The Flora of the Cayuga Lake Basin 233 



1. C. bulbosa (Schreb.) BSP. (C. rhomboidea of Cayuga Fl.) Spring Cress. 

 Open marshland, in wet alluvial or mucky soil ; infrequent. May 10-30. 



Larch Meadow; Indian Spring marsh (D. !) ; Fall Creek, near Varna; meadow 

 n. w. of Dryden Lake; near McLean Bogs; "near Freeville and McLean" (D. !). 

 E. Mass. to Minn., southw. to Fla. and Tex.; infrequent on the Coastal Plain. 



la. C. bulbosa (Schreb.) BSP., var. purpurea (Torr.) BSP. (C. Doiiglassii of 

 Gray's Man., ed. 7.) 



In somewhat drier and more alluvial woodlands than the preceding; frequent, 

 locally very abundant. Apr. 20-May 15. 



Around swamp w. of Key Hill ; Inlet Valley, both s. and n. of Ithaca, abundant ; 

 Caroline Depot; Beech Woods, Six Mile Creek; Fall Creek; Ellis Hollow; along Fall 

 Creek, above Freeville ; and elsewhere. 



Conn, to s. Ont. and Wis., southw. to Md. and Ky. ; rare or absent on the Coastal 

 Plain. 



No good characters have been found to separate this from the other form of 

 C. bulbosa. The often-cited differences in shape of leaf are not apparent, and there 

 is no constant difference in shape and size of flower, though the flowers of C. bulbosa 

 are occasionally smaller. The differences in color of flower, pubescence, height, and 

 time of flowering, are those of degree only, and one or more are frequently not evi- 

 dent. Perhaps color of flower and height are the most constant. 



2. C. pratensis L., var. palustris Wimm. & Grab. (See Fernald in Rhodora 



22: 11. 1920.) Cuckoo Flower. 



Boggy and mucky soil, usually in the vicinity of limy springs ; scarce. May 15- 

 June 10. 



Larch Meadow (D.) ; Fleming Meadow (D.) ; marsh at head of Cayuga Lake 

 (Dr. Jordan, D.) ; Dryden-Lansing Swamp (Dr. Jordan, D.) ; near Freeville (D.) ; 

 Mud Pond, McLean Bogs (£>.!) ; Beaver Brook; swale by railroad w. of Mallory- 

 ville; Lake Como (Locke Pond, D.) ; swamp e. of Montezuma village, and on How- 

 land Island (F. P. Metcalf) ; Miller Bog, Spring Lake (L. Griscom). 



Lab. to the n. w. coast, southw. to n. N. J. and Minn. ; rare or absent on the Atlan- 

 tic Coastal Plain. Found also in Eurasia. 



Fernald states that this variety has white flowers, as opposed to pink in the typical 

 form of the species. Several of the specimens listed above have flowers strongly 

 purple-tinged. 



3. C. pennsylvanica Muhl. (C. hirsnta of Cayuga Fl.) 



Wet places along streams and in swamps ; common. May-July. 



Lab. to Minn, and Mont., southw. to Fla. and Kans., including the Coastal Plain. 



4. C. parviflora L. (C. hirsuta, var. sylvatica, of Cayuga Fl.) 



Dry, apparently noncalcareous, mostly sandstone, residual soil on rocks ; rare. June. 

 Esty (Burdick's) Glen and vicinity (D.), and on the cliffs s. of the glen (K.M.W.). 

 Que. to Ga., and from the Mississippi Valley to Oreg. ; rare or absent on the Atlan- 

 tic Coastal Plain. 



21. Arabis L. 

 o. Seeds in one row. 



b. Seeds oblong or elliptical, very small, wingless. 

 c. Leaves tapering at base, often petioled, those of the basal rosette usually 

 pubescent and coarsely toothed or lyrately pinnatifid, the cauline leaves 

 entire; stem low, diffusely branched above. 1. A. lyrata 



c. Leaves clasping, glabrous and glaucous, entire ; stem tall and strict. 



2. A. glabra 



