The Flora of the Cayuga Lake Basin 415 



6. Leaves entire or nearly so ; chaff acutish, hirsute at apex ; pappus wanting. 



3. R. hirta 



a. Disk dull greenish yellow; stem smooth, 1.5-3 m. high; leaves lobed or parted. 



4. R. laciniata 



1. R. TRILOBA L. 



Waste places, locally abundant. June-Oct. 



City dump, lighthouse road, Ithaca, 1924 (W. C. Muenscher) . Spreading rapidly 

 and now apparently established. 



Native : N. J. to Minn., southw. to Ga., La., and Kans. Adventive northeastw. 



2. R. speciosa Wen. 



Alluvial thickets and gravelly stream banks ; rare. July. 



In the Cayuga Lake Basin, known only from Paine Creek, 1919 (K. M. IV., A. 

 J. E., & L. F. Randolph), where it is common through part of the ravine. Not 

 reported elsewhere in N. Y. State. 



N. Y. to Mo., southw. to Ga. ; apparently absent on the Coastal Plain. 



3. R. hirta L. Black-eyed Susan. 



A weed in cultivated fields and along roadsides, in gravelly soil ; frequent. 

 JulyT-Aug. 



Hilltops, North Spencer ; Caroline Pinnacles ; Enfield Glen ; Cayuga Heights ; 

 near Esty Glen ; Asbury ; and elsewhere ; most abundant in the Freeville and 

 McLean regions. 



W. N. Y. to Man., southw. to Fla., Colo., and Tex. Introduced as a weed in the 

 Eastern States. 



4. R. laciniata L. Cone-flower. 



Borders of thickets, in rich low alluvial soils ; frequent, and generally distributed. 

 July 20-Sept. 10. 



W. Me. to Man. and Idaho, southw. to Fla., Colo., and Ariz. ; rare or absent on the 

 Coastal Plain. 



Three forms occur in the Cayuga Lake Basin : (a) leaves glabrous, the upper 

 undivided leaves ovate; (b) leaves hairy, the upper undivided leaves ovate; (c) 

 leaves glabrous, much divided, the upper leaves small, lanceolate, incised-divided, 

 inconspicuous, disk corollas larger (5-5.2 mm. long), pappus deeper, achenes longer 

 (4-5 mm. long), rays more pendent. The first two forms are common, the second 

 one chiefly in the lake valley. The third form occurs only in the marl springs at Mud 

 Creek, Freeville. It has been impossible to find names for these forms, and it is not 

 possible to determine whether Linnaeus had in mind a hairy or a smooth plant. 



18. Helianthus L. 



a. Leaves sessile or nearly so, with a broad base. 1. H. divaricatus 



a. Leaves tapering to an acute base or a petiole. 



b. Leaves whitish beneath, very indistinctly toothed. 2. H. strmnosus 



b. Leaves green beneath, more plainly toothed. 



c. Heads of medium size ; disk 2 cm. in diam. or less ; perennials. 



d. Leaves thin, nearly or quite glabrous beneath; outer involucral bracts 

 longer than the disk; rays about 10-12, light yellow; rootstocks creep- 

 ing, not tuberous. 3. H. dccapctahis 

 d. Leaves thicker, scabrous above, puberulent-canescent beneath ; outer 

 involucral bracts about equaling the disk, or shorter ; rays 12-20, deep 

 yellow ; rootstocks short, tuberous-thickened at apex. 4. H. tubcrosus 

 c. Heads large ; disk 2.5 cm. in diam. or more ; annuals. \H. annuus] 



