GENUS I. DODDER FAMILY. 49 
2. Cuscuta Epithymum Murr. Thyme Dod- 
der. Lesser Lucerne or Clover Dodder. 
Fig. 3443. 
Cuscuta Epithymum Murr, in L, Syst. Ed. 13, 140. 1774. 
Cuscuta Trifolii Bab. Phytol. 1: 467. 1843. 
Stems filiform, red; flowers sessile in small dense 
clusters, pinkish, about 1” long. Calyx variable, 
4-5-lobed, more than one-half the length of the cylin- 
dric corolla-tube, the lobes acute; corolla 4-5-lobed, 
the lobes erect, about one-half as long as the tube, 
acute, its scales strongly incurved, crenulate nearly 
or quite to the base; stigmas filiform; capsule cir- 
cumscissile, capped by the withering corolla. 
Usually on clover, Maine and Ontario to South Da- 
kota and Pennsylvania. Introduced from Europe, where 
it occurs on thyme, clover and other low plants. Hail- 
weed. Hairweed, July—Sept. 
Cuscuta europaéa L., another Old World species, 
with obtuse calyx-lobes and shorter styles, is recorded 
from Maine. 
3. Cuscuta arvénsis Beyrich. Field 
Dodder. Love-vine. Fig. 3444. 
Cuscuta arvensis Beyrich; Hook. Fl. Bor. Am, 2: 
77s As synonym, 1834, 
Plant pale yellow; stems filiform, the flowers 
nearly sessile in small clusters. Calyx broad, 
5-lobed, the lobes broad, obtuse; corolla nearly 
campanulate, 5-lobed, the lobes acute or acumi- 
nate, as long as the tube, their tips reflexed, 
its scales large, ovate, as long as or longer 
than the tube, densely fringed all around with 
short irregular processes; stamens not ex- 
serted; style shorter than the ovary; stigmas 
capitate; capsule depressed-globose, indehis- 
cent, the withering corolla and usually the 
stamens persistent at its base. 
On various herbs and low shrubs, Massachusetts 
to Manitoba, Florida, Texas, Mexico and Cali- 
fornia. Also in the West Indies and South Amer- 
ica. July—Aug. 
4. Cuscuta Polygonérum Engelm. Smart- 
weed Dodder. Fig. 3445. 
Cuscuta Polygonorum Engelm. Am. Journ. Sci. 43: 
342. pl. 6. f. 26-29. 1842. 
C. chlorocarpa Engelm.; A, Gray. Man. 350. 1848. 
Plant orange-yellow; stems slender but rather 
coarse; flowers sessile or nearly so in dense clus- 
ters. Calyx short, 4-5-lobed, the lobes ovate- 
oblong, acute or acutish; lobes of the corolla 4 
or 5, triangular-ovate, acute, mostly as long as 
the tube, the scales usually obsolete, wanting, or 
consisting of only 2 or 3 slender processes on 
each side of the attached lower portion of the 
filament; filaments mostly slender; styles shorter 
than the ovary; stigmas capitate; capsule globose, 
the withering corolla persistent at its base. 
On Polygonum and other herbs, Pennsylvania and 
Delaware to Minnesota, Wisconsin and Arkansas. 
July-Sept. Has been referred to the South Amer- 
ican C. obtusifiora H.B.K. 
4 
