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Smilax sprengelii Kunth. Smilax rotundifolia, also known as roundleaf greenbrier[2] or common greenbrier, is a woody vine native to the southeastern and eastern United States and eastern Canada. [1][3][4] It is a common and conspicuous part of the natural forest ecosystems in much of its native range. The leaves are glossy green, petioled ...
Tribulus terrestris is an annual plant in the caltrop family (Zygophyllaceae) widely distributed around the world. [3] It is adapted to thrive in dry climate locations in which few other plants can survive. It is native to warm temperate and tropical regions in southern Eurasia and Africa. It has been unintentionally introduced to North America ...
Prickles on a blackberry branch. In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called spinose teeth or spinose apical processes), are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally serve the same function: physically defending plants against herbivory.
Datura stramonium, known by the common names thornapple, jimsonweed (jimson weed), or devil's trumpet, [2] is a poisonous flowering plant in the Daturae tribe of the nightshade family Solanaceae. [3] Its likely origin was in Central America , [ 2 ] [ 4 ] and it has been introduced in many world regions.
Smilax is a genus of about 300–350 species, found in the tropics and subtropics worldwide. [1] They are climbing flowering plants, many of which are woody and/or thorny, in the monocotyledon family Smilacaceae, native throughout the tropical and subtropical regions of the world. Common names include catbriers, greenbriers, prickly-ivys and ...
Solanum pleei Dunal. Solanum carolinense, the Carolina horsenettle, [2] is not a true nettle, but a member of the Solanaceae, or nightshade family. It is a perennial herbaceous plant, native to the southeastern United States, though its range has expanded throughout much of temperate North America. [3]
Amaranthus spinosus, commonly known as the spiny amaranth, [2] spiny pigweed, prickly amaranth or thorny amaranth, is a plant that is native to the tropical Americas, but is present on most continents as an introduced species and sometimes a noxious weed. [citation needed] It can be a serious weed of rice cultivation in Asia.
Pyracantha (from Greek pyr "fire" and akanthos "thorn", hence firethorn) [1] is a genus of large, thorny evergreen shrubs in the family Rosaceae, with common names firethorn or pyracantha. They are native to an area extending from Southwest Europe east to Southeast Asia. They resemble and are related to Cotoneaster, but have serrated leaf ...