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Summer Annual Weeds You May See–Fruit Development

Each name links to more information on identification and biology.

Click on photos to enlarge
Common purslane.
Common purslane
(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 petioles.
Hairy fleabane.
Hairy fleabane
(Conyza bonariensis): Sunflower family; summer annual; seed leaves gray-green; first leaves narrow and covered with short, soft hairs; often wrinkled or distorted.
(Conyza canadensis): Sunflower family; summer annual; seed leaves dull green, oval with fine hairs, and with short stalks that sometimes may be tinged brown-purple; first true leaves covered with hairs on upper surface and margins; undersides of early leaves smooth.
No photo available
(Echinochloa colona): Grass family; summer annual; grayish, dull-green first leaves; several purple bands on surface of leaf blade; no ligule, no auricle.
Morningglories (Ipomoea spp.)Morningglory family; summer annual; seed leaves deeply notched; heart-shaped first true leaves with deep lobes at base; stem below seed leaves maroon at base and green toward leaf tip.
Spotted spurge.
Spotted spurge
(Chamaesyce maculata): Spurge family; summer annual; seed leaves oval, tips roundish, blue-green with smooth margin; first true leaves rounded, leaf surface smooth and dull, dark green with reddish tinge.
Bearded sprangletop
(Leptochloa fasicularis): Grass family; summer annual; first leaves light green, usually with white midrib; blades somewhat rolled; sheaths loose near base of plant; ligule long, thin, membranous and tears easily.
Tall annual willowherb.
Tall annual willowherb
(Epibolium brachycarpum): Primrose family; summer annual; seed leaves small, round, often dark reddish-green; true leaves narrow, 4 to 5 times longer than wide, first true leaves opposite and smooth around edges.

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