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A mature female big-cone pine (Pinus coulteri) cone, the heaviest pine cone A young female cone on a Norway spruce (Picea abies) Immature male cones of Swiss pine (Pinus cembra) A conifer cone, or in formal botanical usage a strobilus, pl.: strobili, is a seed-bearing organ on gymnosperm plants, especially in conifers and cycads.
It is usually dioecious, with the male and female cones on separate trees, though occasional individuals bear cones of both sexes. The male (pollen) cones are oblong and cucumber-shaped, 4 cm ( 1 + 1 ⁄ 2 in) long at first, expanding to 8–12 cm (3– 4 + 1 ⁄ 2 in) long by 5–6 cm (2– 2 + 1 ⁄ 2 in) broad at pollen release.
They are dispersed by wind, usually using wing-like structures. On maturity, the female cones detach and fall to the ground. [2] [6] [7] Due to their size, they can cause serious injuries if they hit a person. The cones of the bunya bunya, Araucaria bidwillii, for example, weigh up to 10 kg (22 lb), [10] about the size and weight of a large ...
Two farmers resting after a morning of work Female student with áo dài and nón lá. Nón lá is a common name for many other types of hats: nón ngựa or nón Gò Găng made in Bình Định, made of lụi leaves, often used when riding a horse; nón cụ, often worn in weddings in South Vietnam; nón Ba tầm, popular in the North of Vietnam
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.
Cyclocosmia ricketti; A habitat B–D habitus of female (XUC-2013-013) E abdomen, lateral view F posterior portion of opisthosoma, ventral view, showing spinnerets G female genitalia (XUC-2013-013), dorsal view H female genitalia (tianzishan-2016), dorsal view I showing opisthosomal disc in plugging position (XUC-2013-013) J–L abdomen, caudal view (J XUC-2013-013 K Tianzishan-2016 L C-2016-001).
The main stem consists of an unbranched woody crown roughly shaped like an inverted cone. [15] The only branching in the shoot system occurs in the reproductive branches, which bear strobili. The species is dioecious, with separate male and female plants. Fertilization is carried out by insects including flies and true bugs.
The catkin like male cones are 2–5 millimetres (0.079–0.197 in) long, and shed pollen in the early spring. They are sometimes externally only slightly differentiated from the branches. The fertile bracts have 2-8 pollen sacs. [1] [2] The female 'cones' are highly reduced. [1]