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Tridens flavus, known as purpletop, purpletop tridens, tall redtop, greasy grass, and grease grass, [1] [2] [3] is a large, robust perennial bunchgrass. The seeds are purple, giving the grass its common name. The seeds are also oily, leading to its other common name, "grease grass". It reproduces by seed and tillers.
Lemma is a phytomorphological term referring to a part of the spikelet. It is the lowermost of two chaff-like bracts enclosing the grass floret.The lemma often bears a long bristle called an awn, and may be similar in form to the glumes, which are chaffy bracts at the base of each spikelet.
The pointed shape of the rhizome tip gives the plant the name torpedograss. The rhizomes creep along the ground or float in water, forming floating mats. They can reach a length of 6 m (20 ft) and a soil depth of 7 m (23 ft), and they can form a mat 15 cm (5.9 in) thick.
Alloteropsis semialata, known commonly as black seed grass, cockatoo grass, donkersaad gras, swartsaadgras, tweevingergras, and isi quinti, is a perennial grass found in tropical regions of Asia, Africa, Madagascar, and Australasia.
Fruits are the mature ovary of seed-bearing plants, and they include the contents of the ovary, which can be floral parts like the receptacle, involucre, calyx, and others that are fused to it. Fruits are often used to identify plant taxa, help to place the species in the correct family, or differentiate different groups within the same family.
The grass is medium to light green in color and has a coarse texture with short upright seedhead stems that grow to about 3-5 inches. Native to Southern China, it was introduced to the United States in 1916 [1] and has since become one of the common grasses in the Southeastern United States and Hawaii. It can also be considered a weed. [2]
A tiller is a shoot that arises from the base of a grass plant. The term refers to all shoots that grow after the initial parent shoot grows from a seed. [1] [2] Tillers are segmented, each segment possessing its own two-part leaf. They are involved in vegetative propagation and, in some cases, also seed production. [3]
It is also known as timothy-grass, meadow cat's-tail or common cat's tail. [3] It is a member of the genus Phleum , consisting of about 15 species of annual and perennial grasses. It is probably named after Timothy Hanson, an American farmer and agriculturalist said to have introduced it from New England to the southern states in the early 18th ...