The Flora of the Cayuga Lake Basin 179 



2. Q. macrocarpa Michx. Bur Oak. 



Rich, chiefly low, neutral or calcareous soils; frequent. May 15-June 1. 



Summit Marsh (D.\) ; near Buttermilk Falls (U.) ; n. of Freeville (P.); 

 McLean Bogs; s. e. of Judd Falls; Renwick; on the points along Cayuga Lake, 

 becoming common at Farley Point and vicinity; common in upper Salmon Creek 

 valley and vicinity; Cayuga Marshes (D. !). 



N. S. to Man., southw. to w. Mass., Ga. (?), Tenn., and Tex. A species ol the 

 rich soils of the interior. 



3. Q. Muhlenbergii Engelm. Yellow Oak. Chestnut Oak. 

 Dry limy ledges or slopes; scarce. May 20-Junc 1. 



Library slope, C. U. campus; s. of Shurger Glen (D.) ; Salmon Creek ravine, e. of 

 Five Corners; Cayuga Lake cliffs, s. of Willets ; Big Gully (£>.!). 



Vt. to Minn., southw. to Del., Ala., and Tex.; chiefly absent in the coastal region. 



Dudley's specimens in the C. U. Herb, labeled 0. prinoides are Q. Muhlenbergii. 

 These specimens came from the station near Willets given by Dudley for Q. 

 prinoides. Since dwarf forms of the yellow oak still occur at this station, Dudley's 

 inclusion of the shrubby species in the Cayuga Flora was undoubtedly an error. 

 Moreover, 0. prinoides is a plant chiefly of the Coastal Plain, and not to be expected 

 here. 



4. Q. montana Willd. (See Rhodora 17:40. 1915. Q. Prinus of Gray's Man., ed. 



7, and of Cayuga Fl.) Chestnut Oak. 

 Dry neutral or acid, mostly rocky, soil ; locally common. May 15-30. 

 Most common on the slopes and crests of the ravines, and on the tops and slopes of 

 the higher hills in the southern part of the basin. 



S. Me. to Ont, southw. in the mts. to Ga. and Tenn. ; frequent on the Coastal Plain. 



5. Q. bicolor Willd. Swamp White Oak. 



Low or moist, chiefly alluvial, soils, apparently without lime preference; frequent. 

 May 20-June 5. 



N. of South Hill Marsh; Indian Spring marsh (D. !) ; low woods n. of Forest 

 Home ; McLean Bogs ; Beaver Brook ; on the points along Cayuga Lake, becoming 

 common near Union Springs ; near Genoa ; Cayuga Marshes. 



Me. and s. w. Que. to Ont. and Minn., southw. to Ga. and Ark. ; less frequent on 

 the Coastal Plain. 



6. Q. borealis Michx. f., var. maxima (Marsh.) Sarg. (See Rhodora 18:48. 1916. 



Q. rubra of Gray's Man., ed. 7, and of Cayuga Fl.) Red Oak. 

 Various soils, both heavy and light, neutral and acid; common. May 15-25. 

 N. S. to Ont. and Minn., southw. to Ga., Mo., and Kans. ; less frequent near the 

 coast. 



This species and Q. alba are more abundant on clay soils than are the other oaks. 



7. Q. velutina Lam. (Q. tinctoria of Cayuga Fl.)- Northern Black Oak. 



Dyer's Oak. Quercitron. 

 Light acid or neutral soils; common. May 10-25. 

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



8. Q. coccinea Muench. Scarlet Oak. 

 Light acid soils ; frequent. May 10-25. 



South Hill (D. !) ; the Narrows, Six Mile Creek (D.) ; rather common along the 

 crests of the ravines about Ithaca; near Pleasant Grove Cemetery (D.) ; Lake Ridge 

 (D.) ; near Junius ponds (D. !). 



S. Me. to Ont., Minn., and Nebr., southw. to N. C, 111., (and Mo.?) ; most common 

 eastw., and abundant on the Coastal Plain. 



This and the preceding species are good indicators of acid sandy soils. 



