38 Rhodora [FEBRUARY 
SIX WEEKS’ BOTANIZING IN VERMONT,— III. 
NOTES ON THE PLANTS OF SWANTON AND VICINITY. 
SipxEY F. BLAKE. 
The town of Swanton, where I collected from 16 to 30 August 1911, 
lies on the eastern shore of Lake Champlain about four miles below 
the Canadian border. Its extensive deposits of glacial sands and 
gravels of varying depth overlie a base of hard blue clay, and are cut 
here and there by masses of marble forming small hills. With the 
exception of a few rarities, the plants found here were much the same 
as those of the sandy plains about Essex Junction. In the following 
list of the more interesting species collected the asterisk marks those 
not previously recorded from the state. Altitudes are given in feet. 
OsMUNDA CINNAMOMEA L. f. ıncısa (Huntington) Gilbert. Damp 
woods, Swanton, 25 August. 
O. CINNAMOMEA L. f. LATIPINNULA Blake. Edge of woods, alt. 
120, Swanton, 20 August. 
*O. REGALIS L. f. INTERRUPTA Milde, Monog. Osmund. 61 
(1868). O. regalis var. interrupta Milde, Die Höher. Sporenpfl. 
78 (1865).— Dampish ground, not long mowed, Swanton, 27 August 
(Blake 3177 part).— Fertile fronds fruiting in the middle, several 
terminal pairs of pinnae sterile and herbaceous, their pinnules often 
cut or lobed. Apparently always the result of mowing. Seen also 
from New Hampsurre: Hampton Falls, 1899, A. A. Eaton; Massa- 
CHUSETTS: Carlisle, 1882, Dame; Cambridge, 1862, Gray; Mansfield, 
1907, A. A. Eaton & C. W. Welch; Stoughton, 1908, 1911, Blake. 
L. rristacHyuM Pursh. Sandy woods, alt. 570, Fairfield. 
THUJA OCCIDENTALIS L. Observed on one occasion on plains of 
pure sand, an unusual habitat, in company with Betula populifolia, 
Myrica asplenifolia, and other plants normally of this habitat. 
SPARGANIUM AMERICANUM Nutt. Near shore of Fairfield Pond, 
Fairfield, alt. 550; the branched form. 
S. DIVERSIFOLIUM Graebn. Muddy shore of Missisquoi River, 
Swanton; damp ground, alt. 135, Swanton. 
SAGITTARIA ARIFOLIA Nutt. Sand flats, St. Albans Bay. 
S. HETEROPHYLLA Pursh f. rLUrrANsS (Engelm.) Blake. Shore of 
Maquam Bay. 
