178 
Polygonum persicarioides H. B. K. Nov. Gen. and Sp. ii, 179 (1817). 
This was collected by Herbert J. Webber at Thedford in 1889, but was not found 
by the present collector. 
Polygonum hartwrightii Gray, Proc. Amer, Acad. Vili, 294 (1870), 
Two forms were found, one upright and more hairy, the other procumbent and 
rooting inthe mud, The first was collected at Swan Lake, August 7, and northeast 
of Whitman, July 29 (No, 1649); the other was found near a lake, northwest of 
Whitman, September 20 (No. 1793), 
Polygonum emersum (Mx. ) Britton, Trans. N. Y. Acad. viii, 73 (1889); Polygo- 
num amphibium emersum Mx. F). i, 240 (1803), 
More or less hairy, leaves even subcanescent beneath, upper part of the stem and 
ocrew strigose, peduncles strigose or glandular, bracts conspicuously strigose and 
ciliate. Dry Jakes in Grant County, July 29 to 31 (No. 1613). One specimen was 
found in Swan Lake, August 7, that had plainly ciliate ocreze and shorter spike, 
perhaps a hybrid with the preceding (No. 1822), 
Polygonum amphibium L. Sp. PI. i, 361 (1753), 
Isecured one specimen in Swan Lake, August 7 (No. 1653); Mr. N. P. Tulen col- 
lected several. 
Polygonum pennsylvanicum IL. Sp. Pl. i, 862 (1753), 
T refer this questionable plant to P. pennsylvanicum, whieh it resembles, although 
the flowers are smaller, the stamens 5 instead of 8, and the glands sparser and less 
stipitate. Mr. Small did not name it as he did not feel satisfied as to where it should 
be placed. Dry pond among the sand hills: Mullen July 24 (No. 1591). 
Polygonum sagittatum L, Sp. PI. i, 363 (1753). 
Common in wet meadows in Thomas Couuty: Thedford, August 19; Plummer 
Ford, August 22 (No. 1708). 
Polygonum scandens L. Sp. Pl. i, 364 (1753). 
Common along South Dismal River, August 11 (No, 1679). 
Polygonum convolvulus L, Sp. Pl. i, 364 (1753). 
Mullen, July 11 (No. 1521). 
Fagopyrum fagopyrum (L.) Karst, Deutsch. F1. 522 (1880-1883) ; Polygonum fago- 
pyrum L. Sp. Pl. i, 364 (1753). 
Escaped: Mullen, July 18; Thedford, August 26 (No. 1567). 
SANTALACE#. 
Comandra pallida A. DC. Prodr. xiv, 636 (1857). 
On the sand hills; Thedford, June 19 (No. 1363). 
EUPHORBIACES. 
Euphorbia petaloidea Engelm. Bot. Mex. Bound. 185 (1859). 
In the common form the leaves are about 2 to 3em. long and 6 mm. wide and the 
gland-appendages large. Thedford, June 20 and September 7; Dismal River, June 
27; Plummer Ford, July 3; Mullen, July 27 (No. 1372). An autumnal form has nar- 
rower and shorter leaves and smaller gland-appendages, Thedford, September 9 
(No. 1744). 
Euphorbia geyeri Engelm,; Engelm. & Gr. Bost. Journ. Nat. Hist. v, 260 (1845), 
In most of the specimens the seeds are large, in this respect and in form and color 
resembling those of EF. petaloidea. In the sand hills: Plummer Ford, July 6; Cody’s 
Lakes, August 9; Natick, September U (No, 1504). Ina few specimens the seeds 
are much smaller, and also the leaves: Thedford, September 9 (No. 1753). 
