THE CAYUGA FLORA. 77 



752. R. crispus, L. X R- obtusifolius, L- 



Specimens with the narrow leaf, nearly that of R. crispus, and 

 the valves toothed somewhat less than R. obtusifolius, occur near 

 the outlet of Dryden L-, near Reuwick, and by roadside in Danby. 



753. R. congeomeraTus, Murr. 

 Near the Marl Ponds, Cortland. 



754. R. acetoselea, L. Sheep Sorrel. (H. and C.) 

 Fields everj-where. May-Sept. 



[R. acetosa, L,., at Penn Yan, {Sartwell in Herb. andWright in C)] 

 315. POLYGONUM, Linn. 



755. P. orientals, L. Princes Feather. (H. and C.) 

 Waste ground and shores ; occasional. Aug. 



Near Six Mile Cr. , south of Ithaca ; near the Inlet. Cayuga Lake 

 shore, especially south- of Cayuga Bridge. 



756. P. Pennsylvanicum, L. (H. and C.) 

 In moist, rich soil ; common. Aug. -Oct. 



757. P. incarnatum, EH. 



Marshes and shores ; not common. July-Sept. 

 Inlet marshes, {Dr. Jordan.) ! Frequent near the foot of Cayuga 

 Lake and along its outlet. Ledyard 1827, {Herb. J. J. Thomas.) 



758. P. nodosum, Pers. 



Scarce near the shores of Cayuga Lake (where it seems indigen- 

 ous, ) at the south end, on Myers Pt. W. of Cayuga Bridge and on 

 Cayuga Marshes. Aug.-Sept. 



"Stem annual, stout, (i°-4°), mostly glabrous, often sparingly 

 and minutely glandular on the peduncles. Sheaths not fringed or 

 hairy ; style 2-cleft ; stamens 6 ; leaves narrowly lanceolate, atten- 

 uate upwards from near the base and acuminate, cuneate at the base 

 and short petioled, somewhat scabrous with short prickly hairs near 

 the midribs and margins ; spikes oblong and erect, or often linear 

 and nodding, i' long or more; flowers \' f long, white or rose ; 

 akenes ovate less than a line broad." Chiefly Rocky Mts. and Pa- 

 cific Coast. {Bot. of Cal., II., p. 13.) 



Mr. Watson writes me that it has been found along railroads in 

 Mass. sparingly. 



759. P. lapathifohum, Ait., var. incanum, Koch. 



" Borders of Cayuga L. " {"Chickering and Brewer" in Man., 

 p. 416.) Not yet rediscovered here. 



760. P. Persicaria, L. (H. and C ) 

 Common everywhere. July-Oct. 



A very smooth form prostrate and rooting occurs in exsiccated 

 places. A much branched hairy form with interrupted spikes, 

 flowers and bracts of a brighter pink than usual, grows along Can- 

 oga Marshes. 



761. P. Hydropiper, L- SmarTWEED. (q ) 

 Fields and low grounds ; common. Aug.-Sept. 



