Solanum rostratum (Buffalobur)
Identification tips
Tip #1: Solanum is Latin for "calming down", in reference to the narcotic properties of some species, while rostratum means "beak, snout or beak". I like to associate the styleof the flower with a birdbeak, also remember that the buffalo always has a bird eating its ticks.
Plant shape
2º Identification tip: is a herbaceous plant with large lace leaves, remind quite other solanaceas and have many thorns, is a toxic plant has an alkaloid solinine.
Leaves
3º Identification tip: the leaves are alternated and laced with rounded lobes, the edges of the leaves may have hair, and the main vein has yellowish spines on both sides.
Stem
4º Identification tip: the stems are branched and covered with yellow thorns these are usually purplish at the base.
Flowers
5º Identification tip: the flowers are pentamers and yellow, have prominent reproduction structures, especially the female structure.
Fruits
6º Identification tip: the fruits are round and covered with thorns.
Seeds
7º Identification tip: the seeds are black and have a peculiar shape, reminiscent of an ocean coral. Want to identify your seed? Try here.
Seedlings - the terror of all
8º Identification tip: the cotyledonary leaves are long and thin, the first pair of true leaf is wolfed and opposite.
Extra references:
https://www.minnesotawildflowers.info/flower/buffalo-bur-nightshade
http://swbiodiversity.org/seinet/taxa/index.php?taxon=solanum%20rostratum