Coi^oRADo W EED Seeds 
6 1 
Key fo Speeles 
Seeds with 2-3 flat faces 
Seeds .4-1.6 mm. in diameter 1 . .< 7 . pianiflora 
Seeds .9-1.2 mm. in diameter 2. ,C, cxwcnsifi 
Seeds usually without flat faces; seeds with a cup-like depression. . 3. .(7. inclecora 
1. Small-seeded Alfalfa Dodder, 
Lesser Clover Dodder (Cuscuta piani- 
flora Tenore., Cuscuta epithymum Murr.) 
(Fig. 109). — Seeds light yellowish-olive to 
dark olive-buff in color, .5-.7 mm. long, 
.4-.6 mm, in diameter, rough, scurfy, 
usually with three flat faces, and one 
rounded face; of the three flat faces two 
are long, meeting through their length and 
forming a ridge, the other face is short 
and at the end of the seed, cutting the 
other two faces transversely ; seeds either 
oblong, cylindrical or nearly spherical in 
shape. 
Fig. 109. Small-seeded 
Alfalfa Dodder (Cuscuta 
pianiflora). x 36. 
2. Field Dodder {Cuscuta arvensis 
Beyrich) (Fig. 110). — Seeds cinnamon- 
buff to light brownish-olive in color, 
.9-1.2 mm. in diameter, rough, usually 
with two to three flat faces and one 
rounded face as in C. pianiflora though 
mostly unequal and not always meeting 
to form a ridge, often with only one 
flat face ; seeds mostly spherical in 
shape. 
■ Fig. 110. Field Dodder (Cuscuta 
arvensis). x i:u. 
Fig. 111. Large-seed- 
id Alfalfa Dodder (Cus- 
tuta indecora), x 12. 
25. 
3. Large-seeded Alfalfa Dodder, 
Pretty Dodder {Cuscuta indecora 
Choisy) (Fig. 111). — Seeds of same 
color as C. arvensis, 1-1.7 mm. across 
each face, rough, usually with a deep 
or shallow cup-like depression on one 
side, seldom with even one flat face ; 
seeds circular in outline, compressed. 
BORAGE FAMILY 
(Boraginaceae) 
Fruit mostly of four 1-seeded nutlets, separating into two 
2-seeded or four 1-seeded nutlets ; endosperm often absent, but 
sometimes fleshy and abundant ; embryo straight or curved ; cotyle- 
dons flat or flat on one side and convex on the other. 
