THE CAYUGA FLORA. 107 



1004. P. pusillus, L,. , var. tenuissimus, M. and K. 

 Danby, in Jennings Pond ; apparently scarce. 



1005. P. marinus, D. 



Cayuga D. near Union Springs. ("Fine specimens" in Seneca 

 D., Mr. Morong.) This species resembles P. pectinatus but is 

 smaller (usually from 10-20 cm. in length) with slenderer, lighter 

 green leaves and smaller fruits. 



1006. P. pecftinatus, L,. . (H. andC.) 

 Cayuga D. everywhere abundant, and variable. Aug. -Sept. 

 There are two remarkable forms, perhaps varieties, here, viz. : 



1007. var. ? with slender elongated stems (1-1X meters); nodes 



remote, as are the whorls of the spike, whose peduncle is usually 

 over % m. long. Leaves few and slender, plants sometimes prolif- 

 erous. Near the light-house, Cayuga D. Dr. Robbins "found no 

 parallel for this remarkable form," in his own observations. 



1008. var. ? a gigantic form growing in deep water N. 



W. and N. E. of the light-house Cayuga D. Not yet found in 

 flower or fruit, though examined more or less frequently during 

 ten years past. It is frequently proliferous, especially if detached. 

 It grows in banks, the plume-like bushy tops reaching the surface 

 of the water. The leaves and sheaths are similar to P. pectinatus, 

 except in length. Dr. Robbins remarked that he had "nothing 

 that comes near to it in length of leaves — usque ad 10V Stipules 

 are usually much shorter than in P. pectinatus. Specimens were 

 obtained in 1874 from 4-5^ meters long. This form was also no- 

 ticed by Mr. H. B. Lord, probably somewhat earlier than 1874. 



1009. P. Robbinsii, Oakes. 



Abundant in all our lakes, but not yet found in flower or fruit. 



CYPERACEiE. 



410. Cyperus, Linn. GaeingaeE. 



1010. C. diandrus, Torr. (H. and C.) 

 Dow grounds, and near streams and shores; frequent. Aug. -Sept. 



1011. C. inflexus, Muhl. 



Along the bar in Eddy Pond, Cascadilla Creek (1884); rare. Aug.- 

 Sept. 



1012. C. phymatodes, Muhl. 



Shores, also thriving in damp cultivated ground ; infrequent. 

 Aug.-Sept. 



South Hill. Dinn St., Ithaca. Cayuga D. on the damp sandy 

 points. 



10x3. C. strigosus, L. (H. and C.) 



Dow grounds ; common and variable. Aug., Sept. 

 A form is not uncommon on the brackish soil near the "Deer- 

 lick" west side of Cayuga marshes, bearing 5-flowered spikelets in 

 narrow oblong rays. (Same form in herb, from Buffalo and Salina, 

 N. Y.) 



