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Anthoxanthum odoratum is a short-lived perennial grass, commonly known as sweet vernal grass, that is native to acidic grassland in Eurasia and northern Africa. [ 1 ] [ 2 ] It is grown as a lawn grass and a house plant , due to its sweet scent, and can also be found on unimproved pastures and meadows.
The seed heads are produced in a cluster of two to six spikes together at the top of the stem, each spike 2–5 cm (0.79–1.97 in) long. [ 5 ] It has a deep root system; in drought situations with penetrable soil, the root system can grow to over 2 metres (6.6 ft) deep, though most of the root mass is less than 60 centimetres (24 in) under the ...
After serving on the Smith's Parish council, DeCouto was elected to the House of Assembly at the 1972 general election, winning the Smith's North constituency for the United Bermuda Party (UBP). He was appointed Minister of Youth and Sport in 1981, under Premier David Gibbons. DeCouto was elected Deputy Speaker in 1989 and Speaker in 1993, the ...
Step 1: Water imbibition, the uptake of water, results in rupture of seed coat. Step 2: The imbibition of the seed coat results in emergence of the radicle (1) and the plumule (2); the cotyledons are unfolded (3). Step 3: This marks the final step in the germination of the seed, where the cotyledons are expanded, which are the true leaves.
Seeds can be difficult to acquire, and some plants do not produce seed at all. Some plants (like certain [4] plants modified using genetic use restriction technology) may produce seed, but not a fertile seed. [5] In certain cases, this is done to prevent the accidental spreading of these plants, for example by birds and other animals. [6]
The second oldest viable seed recorded is a 1,300-year-old sacred lotus (Nelumbo nucifera) recovered from a dry lake bed in northeastern China in 1995. [ 7 ] [ 8 ] A previously unknown species of Commiphora , possibly the source of the biblical medicinal extract tsori , was successfully germinated from a single seed in 2010 and carbon-dated to ...
The seed bank is one of the key factors for the persistence and density fluctuations of plant populations, especially for annual plants. [4] Perennial plants have vegetative propagules to facilitate forming new plants, migration into new ground, or reestablishment after being top-killed, which are analogous to seed bank in their persistence ability under disturbance.
The fast germination enables the plant to develop before the next flooding takes place. [1] After the faster first phase, the plant develops more slowly than plants that show hypogeal germination. It is possible that within the same genus one species shows epigeal germination while another species shows hypogeal germination. Some genera in ...