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They constitute one of the major groups into which the flowering plants have traditionally been divided; the rest of the flowering plants have two cotyledons and were classified as dicotyledons, or dicots. Monocotyledons have almost always been recognized as a group, but with various taxonomic ranks and under several different names.
The spermatophytes were traditionally divided into angiosperms, or flowering plants, and gymnosperms, which includes the gnetophytes, cycads, [5] ginkgo, and conifers. Older morphological studies believed in a close relationship between the gnetophytes and the angiosperms, [ 6 ] in particular based on vessel elements .
The name comes from the Greek for "naked seed"; the egg cells are not protected by ovaries, as in flowering plants. [4] Gymnosperms are divided into 12 families of trees, shrubs and woody vines. [5] Sequoiadendron giganteum, the giant redwood, is the largest tree in the world, and Sequoia sempervirens, the coastal redwood, is the tallest. [6]
They are a group of seed producing plants, which include Coniferophyta,Ginkgophyta,Cycadophyta and Gnetophyta. Angiosperms: Flowering plants approx. 300,000 They are divided into two main classes the monocotyledons and dicotyledons, produce seeds that are protected by fruits.
An edible seed [n 1] is a seed that is suitable for human or animal consumption. Of the six major plant parts, [n 2] seeds are the dominant source of human calories and protein. [1] A wide variety of plant species provide edible seeds; most are angiosperms, while a few are gymnosperms.
5 oz (140 grams) This is the largest of all temperate (non-tropical) seeds. Poisonous. Calatola Calatola costaricensis: Metteniusaceae: 3 inches long by two inches wide. 7 cm long by 5 cm wide. [30] Provision tree, Guiana chestnut Pachira aquatica: Kapok family (Bombacaceae) Squarish seeds to 2.4 inches on a side. Squarish seeds to 6.1 cm. on a ...
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Beginning as a seedling that grows on other plants (hemiepiphyte) or rocks , F. rubiginosa matures into a tree 30 m (100 ft) high and nearly as wide with a yellow-brown buttressed trunk. The leaves are oval and glossy green and measure from 4 to 19.3 cm ( 1 + 1 ⁄ 2 – 7 + 1 ⁄ 2 in) long and 1.25 to 13.2 cm ( 1 ⁄ 2 – 5 + 1 ⁄ 4 in) wide.
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