127 
HIPPOCASTANACEAE, horse chestnut family 
AESCULUS, buckeye 
Aesculus glabra Willd., Ohio buckeye, p. 1019 
var. arguta (Buckley) Robinson 
var. glabra 
f. pallida (Willd.) Fern. 
var. leucodermis Sarg. (note that Hardin (1957) was unable to 
d correlation among the characters of leaf and bark 
said to differentiate this variety) 
A. pavia L., red buckeye, p. 1022 
HYDRANGEACEAE, hydrangea family 
[S: SAXIFRAGACEAE] 
HYDRANGEA, hydrangea 
Hydrangea arborescens L., wild hydrangea, sevenbark (note that 
plants with all of the flowers showy and functionally 
sterile which have been treated as formae by some 
authors, are best treated as cultivars, undeserving of 
formal taxonomic recognition), p. 782 
ssp. arborescens [S: H. arborescens vat. arborescens, incl. f. 
grandiflora Rehder, var. oblonga Torrey & A. Gray, 
incl. f. sterilis (Torrey & A. Gray) H. St. John; M: H. 
arborescens] (McClintock, 1957) 
ssp. discolor (Ser.) McClint. [S: H. arborescens var. deamii H. 
St. John, incl. f. acarpa (Torrey & A. Gray) H. St. 
John; M: H. arborescens| (McClintock, 1957) 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
