The Flora of the Cayuga Lake Basin 199 



d. Sepals with long herbaceous tips ; styles opposite the petals, the latter unap- 

 pendaged. 7. Agrostemma 



d. Sepals not long-tipped; styles alternate with the petals, the latter with a 

 scale at top of claw. 8. Lychnis 



c. Styles 3; calyx 10-nerved (see also 3d c). 9. Silene 



c. Styles 2; calyx obscurely nerved or 5-nerved. 



d. Calyx ovoid or cylindric, large, terete or 5-angled, obscurely nerved ; leaves 



ovate or elliptic, palmately nerved. 10. Saponaria 



d. Calyx top-shaped, small, 5-nerved; leaves linear-filiform. 11. Gypsophila 

 b. Calyx surrounded by an involucre of bracts at base ; seeds dorsally flattened ; 

 embryo nearly straight; styles 2. 12. Dianthus 



1. Spergularia J. & C. Presl. 

 1. S. alata Wiegand. (See Rhodora 22: 15. 1920.) Sand Spurry. 



Low ground, in saline situations ; very rare. July-Aug. 



Salt flats e. of Montezuma village (L. Griscom and F. P. Metcalfl) ; Salt Pond 

 w. of Howland Island (K. M'. W. & F. P. Metcalf). 



Known only from these stations. 



2. Spergula L. 



1. S. arvensis L. Corn Spurry. 



A weed of cultivated fields and waste places, in sandy or gravelly, mostly neutral, 

 soils ; infrequent. July-Aug. 



Scattered throughout the basin, but usually absent from the heavier soils. 



Newf. and N. E. to Calif., southw. to S. C. Naturalized from Eu. 



3. Sagina L. 

 1. S. procumbens L. Pearlwort. 



Damp shaded gravelly lawns ; May 25- June 20. 



Close to the east steps, Morse Hall, C. U. campus, 1918-1921, abundant over a small 

 area. 



Greenland and Newf. to Pa. and Del. ; also Ont. and Mich. Undoubtedly of recent 

 introduction at Ithaca from the coast or from Eurasia. 



4. Arenaria L. 15 



a. Leaves elliptical, blunt ; petals exceeding the blunt sepals ; ovary at first 3-celled ; 



seeds smooth, appendaged at the hilum. 1. A. lateriflora 



a. Leaves ovate, acute; petals not exceeding the acute sepals; ovary 1-celled; seeds 



papillose, not appendaged. 2. A. serpyllifolia 



1. A. lateriflora L. Sandwort. 



Dry sandy, gravelly, or stony, partly wooded, banks, in acid soils, also in the muck 

 of alder thickets and the moss of bogs ; frequent. May 20-June. 



Dry-soil localities are: "across the road from the Valley Cemetery" (D.) ; South 

 Hill, s. of the Morse Chain Works and above the railroad (D. !) ; Lockwood Flats 

 (/. /. Thomas \). Bog stations are: Fleming Meadow (D.) ; Larch Meadow (D. !) ; 

 Indian Spring marsh (D.) ; Mud Creek Swamp (D. !) ; Malloryville Bog (D. !) ; 

 Mud Pond, McLean Bogs ; Miller Bog, Spring Lake ; Duck Lake ; near Turtle Pond ; 

 arbor vitae swamp e. of Clyde. 



Arctic Am. southw. to N. J., Pa., Ohio, 111., S. Dak., and Mo., including the Atlantic 

 Coastal Plain ; also the mts. of Mont., Wash., Oreg., Colo., and N. Mex. Found also 

 in Eurasia. 



15 For reasons for maintaining Arenaria as a comprehensive genus, see Fernald, Rhodora 21 

 1919. 



