The Flora of the Cayuga Lake Basin 153 



2. C. reginae Walt. (C spcctabile of Cayuga Fl. C. hirsutum of Gray's Man., 



ed. 7.) Showy Lady's Slipper. 



Boggy and springy places, in mucky calcareous soils ; frequent in such situations. 

 June 15-July 20. 



Headwaters Swamp; Michigan Hollow Swamp (D.) ; "scarce in Larch Meadow, 

 Buttermilk ravine, and Enfield ravine " (D.) ; Fir Tree Swamp between Slaterville 

 and Dryden; Mud Creek, Freeville (£>.!); Malloryville ; near Mud Pond, McLean 

 Bogs; Beaver Brook (D. !) ; Wyckoff Swamp (D.\) ; arbor vitae swamp e. of Clyde; 

 Tyre ; Miller Bog, Spring Lake ; Westbury Bog. " The most splendid of our native 

 orchids, this species is seen in perfection in the half shaded sphagnum openings in the 

 middle of thick swamps" (D.). 



Newf. to Minn., southw. to Ga. ; rare or absent on the Coastal Plain. 



Miller's name, C. hirsutum, cannot be identified with certainty. The description 

 suggests C. acaule. 



3. C. acaule Ait. Stemless Lady's Slipper. Moccasin Flower. 



Woods or thickets, in acid humus on sandy, gravelly, or even limy soils ; frequent. 

 June. 



On the chestnut-vaccinium soils w., s., and s. e. of Ithaca, on the ravine crests, in 

 the sandy soils n. of Cayuga Lake, and on hummocks in bogs and swamps : Connecti- 

 cut Hill ; Spencer hills ; Michigan Hollow region, with laurel and sweet fern ; Caroline 

 Pinnacles; Slaterville; Enfield Glen; Buttermilk Glen; Cascadilla woods (£>.) ; 

 Fall Creek (D. !) ; Ringwood ; Mud Creek, Freeville; Dart Woods (D.) ; Rhodes 

 Woods (D.) ; McLean Bogs; Junius Woods; near Duck Lake. 



Newf. to Minn, and Man., southw. to N. C. and Tenn. A characteristic plant on 

 the Coastal Plain. 



Wherry has recently shown (Journ. Washington Acad. Sci. 8:589. 1918) that even 

 when growing above marl the roots of acid-loving orchids are usually surrounded by 

 acid soils. 



2. Orchis (Tourn.) L. 



1. O. spectabilis L. Showy Orchis. 



Dry or well-drained woodlands and banks, in rich, somewhat calcareous or slightly 

 acid, gravelly soils ; not uncommon. May 20-June 10. 



Coy Glen ;' Six Mile Creek ; Mud Creek, Freeville ; Chicago Bog ; Howland Island ; 

 Stark Pond ; Spring Lake ; and elsewhere. " Evenly and sparingly distributed through- 

 out our Cayuga L. basin" (ZX). 



N. B. to Ont. and Dak., southw. to Ga., Ky., Mo., and Nebr. ; rare on the Coastal 

 Plain. 



3. Habenaria Willd. 10 

 a. Lip not fringed. 



b. Lip oblong, truncate, the apex with 2-3 terminal teeth or entire, 

 c. Cauline leaves 1-2 ; lip entire at base ; bracts shorter than the flowers. 



1. H. clavcllata 

 c, Cauline leaves several; bracts longer than the flowers. 

 d. Spur shorter than the lip ; lip not hastate. 2. H. bracteata 



d. Spur longer than the lip ; lip hastate, and with a median protuberance on 

 the upper side. 3. H. flava, 



var. virescens 

 b. Lip lanceolate to linear ; apex entire, and subacute or rounded. 

 c. Leaves cauline, elliptic-lanceolate or linear-lanceolate. 



d. Lip not dilated at base; flowers greenish, scarcely fragrant. 



4. H. hyperborea 

 d. Lip dilated at ba^t- ; flowers white, fragrant. 5. //. dilatata 



"'Habenaria is a well-rounded, easily recognized genus, and should be retained with its com- 

 prehensive limits. Under the International Rules this name will stand, as Habenaria Willd. and 

 Bonatea Willd. were first united under the name Habenaria. 



