730 ADDITIONS AND CORRECTIONS. 



3. Lemna polyrhiza. Many-rooted duck-meat. 

 Roots numerous, clustered ; leaves reverse-ovate, orbicu- 

 lar, sessile, above flat, beneath convex. 



Lenticula palustris major, Dillen. in Rati Syn, 129, 2. 

 Lemna polyrhiza, Lin. S. P. 1377. 



On ditches ; annual ; July and August. 



Leaves large, fleshy, purple underneath. 



4. Lemna gibba. Bunched duck-meat. 

 Roots solitary ; leaves reverse-ovate, above flat, beneath 



hemispherical, reticulated. 



Lemna gibba, Lin. S. P. 1377. 

 Lemna minor /S, Hudson Fl. jdngl. 399. 



On ditches and stagnant waters ; annual ; June. 



P. 70. 2. Cyperus Haworthii. Haworth's cyperus. 



Culms 3-sided, in tufts, lying down ; umbels slightly 

 compound; involucnim 2-leaved; spikes linear, crowded; 

 Lractece unequal, not half as long as the culm. 



Cyperus fuscns, Hooker Flor. Land. fig. too tall and upright. 



Culm about 3 inches high, in close tufts. 



In damp fields; annual; July and August. 



P. 83. After Gastridium. 94, add 



Spathellules 2, lower with one awn at the 

 base, apex 2-cut; upper toothed Agrostis. 89. 



P. 84. After Arundo. 71, add 



Lower spatliellule bristled ; glume long ; 

 male flowers 3-stamened ; hermaph. 2-sta- 

 mened Hierochloa. 78.* 



And for Monilia. 76. read Enodium. 76. 



P. 108. 15.* Poa stricta. Stiff meadoiu-grass. 



Panicle branched; locustce Z-^ov^exeA, ovate; spathelles 

 lanceolate, 3-ribbed, nearly equal, pointed, keeled; spa- 

 thellules 5-ribbed, truncated at the tip, villous at bottom. 



Poa stricta, Don in Wern. Tr, 



In pastures. 



16. Poa strigosa, in English Harsh meadow-grass. 



19. Poa leptostachya. Smoothspiked meadow-grass. 



Panicle small, rather racemelike; pedicell very short, 

 bald ; locustse 2-flowered ; spathelles lanceolate, pointed, 

 equal, 3-ribbed, bent inwards; spathellules lanceolate, ra- 

 ther pointed. 



Poa leptostachya, Don in Wern, Tr. 



On banks of rivers. 



P. 110. Change the name of the genus monilia to eno- 

 dium, there being a genus of nematomyceae called by the 

 former name, and add 



