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Under each microsporophyll is one or several microsporangia (pollen sacs). The female cone (megastrobilus, seed cone, or ovulate cone) contains ovules which when fertilized by pollen become seeds. The female cone structure varies more markedly between the different conifer families and is often crucial for the identification of many species of ...
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The male pollen cones may be axillary or terminal and solitary or grouped. They have glabrous peduncles. A pollen cone consists of many spirally arranged microsporophylls each with two pollen sacs producing bisaccate pollen. [1] The female seed cones develop from axillary buds. They are often solitary but may also be paired.
The short pollen cones help distinguish this species from related Agathis species. Female (seed) cones are globular, 8–13 cm across, and are borne on short woody stalks. The majority of the cone crop matures early to mid February, as the cones turn brown and release the winged seeds , which are small, flattened, and attached to a wing about 3 ...
Afrocarpus are dioecious, with male pollen cones and female seed cones borne on separate individual plants. The cones are short pedunculate and usually develop from axillary buds. [8] The male pollen cones are narrowly cylindrical and resemble catkins. They grow in small groups of two or three cones. The peduncles are glabrous.
Pollen itself is not the male gamete. [4] It is a gametophyte, something that could be considered an entire organism, which then produces the male gamete.Each pollen grain contains vegetative (non-reproductive) cells (only a single cell in most flowering plants but several in other seed plants) and a generative (reproductive) cell.
It is dioecious, with the male and female cones on different trees. The female (seed) cones are very similar to those of Taxus species, but the aril is white when mature, not red; they are 5–7 mm long and wide. The male (pollen) cones are globose, 3–4 mm diameter. It is grown as an ornamental plant in southern China and occasionally elsewhere.
It is usually monoecious with male and female cones on the same tree; the pollen cones are long and slender, up to 20 cm (8 in) long and 1 cm (3 ⁄ 8 in) broad; the seed cones are oval, up to 25 cm (10 in) long and 14–16 cm (5 + 1 ⁄ 2 – 6 + 1 ⁄ 4 in) broad.