompletely 2-celled by a partition from the back, 1-seeded, wholly 
covered by the adherent calyx. Fruit small, berry-like, black or purplish, edible, sweet. 
(The French name for a cultivated hawthorn.) 
A. Twigs pale or ashy. 
B. Leaves cuneate at base. E. (A. alnifolia for our region.) 
A. cuneata Pip. 
BB. Leaves rounded at base. 
C. Calyx-lobes erect; leaves 4 cm. or less long. U. 
A. pallida Gr. 
CC. Calyx-lobes reflexed; leaves 2.55 cm. long. E. 
A. utahensis Koehne 

AA. ‘Twigs not ashy. 
D. Leaves tomentose beneath when young. 
E.. Petals 12—15 mm. long. W. C. E. 
A. florida Lindl. 
Dates s EE. Petals about 8 mm. long. E. 
& > A. oreophila Nels. 
x, es DD. Leaves glabrous even when young. 
\ rw F. Leaves bright-green; petals about 2 cm. long. E. 
A. basalticola Pip. 
Re ek e PERAPHYLLUM 
oa & Shrubs, low, much branched. Leaves deciduous, linear-lanceolate or oblanceolate, 
oe crowded at the ends of the branchlets. Flowers white, solitary or 2—4 in an umbel. 
>, Calyx urn-shaped. Styles 2, rarely 3. Fruit a pome containing 2—3 almost distinct’ 
Gaene each 2-celled by a spurious partition; cells |-seeded. Seeds angular, flattened. 
<~ (Apparently Gk. per—thru, a—without, phyllon—a leaf; referring to the narrow leaves 
A bunched at the branch-tips.) E. 
P. ramosissimum Nutt. 
CRATAEGUS HAWTHORN 
Shrubs or small] trees, thorny. Leaves simple, toothed or lobed. Flowers white, 
in terminal corymbs. Calyx-tube urceolate. Stamens 5-20. Carpels 2—5, becoming 
ny i \e- A. cusickii Fer. 
\\ XN 4 FF. Leaves whitish-green; petals 1—1.5 cm. long. E. 
pl net 
one 
. bony |-seeded nutlets, contiguous or united; styles distinct. Fruit drupe-like, globose or : 
ovoid, crowned with the calyx-teeth. (Gk. kratos—strength; referring to the toughness 
of the wood. ) 

