The Flora of the Cayuga Lake Basin 337 



length of corolla and size of leaves at flowering time, as well as in shape and pubes- 

 cence of leaves, but these variations do not seem to be correlated in any way. In 

 South Hill Marsh there are many plants having the appearance of a hybrid between 

 V. corymbosum and various dwarf species. 



5a. V. corymbosum L., var. glabrum Gray. (Gray's Man., ed. 2, p. 250, 1856, 

 and Synopt. Fl.) 



In situations similar to the preceding. 



With the typical form in most of the bogs: Michigan Hollow; South Hill Marsh; 

 Mallory ville Bog ; McLean Bogs ; and elsewhere. 



Range same as that of the typical form. 



5b. V. corymbosum L., var. amoenum (Ait.) Gray. 



In situations similar to the preceding; infrequent. 



Small pond near Enfield Falls ; Michigan Hollow Swamp ; e. of Dryden Lake ; 

 Malloryville Bog. 



Mainly in the Middle Atlantic States (Gray) ; N. S. (Femald). 



6. V. Oxycoccus L. Small Cranberry. 



Boggy acid soils with sphagnum, chiefly on the moor of peat bogs ; infrequent. 

 June-July. 



Freeville (Dr. Jordan, D.) ; Malloryville Bog (DA); McLean Bogs (D. !) ; 

 Summit Marsh (D.) ; Junius peat bogs (D. !) ; Featherbed Bog. 



Arctic regions, southw. to Pa., Mich., and Wis., including the northern Coastal 

 Plain. Found also in Eurasia. 



Only the typical form has been found in the Cayuga Lake Basin. 



7. V. macrocarpon Ait. Large Cranberry. 



In acid bogs, but also in more marly places ; infrequent. July-Aug. 



Sedgy and boggy calcareous moor of Mud Pond, McLean Bogs ; Chicago Bog ; 

 Junius peat bogs ; sedgy moor of Stark Pond. 



Newf., Lake Erie, and Wis., southw. to N. J., W. Va., and Ark., including the 

 Coastal Plain. 



Along the coast this plant often grows on sand. 



17. Gaylussacia HBK. 



1. G. baccata (Wang.) K. Koch. (G. resinosa of Cayuga Fl.) Black Huckle- 

 berry. 



Dry open woods and thickets, in sandy or gravelly acid or even neutral soils, also 

 in peat bogs especially in sandy regions ; frequent. May. 



On the hills w., s., and e. of Ithaca, on the crests of the ravines and cliffs along 

 the shores of Cayuga Lake, and in the sands n. of the lake ; absent in the McLean 

 region and on the clays and richer soils back from the lake shores. Bog stations : 

 Headwaters Swamp; South Hill Marsh (D. !) ; Woodwardia Bog (D. !) ; Newton 

 Ponds (D.) ; Junius peat bogs. 



Newf. to Man., southw. to Ga., 111., and Wis., including the Coastal Plain. 



Apparently in shaded places the leaves may become broader and more obtuse. 



100. PRIMULACEAE (Primrose Family) 



a. Plant acaulescent; lobes of the corolla imbricated, pink. 1. Primula 



a. Plant leafy-stemmed. 



b. Ovary half inferior; lobes of the corolla imbricated, white. 2. Samolus 

 b. Ovary superior ; lobes of the corolla convolute. 



c. Capsule vertically dehiscent ; flowers yellow or white. 



d. Flowers yellow, axillary or in terminal or axillary racemes. 



