238 



FILICES. 

 Asplcnini/i Filix-fa'iniua, (Swartz) Bernh. Notre Dame du Lac. 

 Phcgopteris polypodioides, Fee. Same locality. 

 Phegopteris Dryopteris, {\..) Fee. Same locality. 

 Aspidiuin spiniilosum^ Swartz. Same locality. 

 Cystopteris bulbifera, (Swartz) Bernh. Grand FalLs. 

 Aspidium marginale, Swartz. Same locality. 

 Osmunda Claytoiiiana, L. Notre Dame du Lac. 



OPHiqULOSSACE/E. 

 BotrycJiinui Virgiiiiannin, Swartz. Notre Dame du Lac. 



LYCOPODIACE^. 



Lycopodiuni clavatum, L. Notre Dame du Lac. 

 Lycopodiuni complanatuni, L. Same locality. 

 Lycopodiuni dendroidenin, Michx. Same locality. 



Sherardia arvensis. 



So much has been said of this plant in the BULLETIN, that I 

 am moved to call attention to some facts in its life-history that 

 merit attention. I suppose in the work of most botanists' lives, 

 there is a large amount of " unfinished business," which we hope 

 to take up and consider, but which, as years roll over us, we feel 

 may never be reached. Long ago I had hoped to take up a fur- 

 ther study of Sherardia. As the time may never come, I throw 

 out what I have noted for others to build on if they feel so disposed. 



I have looked for dimorphism, common in allied genera, and 

 at one time thought I had detected it. But the pistil grows af- 

 ter the stamens have reached their final length. This explains 

 why the pistil seems sometimes equal and sometimes longer than 

 the stamens. 



The stamens have a curious fashion of recurving at the an- 

 gles of the corolla-tubes the day after the anthers mature, but 

 they assume an erect position the following day. 



The seeds are very small, but the cotyledons or seed-leaves 

 are remarkably large. I have sometimes seen them half an inch 

 in diameter. In poor soil they arc a quarter of an inch. The 

 succeeding nodes have leaves four in a whorl, and these four arc 

 also large, orbicular and alirupti}- pointed. 



