The Flora of the Cayi ga Lake Basin 157 



8. Arethusa (Gronov.) L. 

 1. A. bulbosa L. 



Peat bogs, 'in acid soils ; rare. May 20-Junc. 



Freeville Bog, 1874 (E. H. Palmer) and later (D.) ; Junius (Sartwell) ; Feather- 

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



Newf. to Ont. and Minn., southw. to S. C. and Ind. ; most common on the Coastal 

 Plain. 



9. Serapias L. 

 1. S. Helleborine L. 



Rich woodlands, in nearly neutral soils; scarce. July 15-Aug. 20. 



Enfield Glen (L. H. Bailey) ; Six Mile Creek, several stations (several collec- 

 tors) ; back of Sibley College (S. H. Burnliam) ; McGowan Woods (Bumham) ; 

 South Cortland, near Chicago Crossing (E. L. Overholser) ; Paine Creek; Botrychium 

 Woods, Spring Lake (L. Griscom, F. P. Metcalf, & A. II. Wright) ; woods near 

 Stark Pond (L. H. MacDaniels) ; near Westbury Bog {Griscom c"? Metcalf). 



Que. to Ont., Mass., N. Y., and Pa. ; probably adventive from Europe. 



The species was first found here in 1916 and is apparently spreading. Unlike 

 most adventive plants, it occurs usually in wild places that little suggest such intro- 

 duction. 



10. Spiranthes Richard 12 



a. Stem slender, leafless ; leaves ovate, basal, fugacious ; flowers 5 mm. long ; raceme- 

 slender, often secund. 1. S. gracilis 

 a. Stem leafy, at least toward the base ; leaves linear or lanceolate ; flowers 5-12 mm. 

 long ; raceme thicker, not secund. 

 b. Lip quadrate, yellow, obtuse, with small oblong adnate marginal callosities at the 

 base ; flowering in June ; leaves lanceolate, about 1 cm. wide. 



2. S. lucida 

 b. Lip ovate-oblong, scarcely yellow, less obtuse, callosities globular or nipple- 

 shaped and rarely wanting ; leaves linear or linear-lanceolate. 

 c. Lip unconstricted ; callosities prominent ; lateral sepals not upturned, and there- 

 fore perianth not plainly ringent ; beak of the stigma very long and slender ; 

 flowering in late summer. 3. 5". cernua 



c. Lip constricted below the apex, pandurate ; callosities minute or lacking ; lateral 

 sepals upturned and connivent with the petals and the upper sepal ; perianth 

 ringent; beak of the stigma short; flowering in midsummer. 



4. 6\ Romanzoffiana 



1. S. gracilis (Bigel.) Beck. Slender Ladies' Tresses. 



Dry sandy or gravelly banks and thickets, in neutral or slightly acid soils ; infre- 

 quent. July 15-Aug. 



Chestnut soils of the hills s. of Ithaca, stony crests of ravines, along the Cayuga 

 Lake shore, and in the sandy region n. of the lake : hilltop, North Spencer ; Thatcher 

 Pinnacles; Key Hill; Cascadilla woods (D.) ; Fall Creek woods (D.) ; Ringwood; 

 between Renwick and McKinneys; sandy woods, Junius; "frequently with pines" (D.). 



N. S. to Man., southw. to Fla., La., and Tex., including the Coastal Plain. 



2. S. lucida (H. H. Eaton) Ames. (S. latifolia of Cayuga Fl. S. plantaginea of 



authors, not Lindley.) Ladies' Tresses. 



Springy places or along stream banks and lake shores, in alluvial, sandy or gravelly, 

 neutral or more or less calcareous, soils ; frequent. May 25-July 1. 



White Church valley (D.) ; near West Danby (D.) ; Enfield Glen; Inlet Valley, 

 near Lick Brook ; upper Buttermilk Glen ; Ringwood ; McLean Bogs ; marly springy 



12 The name Spiranthes is included in the list of nomina conservanda of the International 

 Code. 



