520 



GROSSULARIACEAE 



Hydrangea 



^50 



Map 1077 



Parnassia glauca Raf 



50 



Map 1078 



Hydrangea arborescens L. 



50 



Map 1079 



Ribes americanum Mill. 



1. Hydrangea arborescens L. Smooth Hydrangea. Map 1078. Rather 

 frequent in one or more of its forms in the southern half of the state, 

 becoming infrequent to very rare northward and possibly entirely absent 

 from the region north of the distribution area shown on the map. This 

 is a woodland species and is usually found in small colonies on the slopes 

 and banks of deep ravines, cliffs, and streams. 



N. Y. to Iowa, southw. to Fla. and La. 



la. Hydrangea arborescens var. sterilis T. & G. Mottier found this 

 rare form in Monroe County and his report (Proc. Indiana Acad. Sci. 

 1919: 59-62. 1921) is the only one of this variety. 



lb. Hydrangea arborescens var. oblonga T. & G. At first I thought this 

 variety was a mere environmental form. About 8 years ago I transplanted 

 some plants into a bed in rich soil with the typical form and the plants 

 have each year had rather small leaves with the blades tapering at the 

 base. In this bed I have transplanted several forms and each year the 

 plants maintain their peculiar forms. The distribution is probably the 

 same as that of the species, and they are included on the same map. 



lc. Hydrangea arborescens var. Deamii St. John. This form is dis- 

 tinguished from the type only by the dense pubescence of the lower sur- 

 face of the leaves. The leaves are of all shapes. Since there is no character 

 other than pubescence to distinguish this variety, it might be better to 

 distinguish it as a mere form of the species. 



Ohio and Ind., southw. to Ga. and westw. to Okla. 



117A. GROSSULARIACEAE Dumort. Gooseberry Family 



[Berger. A taxonomic review of currants and gooseberries. New York 

 State Agric. Exp. Sta. Tech. Bull. 109: 1-118. 1924.] 



Pedicels jointed beneath the ovary; flowers of racemes normally 5 or more; bractlets 



of flowers linear, generally 5-8 mm long; shrubs without nodal spines 



3249. Ribes, p. 521. 



