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Common names include Santa-Maria, [2] Santa Maria feverfew, [3] whitetop weed, [4] and famine weed. [5] In India, it is locally known as carrot grass, congress grass [6] or gajar ghas or dhanura. [7] It is a common invasive species [8] in India, [9] Australia, and parts of Africa. [5] Pollen grains of Parthenium hysterophorus
[1] [4] The flower typically has 5 small, pointed sepals, 5 stamens, and 1 carpel. [1] These flowers can range from 1.5 to 2 cm across. [4] They can be recognized by their star-like appearance due to the separated petals or their deep violet-blue spurs. [3] [9] Pollination can occur via insects, self-pollination, or cross-pollination. [4]
Chloris is a widespread genus of monophyletic grasses belonging to the family Poaceae, known generally as windmill grass or finger grass. [3] The genus is found worldwide, but especially in the tropical and subtropical regions, and more often in the Southern Hemisphere.
Chloris virgata is a hardy grass which can grow in many types of habitat, including disturbed areas such as roadsides and railroad tracks, and cultivated farmland. It is known in some areas as a weed, for example, in alfalfa fields in the southwestern United States.
Pennisetum alopecuroides (Chinese fountain grass, Chinese pennisetum, fountain grass, swamp foxtail grass) - many cultivars [6] Pennisetum setaceum AGM & P. setaceum 'Rubrum' AGM (red fountain grass, African fountain grass, fountain grass, purple fountain grass, ruby grass) - & several other cultivars [6] Pennisetum villosum AGM (feathertop) [6]
Sporobolus virginicus, known by numerous common names including seashore dropseed, [3] marine couch, sand couch, salt couch grass, saltwater couch, coastal rat-tail grass, and nioaka, is a species of grass with a wide distribution.
Viola sororia (/ v aɪ ˈ oʊ l ə s ə ˈ r ɔːr i ə / vy-OH-lə sə-ROR-ee-ə), [5] known commonly as the common blue violet, is a short-stemmed herbaceous perennial plant native to eastern North America. It is known by a number of common names, including common meadow violet, purple violet, woolly blue violet, hooded violet, and wood ...
Nassella pulchra, basionym Stipa pulchra, is a species of grass known by the common names purple needlegrass and purple tussockgrass. [4] It is native to the U.S. state of California, where it occurs throughout the coastal hills, valleys, and mountain ranges, as well as the Sacramento Valley and parts of the Sierra Nevada foothills, and Baja California.