The ray florets have female characteristics, and eventually develop to become thin brown achenes with a marginal wing utilized for wind dispersal.
Insect pollinators including bees, butterflies, and skippers help to cross-fertilize flowers to produce seeds. 20 to 30 seeds are created in each flower head. Each seed is about 9 to 15 mm long, 6–9 mm wide, flattened in shape, with a thickness of 1 mm.
Silphium perfoliatum is able to establish colonies due to its central taproot system and shallow rhizomes. A multi-rhizomed clone originating from a single seed is believed to be 15 years old. The roots found in botanical gardens have been estimated to be more than 50 years old. The plant has an extensive root system and does not transplant well except when very young.
The plant metabolises by the Type C3 Pathway. This plant is highly adapted to endure extreme weather and inhospitable conditions. For example, during the winter, the roots remain dormant and can survive down to −30 °C (−22 °F). Its optimal growing temperature is 20 °C (68 °F)20 degree Celsius. When flooded it can stay alive for 10 to 15 days.
Other articles related to "seed production, seed, production":
... The seed is dispersed from September through December ... requires a minimum of 25 years to reach commercial seed-bearing age ... Optimum seed production occurs from 40 to 125 years, and the maximum age listed for commercial seed production is 200 years ...
... Pignut hickory begins to bear seed in quantity in 30 years, with optimum production between 75 and 200 years (16) ... The maximum age for seed production is about 300 years ... Good seed crops occur every year or two with light crops in other years frost can seriously hinder seed production (22) ...
... Although the primary use of Thinopyrum intermedium is as a forage, seed production is essential because farmers and ranchers continue to establish new stands by planting seed ... In 1988 over 500 metric tons of seed were harvested in Saskatchewan alone, although more recently the harvest has fallen to less than 225 metric tons ... Average seed yields are about 330 pounds per acre, but on-farm yields of up to 880 pounds per acre have been achieved ...
Famous quotes containing the words production and/or seed:
“By bourgeoisie is meant the class of modern capitalists, owners of the means of social production and employers of wage labor. By proletariat, the class of modern wage laborers who, having no means of production of their own, are reduced to selling their labor power in order to live.”
—Friedrich Engels (18201895)
“I am present at the sowing of the seed of the world. With a geometry of sunbeams, the soul lays the foundations of nature.”
—Ralph Waldo Emerson (18031882)