The Flora of the Cayuga Lake Basin 241 



9. R. sativum Syme. (See Bailey, Man. Cult. PI., p. 335. 1924. R. vulgar e of 



Gray's Man., ed. 7. R. rubrum of Cayuga Fl.) Red Currant. 



Mostly in low open woods, but also in dry places ; scarce. May. 



South Hill (£).) ; Fall Creek woods near C. U. campus; near Indian Spring (£).) ; 

 low woods, Mud Creek, Freeville; mossy thicket, border of McLean Bogs. In the 

 dry-soil stations the plant appears to have escaped directly from cultivation ; but in 

 the boggy places it seems to constitute part of a general introduction into low ground 

 throughout eastern N. A., and is apparently spontaneous. 



Mass. to Wis., southw. to Va. ; also in Oreg. and B. C. Native of Eu. 



10. R. triste Pall., var. albinervium (Michx.) Fernald. (R. rubrum, var. sub- 

 glandulosum, of Cayuga Fl.) Wild Red Currant. 



Deep boggy woods, probably in calcareous regions only ; frequent. May 10-30. 



N. of Cayuta Lake (D.) ; Michigan Hollow Swamp (D. !) ; s. of Caroline Depot; 

 Ellis Hollow Swamp (D.\) ; Dryden-Lansing Swamp (Dr. Jordan, D.) ; Ringwood; 

 Freeville ; Mud Creek, Freeville ; near Mud Pond, McLean Bogs ; Beaver Brook 

 (D. !) ; w. of East Genoa; and elsewhere. 



Newf. to Alaska, southw. to N. S., N. H., N. Y., Mich., and Wis. 



63. HAMAMELIDACEAE (Witch-hazel Family) 

 1. Hamamelis L. 

 1. H. virginiana L. Witch-hazel. 



Dry woods and ravine banks, in gravelly, nearly neutral, soils ; common. Oct- 

 Nov. Fruit ripening the next season. 



Generally distributed throughout the basin, except in the more calcareous soils and 

 the heavy clays. 



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



Apparently two forms occur : one with sulphur-yellow, the other with deep 

 yellow, flowers, the latter flowering much the later, chiefly in November. 



64. PLATANACEAE (Plane Tree Family) 

 1. Platanus (Tourn.) L. 

 1. P. occidentalis L. Sycamore. Buttonwood. 



Bottom lands, in alluvial and lacustrine, gravelly and sandy, subacid and alkaline, 

 but not in boggy, soils ; frequent. June. 



Along most of the larger streams of the basin. The first-growth trees were often 

 of large size, and were perhaps the largest trees of this region. 



S. Me., n. Vt., and Ont., to Minn., southw. to Fla., Tex., and Kans., including 

 the Coastal Plain. 



65. ROSACEAE (Rose Family) 



Artificial Key to the Genera 



a. Ovary inferior; carpels 2-5, each 1-5-seeded, fused in the axis of the receptacle; 

 fruit fleshy; plants woody. 

 b. Mature carpels papery or leathery, 2-ovuled; leaves usually not incised. 

 c. Cells of the ovary as many as the styles ; flowers in umbels or corymbs, white 

 or pink. 

 d. Inflorescence umbellate-racemose; flowers large (more than 2 cm. in diam., 

 rarely less in exotics) ; fruit usually large (20 mm. in diam. or more) ; 

 leaves simple. 

 e. Styles free to the ovary; hypanthium (or disk) generally constricted 

 above the ovary ; flesh of the fruit usually containing grit cells. 



6. Pyrus 



