HYDRANGEA 99 



HYDRANGEA L. (Saxifragaceae) 



Small soft-wooded deciduous shrubs. Twigs round, moderate 

 to thick; pith relatively large, roundish, continuous, pale. Buds 

 solitary, sessile or short-stalked, globose to oblong, with 4 to 

 6 scales. Leaf-scars opposite, crescent-shaped, rather large, 

 often connected by lines around the stem; bundle-traces 3, 5, or 

 7; stipule-scars none. Fruit a membranous capsule, persistent 

 in winter with the flat-topped inflorescence ( cyme ). 



1. K, arborescens L. Wild Hydrangea. A bushy shrub 3-25 

 dm. high; twigs glabrous or nearly so; buds oblong, spreading. 

 Rich woods, Florida to Louisiana and Oklahoma, north to New 

 York and Missouri (Fig. 112). 



RIBES L. (Saxifragaceae) 



Deciduous sometimes spiny shrubs with shredding outer bark. 

 Twigs rounded but decurrently ridged below the nodes, moderate; 

 pith relatively large, pale, round, continuous but becoming porous 

 in age. Buds small, solitary, sessile or short- stalked, ovoid or 

 fusiform, with about 6 scales. Leaf-scars alternate, U-shaped 

 or broadly crescent-shaped; bundle-traces 3; stipule-scars none. 



a. Stems reclining, with a strong skunk- 

 like odor 6. R. glandulosum 



a. Stems erect or arching 



b. Buds ovoid, glandular orpuberu- 

 lent; leaf-scars rather broad 



c. Bud -scales and twigs bearing 

 rather conspicuous sessile resin- 

 glands; buds glabrate 8. R. americanum 



c. Without resin-glands; buds 



gray-puberulent 7. R. triste 



b. Buds elongated -subf us if or m;leaf- 

 scars very narrow 



c. Nodal prickles often large, up 



to 10 mm. long or more; buds 



glossy straw-colored 2. R. missouriense 



c. Prickles smaller; buds dull 



brown 



d. Buds short, 3 mm. long, 



downy 3. R. rotund if olium 



