Eastern rocket is an annual herb that can often be seen growing out from crevices in city streets. Its fruit is known to split open when ripe. This plant is considered an environmental weed in parts of Australia.

East indian jew's-mallow (Corchorus aestuans) is an annual herb that is native to India. It produces tiny yellow flowers in summer and fall.

Early hawkweed is an invasive perennial that is a variation of Hawkweed, distinguishable by its deep purple spots on its leaves. This plant is invasive when the flowers begin to fade, but if the heads are removed, it prevents self-seeding. It is deer and rabbit resistant, and ideal for rock gardens. Its Latin name (Hieracium glaucinum) references Hieracium from the Greek word meaning "hawk."

Echinochloa oryzoides is an annual herbaceous plant with upright stubble growing in dense clumps, up to 40 to 120 cm tall. The leaves are characterized by a glabrous sheath, an absent ligule, and a generally glabrous lamina, often drooping, 7 to 20 cm long and 4 to 12 mm wide.

M. minuta has a strongly variable appearance, which often leads to confusion with closely related species. In the water the plant is creeping and spreading, while on land it can appear cushion-like. It typically is perennial but sometimes appears annual. It is a tenagophyte, with the juvenile growing submerged and the adult typically terrestrial. It has a light brown to green rhizome that is 0.4–0.8 millimetres (⁄64–⁄32 in) thick with short tan hairs at the ends and internodal roots. The land leaves are on erect, terete, 5–13 centimetres (2.0–5.1 in) long petioles. The leaflets are 0.8–1.7 centimetres (⁄8–⁄8 in) by 1.2–2 centimetres (⁄2–⁄4 in), mostly glabrous, cuneate or flabellate. The leaves in water are typically not floating, but emergent from the water. Fertile leaves are produced on land with up to four sporocarps each at penduncles near the base of the petiole. It has a small sporocarp that is 2.6–4.1 millimetres (⁄64–⁄32 in) long, 2.4–3.1 millimetres (⁄32–⁄8 in) wide, and 1.3–1.7 millimetres (⁄64–⁄16 in) thick. The sporocarp has a superior tooth at the apex of the stalk and an inferior tooth at the base. The sporocarp has a conspicuous 1.5–2.2 millimetres (⁄16–⁄32 in) long raphe, about ⅔ the length of the sporocarp and semi-terete. Unlike a few Marsilea species, M. minuta sporocarps mature above ground.

Dwarf greenstripe (Pleioblastus viridistriatus) is native to Japan, where it grows best in full sun in moist, well-drained soil. It is a type of running bamboo that propagates itself through rhizomes, and it will readily spread and form large colonies. The canes of the dwarf greenstripe are purplish-green whereas the leaves are striped yellow and green.

In pop culture, poison ivy is a symbol of an obnoxious weed because, despite its unthreatening looks, it gives a highly unpleasant contact rash to the unfortunate person who touches it. Still, it is commonly eaten by many animals, and the seeds are a favorite with birds. The leaves turn bright red in fall. Its sister species, Western poison ivy (Toxicodendron rydbergii), is not considered to be invasive in the United States, but is noxious in Australia and New Zealand.

Although its berries look juicy and tempting, the fruits and the root of pokeweed are toxic and should not be eaten. Pokeweed is considered a pest species by farmers but is nevertheless often grown as an ornamental plant. Its berries can be made into pokeberry ink as well.