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The fruit of the family Asteraceae is also so similar to an achene that it is often considered to be one, although it derives from a compound inferior ovary (with one locule). A special term for the Asteraceae fruit is cypsela (plural cypselae or cypselas). For example, the white-gray husks of a sunflower "seed" are the walls of the cypsela fruit.
Peanut seeds are contained in indehiscent legume fruit Acacia senegal fruits, in contrast, are dehiscent legume fruit Some, but not all, indehiscent fruits are included in specialized morphological categories such as achene , berry , caryopsis , cypsela , drupe , hesperidium , loment , pepo , pome , samara , syconium .
The fruit of Carex is a dry, one-seeded indehiscent achene or nut [3] which grows within the perigynium. Perigynium features aid in fruit dispersal. Perigynium features aid in fruit dispersal. [ citation needed ]
The dry, one-seeded, indehiscent fruits called cypselae are narrowly inverted egg-shaped in outline, about 2½ mm (0.1 in) and 1 mm (0.04 in) wide are dark brown in colour with two light ribs along the edge, are set with broad, very short hairs of 0.1 mm (0.004 in) long, and the surface without further sculpture or few scales. [1]
The dark brown, dry, one-seeded, indehiscent fruits called cypselae are ellips- to inverted egg-shaped, about 3 mm (0.12 in) long and 1.2 mm (0.047 in) wide, with a marginal ridge, while the surface has some weak scales and is evenly covered in 0.2 mm (0.0079 in) long hairs.
The eventually brown, dry, one-seeded, indehiscent fruits called cypselae of the fertile florets are broadly inverted egg-shaped in outline, about 4.5 mm (0.18 in) long and 3 mm (0.12 in) wide, with a pronounced ridge along the margin, with sturdy blunt hairs. The cypselae of sterile flowers are stunted and hairless.
The eventually bright brown, dry, one-seeded, indehiscent fruits called cypselae are inverted egg-shaped, about 5.5–6.0 mm (0.22–0.24 in) long and 1.5 mm (0.059 in) wide, with four or five ribs along their lengths, with shiny glands and many, 0.5 mm (0.020 in) long twin hairs on a further smooth seed skin.
The brown, dry, one-seeded, indehiscent fruits called cypselae are 3 mm (0.12 in) long and 1 1 ⁄ 2 mm (0.6 in) wide, have a light brown marginal ridge, and the more or less smooth surface carries short hairs. [3] Felicia rosulata is a diploid having nine sets of homologue chromosomes (2n=18). [3]
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