446 MALACEAE 



1. AMELANCHIER Medic. Service-berry, June-berry, Shadberry. 



Shrubs or small trees. Leaves alternate, simple, petioled, toothed or entire- 

 margined. Flowers in ours racemose. Hypanthium campanulate, becoming 

 globose, adnate to the ovary. Sepals 5, reflexed, persistent. Petals 5, white. 

 Stamens many; filaments subulate. Styles 3-5, rarely less. Ovary inferior or 

 nearly so, the cells becoming twice as many as the styles, by false partitions in- 

 truding from the back. Ovules solitary in each cell, erect. Pome berry-like, 

 6-10-celled. 



Top of the ovary, winter buds, and leaves glabrous from the beginning; fruit juicy; styles 

 mostly 5. 

 Sepals mostly sparingly hairy within. 



Petals oblanceolate, 18-20 mm. long; leaves thin, green. 1. A. Cusickii. 



Petals oblong, 10-15 mm. long; leaves firmer, pallid. 2. A. basalticola. 



Sepals perfectly glabrous on both sides; petals 10-12 mm. long. 

 Leaves green; stjles 5, all united; twigs brown. 



Leaves moderately toothed; lower one-third of the blade entire; teeth rarely 



over 2 mm. long. 3. A. polycarpa. 



Leaves coarsely toothed to near the base; teeth 3-4 mm. long. 



4. A. pumila. 

 Leaves bluish-green; styles 4, two and two xmited; twigs gray. 



11. A. Jonesiana. 

 Top of the ovary and usually the winter buds pubescent; leaves hairy beneath, at least 

 when yomig. 

 Fruit glabrous, in age purple, juicy ; styles mostly 5, rarely 4. 



Leaves glabrous above, white-tomentose but soon glabrate beneath. 

 Leaves mostly acute at the ape.x, toothed to near the base. 



Leaf-blades elliptic, finely toothed, short-acuminate. 5. A. canadensis. 

 I^eaf-blades oval, coarsely toothed, acute or obtuse. 6. A. hitmilis. 



Leaves truncate or rounded at the apex, mostly toothed above the middle. 

 Leaf-blades thin, usually oval. 7. A. florida. 



Leaf-blades firm, usually suborbicular. 8. A. alnifnlia. 



Leaves more or less permanently pubescent on both sides, more or less pale. 

 Leaves neither coarsely toothed nor strongly veined. 9. A. oreophila. 



Leaves coarsely toothed and strongly veined. 10. A. mormonica. 



Fruit even in age more or less pubescent, orange or yellow, not juicy; styles mostly 

 3 or 2. 

 Leaves coarsely toothed; branches gray. 



Leaf-blades suborbicular, tnmcate at the apex. 



Leaves dentate; teeth acute. 12. A. Bakeri. 



Leaves crenate, teeth broad, rounder. 13. A. crenata. 



Leaf-blades oval, acute to roimded at the apex. 14. A. vtahensis. 



Leaves finely toothed; branches brown or cherry-red. 15. A. prunifolia. 



1. A. Cusickii Fernald. A shrub 2-6 m. high, with smooth reddish bark; 

 leaves about 3 cm. long, ovate-oblong, rounded at the apex, or the smaller acutish, 

 serrate, with rather coarse teeth, to near the base; racemes about 6-flowered; 

 sepals lanceolate, acuminate; fruit about 1 cm., scarlet, tardily turning black. 

 Stony hillsides: B.C. — Mont. — (? Utah) — Ore. Submont. Ap-Je. 



2. A. basalticola Piper. A small shrub, with gi-ayish bark; leaves orbicular 

 or oval, mostly truncate at both ends, usually coarsely serrate only above the 

 middle, 1.5-2 cm. long; racemes short, few-flowered; sepals lanceolate, attenuate; 

 stamens 20; fruit 8-9 mm., dark purple. Bluffs and copses: Wash.— Ida. Son. 

 Ap-Jl. 



3. A. polycarpa Greene. A shrub 1-3 m. high or according to original 

 description a small tree, with reddish bark; leaves broadly oval, 2-4 cm. long, 

 deep green above, pale beneath; racemes short; sepals triangular-lanceolate, 

 acuminate; fruit depiessed, globose, 8-9 mm. broad, dark purple, juicy. Hills 

 and table lands: Wyo. — N.M. — Utah. Suhnont. — So?i. Mj^-Jl. 



4. A. pumila Nutt. A low shrub, 0.5-1 m. high, with depressed branches 

 and dark brown twigs; leaves glabrous, broadly oval, rounded at both ends, 

 rather thin, 2-5 cm. long; racemes few-flowered; sepals narrowly lanceolate, 

 attenuate; petals oblong, about 1 cm. long; fruit purple, about 7 mm. thick. 

 Mountains: Wyo. — Utah — Colo. Submont. Je-Jl. 



5. A. canadensis (L.) Medic. A bushy tree, 5-10 m. high, or sometimes a 

 tall shrub; leaves rounded or cordate at base, usually acuminate, sharply and 

 finely serrate, white-tomentose when young, glabrate in age; racemes 3-5 cm. 

 long; sepals broadly oblong-lanceolate, abruptly pointed, tomentose; petals 



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