46 SPRING FLORA 



1. R. Woodsii Lindl. Stems mostly low, 8-40 inches high. 

 Leaflets 5-7, oblong- or lanceolate to obovate. Flowers pink; 

 l%-2 inches across; solitary or corymbose. Fruit globose with 

 a short neck. (Includes H. Maximilian!! Nees a form with 

 somewhat curved spines and leaflets pubescent beneath; and 

 R. Macounii Greene, with straight or nearly straight spines 

 and leaflets glabrous or nearly so.) 



2. R. A 11 Ik aim Presl. Stems stout, 1-6 ft. high. Leaflets 5-7 

 (rarely y). Flowers large, 2-3 inches across; solitary or 2-3 

 in a corymb. Fruit globose, not contracted above into a neck. 

 (Includes R. melina Greene, a form with slender spines and 

 mostly glabrous leaves; and R. grosse-serrata E. Nelson, with 

 short spines and minutely resinous-dotted, finely pubescent 

 leaves.) 



11. AMELANCHIER. June Berry; Shad Bush. 



Shrubs or small trees with simple, serrate leaves. Flowers 

 in racemes; white (rarely tinged with pink). Calyx-tube bell- 

 shaped, the limb 5-parted. Petals 5. Stamens about 20, short. 

 Pistil 1; styles 5, united below; ovary partly or entirely "in- 

 ferior," 5-celled, but becoming 10-celled in fruit. Fruit a 

 berry-like pome; globose, purplish, edible. 



1. A. aliiifolia Nutt. Service Berry. Shrub 3-15 ft. high. 

 Leaves elliptical; usually entire except at and near apex, 

 where they are serrate. Raceme short, dense. Petals nar- 

 rowly oblong. In dry soil on hillsides. May. 



12. CRATAEGUS. Hawthorn. 



Thorny-branched shrubs or small trees with simple and 

 toothed or lobed leaves. Inflorescence terminal, corymbose. 

 Calyx with a cup-shaped tube and a 5-parted limb. Petals 5; 

 white or pink; spreading; fragrant. Stamens 5-20. Ovary 

 2-5-celled, "inferior." Fruit a drupe, containing 2-5 bony 

 1-seeded carpels. 



1. C. rivularis Nutt. Shrub 9-14 ft. high, with slender red- 

 dish branchlets. Thorns few, stout, slightly curved, '2 l /z in- 

 long or less. Leaves rigid, lanceolate-ovate; serrate; often 

 cuneate. Petals white. Stamens 10; styles 5. Fruit very dark- 

 red to black. On river banks. May. 



LEGUMINOS-flE. Pulse Family. 



, Trees, shrubs or annual or perennial herbs; some 

 species climbing. Leaves alternate; compound or 

 sometimes simple ; stipulate. Inflorescence various. 

 Flowers papilionaceous or sometimes regular; perfect 

 or rarely polygamo-dioecious. Calyx-lobes 4-5; equal 

 or unequal. Stamens diadelphous, monadelphous or 

 rarely separate; usually 10 (sometimes 9 or only 5). 



