(Cuscuta spp.): Morningglory family; summer annual; leafless or
with small scalelike triangular leaves about 1/16-inch in length;
stems slender, twining or threadlike; vary in color from pale green
to yellow or bright orange.
(Convolvulus arvensis): Morningglory family; perennial;
seed leaves nearly square, with shallow notch at tip; early
true leaves spade-shaped; petioles flattened.
(Cyperus spp.): Sedge family; perennial; first leaves inconspicuous and
grasslike; grow mainly from tubers or "nutlets"
formed on rhizomes, mostly in upper foot of soil; in cross
section, leaves V-shaped, arranged in sets of three at base,
and stems triangular.