128 ROSALES 



2. Amelanchier botryapium (L. f.) D. C. Shad-Bush. 

 Along streams mostly along the Niobrara and upper Missouri. Grand 

 Island; Johnston; Long Pine; Ft. Niobrara; Ft. Robinson; Valentine. 



3. Amelanchier ainifolia Nutt. Western June-Berry. 

 Dry soil in the northwestern part of the state. Banner County; Bel- 

 mont; Merriman; Simeon; Sioux County; Valentine, 



14. Prunus. 523. 



Flowers in small few-flowered umbels, appearing with or before the 

 leaves. 

 Thorny shrub or small tree, over 1 m. high, fruit red or yellow. 



1. P. americana. 

 Thornless shrub 2-5 dm. high, fruit black. 2. P. besseyi. 



Flowers in many-flowered racemes at the ends of leafy branches of 

 the season. 

 Shrubs or small trees, leaves with spreading teeth. 



Fruit very astringent, red to nearly black, 8-10 mm. in diameter; 



eastern. 3 .P. virginiana. 



Fruits sweet or but slightly stringent, dark-purple to black, 6-8 



mm. in diameter; northwestern. 4. P. melanocarpa. 



Large trres, leaves with incurved teeth; southeastern. 



5. P. serotina. 



1. Prunus americana Marsh. Wild Plum. 

 Common all over the state. Dismal River; Lancaster; Peru; Thed- 

 ford; Valentine; Wahoo. 



2. Prunus besseyi Bailey. Sand Cherry. 

 Common in sandy soil in the northern and western parts of the 

 state. Antelope County; Banner County; Cherry County; Deuel 

 County; Hat Creek Basin; Pierce; Sheridan County; Thedford; Wei- 

 gand. 



3. Prunus virginiana L. Choke-Cherry. 

 Along streams in the southeastern part of the state. Crete; Lancas- 

 ter County; Peru. 



4. Prunus melanocarpa (A. Nels.) Rydb. Western Choke-Cherry. 

 Prusus demissa (Nutt.) Walp. 



In prairies and dry soil throughout the northern and western parts 

 of the state . Belmont; Hastings; Long Pine; Thedford; Valentine; 

 Wahoo. 



5. Prunus serotina Ehrh. Wild Black Cherry. 

 Rare in woods in the southeastern part of the state. Nemaha; Peru; 

 Weeping Water. 



2. LEGUMINOSAE. 



2a. Subfamily CAESALPINACEAE. 



Leaves once or twice pinnate. 

 Trees; leaves twice-pinnate. 



Thornless trees, leaflets 5-7 cm. long. 3. GymnoQiadus. 



Usually thorny, leaflets 1-3 cm. long. 2. Gleditsia. 



Our species herbs, leaves simply pinnate. 1. Cassia. 



Leaves simple, heart-shaped. * 4. Cercis. 



