(Solanum nigrum): Nightshade family; summer annual or short-lived perennial;
seed leaves oval and pointed; first true leaves spade shaped with smooth edges;
lower surfaces often purple; petioles stems and leaves with some hairs.
(Solanum physalifolium=Solanum sarrachoides): Nightshade family; summer
annual; seed leaves narrow, small, and lance shaped with very short soft hairs
along edges; first true leaves with wavy edges and prominent veins.
(Chenopodium album): Goosefoot family; summer annual; seed leaves are
narrow, with nearly parallel sides; seed leaves and early true leaves dull blue
green above and often purple below; young leaves have mealy appearance from coating
of fine translucent granules.
(Chenopodium murale): Goosefoot family; summer
annual; seed leaves oblong to narrowly lance shaped, dark green;
true leaves weakly toothed, leaf surfaces, especially lower surface,
sparsely covered with tiny dotlike scales.
(Portulaca oleracea): Purslane family; summer annual;
seed leaves oblong, somewhat club shaped, succulent, maroon
on lower surface, and green or maroon on upper surface; young
leaves smooth, succulent, oblong, green on upper surface,
maroonish underneath, and broadest around leaf tip, with short
(Amaranthus retroflexus): Pigweed family; summer annual;
seed leaves long and narrow with red undersides; first true
leaves with notched tips and much broader than seed leaves.