1901] Graves, — Plants of Southeastern Connecticut 63 
polars in the production of a true endosperm nucleus. In the 
orchids which he has investigated, therefore, lack of endosperm 
cannot be charged to the failure of double fertilization. 
In normally fertilized Spiranthes cernua, after fertilization, a well- 
formed nucleus of at least twice the size of a single antipodal is to 
be seen near the middle of the sac. Itis this which is pushed to the 
base of the sac by the growth of the embryo. 
In one of my preparations (by paraffine) may be seen a sac con- 
taining a very young embryo, the synergides near by, the antipodals 
in their places, and toward the centre of the sac two nuclei about 
the size of the antipodals, lying in contact, while between and 
touching both is a much smaller, deeply staining nucleus presenting 
the usual appearance of the spermatic nuclei of orchids. Here we 
have the origin of the large central nucleus clearly indicated. 
These facts lead me to suppose that in Spiranthes cernua polar 
fusion and double fertilization give rise to a true endosperm nucleus. 
Nevertheless, no endosperm in formed. The nucleus remains at the 
end of the sac where probably, by vitalizing the protoplasm around 
it, it assists in passing along nutriment to the embryo. 
(To be continued.) 
THE AMES BOTANICAL LABORATORY, 
North Easton, Massachusetts. 
NOTEWORTHY PLANTS OF SOUTHEASTERN 
CONNECTICUT,— II. 
C. B. GRAVES. 
To the observations reported in a former paper (RHODORA, i, 67) 
the following may be added as a further contribution to our knowl- 
edge of the plant life along the southern borders of New England. 
Panicum Atlanticum Nash — Franklin, Old Lyme. 
Panicum Bicknellii Nash — Lamb’s Hill in Norwich. 
Panicum Addisonii Nash — Sandy terrace near Pachaug Pond in 
Griswold. 
Panicum Eatoni Nash — Borders of ponds and marshes both fresh 
and brackish. 
Eleocharis diandra Chas. Wright — Shores of Connecticut River and 
