14 



The annexed species and varieties have been founded 

 on specimens first collected in Middlesex county. 



Rubus setosus. Biojelow, Fl. Host., 2 ed., p. 98. 



"In a swamp at Sudbury." Since reduced to a variety, Rubus 



hispidus, L., var. setosus, Torr. & Graj'. Fl. 1, 456. 

 Myrophylium tenellum. Bigelow, Fl. Bost., 2 ed., p. 346. 



"Edge of Fresh Poud, aud also at Tewksbury." 

 Utricularia resupinata. B. D. Greene in Bigelow's Fl. Bost., 



3 ed., p. 10. 

 Potamogeton gramineus, L., var, spathulaeformis, 



Robbins. 



Based upon P. spathasformis, in herb. Tuckerraan. "Mystic Pond, 



near Boston." Man., p. 487. 

 Potamogeton gramineus, L., var. maximus. Morong in 



Middlesex Fl., p. 100. 

 Potamogeton Mysticus. Morong in Bot. Gaz., Vol. V., No. 5. 

 Potamogeton pusillus, L., var. gemmiparus, Robbins. 



Based upon P. gemmiparus, in herb. Robbins. " Outlet of Mystic 



Pond, near Boston." Man., p. 489. Now restored by Morong to 



its former specific rank and name, P. gemmiparus, Robbins. 

 Naias flexilis, Rostk., var. robusta. Morong in Bot. Gaz., 



Vol. X., No. 4. 



"Concord river." 

 Juncus militaris. Bigelow, Fl. Bost., 2 ed., p. 39. 



"In a pond at Tewksbury." 

 Asplenium ebeneum, Ait., var. serratum. Gray. 



"Maiden, Nov., 1872." G. E. Davenport, iu Cat. of the Davenport 



Herb. 

 Aspidium Boottii. Tuckerman, in Hovey's Mag., Vol. IX., 



p. 145 (1843). (A. spinulosum, Swartz, var. Boottii, Man.) 



Lowell (Wm. Boott). 

 Isoetes Tuckermani, Braun. 



Mystic River and Pond, 1848 (E. Tuckerman). 

 Isoetes echinospora, Durieu, var. Boottii. Engelman in 



Man., p. 676. 



Based upon Isoetes Boottii, Braun in litt. " Pond in Woburn, near 



Boston, 1867, partly out of water." (Wm. Boott). 

 Isoetes echinospora, Durieu, var. muricata, Engelman, in 



Man., p. 676. 



" Woburn creek aud Abajona river" (Wm. Boott). 



To the above list may be added seven new species and fourteen 

 varieties of Desmids. (See p. 159). 



