Search results
Results from the WOW.Com Content Network
The cone of Pinophyta (conifer clade) contains the reproductive structures. The woody cone is the female cone, which produces seeds. The male cone, which produces pollen, is usually ephemeral and much less conspicuous even at full maturity. The name "cone" derives from Greek konos (pine cone), which also gave name to the geometric cone.
Young female cone. Norway spruce is a large, fast-growing evergreen coniferous tree growing 35–55 m (115–180 ft) tall and with a trunk diameter of 1 to 1.5 m. It can grow fast when young, up to 1 m per year for the first 25 years under good conditions, but becomes slower once over 20 m (65 ft) tall. [6] The shoots are orange-brown and glabrous.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate
The cones are sexually dimorphic: the male cone is a 40 to 50 cm long cylinder that is 7 to 10 cm wide with a peduncle that is up to 2 to 3 cm long; the female cone is 25 to 50 cm long, 20 to 25 cm wide, and sessile. Males can have up to ten cones at one time and females can have up to five cones at one time. [3]
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
Cedrus atlantica foliage and mature female cone Male cones beginning to shed pollen. Fully grown, Atlas cedar is a large coniferous evergreen tree, 30 to 35 m (98 to 115 ft) (rarely 40 m) tall, with a trunk diameter of 1.5 to 2 m (4.9 to 6.6 ft).
Females usually have a much longer cone interval than males, typically 10–52 years as compared to 2.8–8.8 years. In the female cone, the central cell of the archegonium (which becomes the seed after pollination) is up to one-eighth inch (3 millimeters) in length and contains a nucleus up to one-fiftieth inch (0.5 mm) in diameter; The ...
The male flower head may be yellow or burgundy red, is cone- or egg-shaped, 8–19 cm (3.1–7.5 in) long, hardly about 1 + 1 ⁄ 4 cm (0.49 in) across, subtended by an involucre of several leaves of about 1.9 cm (0.75 in) long that are often covered in rusty-coloured soft hairs.