The Flora of the Cayuga Lake Basin 101 



15b. S. cyperinus (L.) Kunth, var. pelius Fernald. 

 -Boggy soils ; common. 

 N. Y., N. J., and elsewhere. 



16. S. pedicellatus Fernald. (S. Eriophorum, var. laxus, of Cayuga Fl.) Wool 



Grass. 

 Alluvial marshes ; less frequent than the last-named form. July 20-Aug. 10. 

 Summit Marsh and Spencer Lake ; Jennings Pond ; Cayuta Lake ; South Hill ; 

 n. of Freeville ; Chicago Bog ; common on the Inlet and Outlet Marshes. 

 F. Que. to Conn., N. Y., and Wis., mostly in the interior. 

 Plants with condensed inflorescences occur occasionally. 



17. S. atrocinctus Fernald. 



Boggy meadows and peat bogs, in acid soil ; scarce. June 20-July. 

 High hills n. e. of Slaterville and n. e. of Caroline village ; Ringwood ; n. and 

 n. w. of Freeville ; near Mud Creek, Freeville ; near Grotto. 



Newf. to Hudson Bay and Sask., southw. to Conn., Pa., Mich., and Iowa. 

 A northern plant, especially of granitic regions, not distinctly coastal. 



7. Eriophorum L. 



c. Spikelet solitary, terminal ; leafy involucre none ; leaves narrow, basal. 



1. E. callitrix 

 a. Spikelets 2-several, capitate or umbellate, surrounded by a leafy involucre. 



b. Involucral bract 1, short; leaves 1-2 mm. wide, channeled; achene ellipsoidal. 



2. E. gracile 

 b. Involucral bracts several; leaves 1.5-6 mm. wide, flat. 



c. Spikelets loosely umbellate ; scales lead color, not striate, with a strong mid- 

 rib ; wool white ; leaves 2-6 mm. wide, lax ; achenes obovoid. 



3. E. viridi-carinatum 

 c. Spikelets densely capitate ; scales greenish straw-color, striate ; wool tawny or 



white ; leaves 1.5—4 mm. wide, stiffer ; achenes linear-oblong. 



4. E. virginicum 



1. E. callitrix Cham. (E. vaginatum of Cayuga Fl.) Hare's Tail. Cotton Grass. 



Wool Grass. 

 Peat bogs over acid or somewhat calcareous soil ; scarce. May 20-June 20. 

 Larch Meadow (D.) ; McLean Bogs (D. !); Junius bogs; Duck Lake; Westbury 

 Bog. 

 Lab. to Alaska, southw. to Pa., Mich., Wis., and Man. Found also in Asia. 



2. E. gracile Roth. Cotton Grass. Wool Grass. 



Acid peat bogs, also in calcareous springy places ; scarce. June 10-July 20. 



Michigan Hollow Swamp; Freeville (D.) ; Mud Creek, Freeville; one mile n. of 

 McLean; McLean Bogs; Chicago Bog (D.\) ; "Venice, near R. R." (D.) ; Junius 

 peat bogs. 



Newf. to B. C, southw. to Conn., Pa., Mich., Nebr., and Calif.; occasional on the 

 Atlantic Coastal Plain. Found also in Eurasia. 



The achenes are often 3 mm. long instead of 1.5-2 mm. long, as frequently stated, 

 and the wool is occasionally tawny. The closely related E. tenellum Nutt. should 

 be found in the basin, as it occurs in the adjoining counties toward the east and 

 northeast. A specimen from Junius, 1885 (£>.), seems to be E. tenellum in all 

 characters except the scales, which are greenish. The achenes were not seen. 



