52 
THE PLANT WORLD. 
fessor Eaton for identification and promptly referred to I. Cana¬ 
densis. ) 
Mrs. Britton discovered on an adjoining wooded island the 
ostrich fern, Matteuccia Struthiopteris, in great profusion. 
Dr. Britton exhibited a number of specimens of viburnum twigs 
with stellate pubescence which he referred tentatively to Viburnum 
semitomentosum. 
Mr. Crawford noted Phegopteris polypodioides on canal wall 
at Broad Water. Mr. Williamson met with a large patch of 
Hibiscus militaris at this place also and Mr. Jahn other colonies 
of the Ostrich Fern. 
The recorder regretted having,to report the entire disappear¬ 
ance of Asplenium Bradleyi from its locality at the “ Slab,” as it 
is much less frequent on the York County side of the river. 
Monday, July 4, was spent working along abandoned canal, 
towpath and river to York Furnace, three miles north. 
The following report was made in the evening, Professor Brit¬ 
ton being in the chair. 
An exceedingly curious crucifer was reported from Duncan’s 
Point, evidently an introduced Brassica, about two feet high with 
large clasping upper leaves and long beaked pods. The same 
point was the most abundant station for Heuchera Curtisii, grow¬ 
ing everywhere in great profusion on exposed rocks and wall of 
canal. This species has been lost sight of for many years, but is 
now known to extend northward into New York. 
Hypericum Ascyron was more or less abundant near the river 
and this location gives it a southern extension of its cited range. 
Smilax hispida and Y puherulenta were frequent in a little 
woody clump just below the Furnace, associated with the green 
violet, Cubelium concolor, Galium concinnum, Carex Jamesii and 
C. pubescens, and in a nearby ditch Carex tribuloides Bebbii. 
This little clump of woods proved very interesting from the 
fact that a great portion of its timber was hackberry. All were 
large fine vigorous trees of which the long leaved forms of Celtis 
crassifolia and C. canina were very prominent. Hydrophyllum 
Canadense was there in good fruiting condition. 
Sida hermaphrodita still maintains its stronghold by the canal 
