The Flora of the Cayuga Lake Basin 335 



13. Arctostaphylos Adans. 



1. A. Uva-ursi (L.) Spreng., var. coactilis Fernald & MacBride. (See Rhodora 

 16:212. 1914. A. uva-ursi of Cayuga Fl.) Bearberry. 



Dry exposed sandy or gravelly acid soils; rare. May. 



Six Mile Creek, nearly extinct (D.) ; Taughannock Gorge, on rocks n. side 

 above the falls (£>.!) ; roadside, Connecticut Hill. 



Arctic regions, southw. to N. J.-, Pa., and Mo. ; most abundant on the northern 

 Coastal Plain. 



14. Epigaea L. 

 1. E. repens L\ Trailing Arbutus. Mayflower. 



Damp or rather dry sandy or gravelly acid soils, usually with chestnut ; common. 

 Apr. 15-May 10. 



Abundant on the hills of Spencer, Danby, Caroline, and parts of Dryden ; 

 occasional in the ravines and on the rocky shores of Cayuga Lake near Ithaca, and 

 in the sands n. of the lake ; absent in the McLean region and in the clays and 

 richer soils back from the lake shore. 



Newf. to Sask., southw. to Fla., Ky., and Mich., including the Coastal Plain. 



A form with the corolla lobes sharply reflexed occurs on the hills at North 

 Spencer. 



15. Chiogenes Salisb. 

 1. C. hispidula (L.) T. & G. Moxie Plum. Capillaire. Creeping Snowberry. 



On hummocks, logs, and stumps, in more or less calcareous sphagnum swamps ; 

 scarce. May 15-30. 



Fir Tree Swamp, Danby (D.) ; Brookton Springs (D.) ; Mud Creek, Freeville 

 (£>.!); Malloryville Bog (in C. U. Herb., collector unknown) ; Wyckoff Swamp 

 (D.) ; Westbury Bog (L. Griscom, F. P. Metcalf, & A. H. Wright). 



Lab. to B. C, southw. to N. C, Mich., and Minn.; infrequent on the Coastal 

 Plain. 



16. Vaccinium L. 28 



a. Corolla plainly gamopetalous, 5-toothed or 5-lobed ; plants with deciduous leaves. 

 b. Corolla open-campanulate, strongly 5-lobed ; anthers 2-awned on the back, 



exserted; fruit greenish. 1. V. stamineum 



b. Corolla urceolate or cylindraceous, 5-toothed ; anthers awnless, included ; fruit 

 blue-black. 

 c. Habit dwarf; plants of dry soil (except often no. 4); leaves 2-4.5 cm. long; 

 corolla short-cylindrical, 4-7 mm. long. 

 d. Leaves glabrous, or hairy on the midrib only ; twigs pubescent only in 

 lines. 

 e. Blade elliptic-lanceolate, acute at each end, green on both sides, finely 



serrulate. 2. V. pennsylvanicum 



e. Blade elliptic-oval or obovate, acute or obtuse, glaucous especially beneath, 

 entire or rarely serrulate. 3. V, vacillans 



d. Leaves downy, at least on the under side, entire ; twigs very pubescent. 



4. V. canadense 

 c. Habit taller, 1-4 m. high; plants normally of wet soil, rarely in dry situa- 

 tions ; leaves 4-8 cm. long ; corolla usually long-cylindrical, 6-9 mm. long. 

 </. Leaves entire. 

 e. Leaves more or less pubescent. 5. V . corymbosum 



e. Leaves glabrous. 5a. V. c, var. glabriun 



d. Leaves serrulate, pubescent or nearly glabrous. 5b. V. c, var. amoenum 



28 A polymorphic genus clearly set off from related genera by good structural characters. Its 

 members fall into several natural subgenera or sections, which by many botanists are considered 

 separate genera. 



