Displaying 351 - 375 out of 1575 Object(s)
| Term | Definition | |
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| Cotyledons | Seed leaves, i.e., the embryonic leaves. |
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| Cotyledons absent | A massive embryo that shows no obvious cotyledons |
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| Cotyledons absent (= embryo macropodial) | A massive embryo that shows no obvious cotyledons. |
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| Cotyledons arched | Cotyledons that are bowed in such a way that there is an air space between which is usually an adaptation for water dispersal. |
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| Cotyledons bowed | Referring to cotyledons that are arched in such a way that they form an air chamber thought to aid in dispersal, either by the wind or by water. |
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| Cotyledons carnose | Cotyledons thick and providing nutrition to the developing embryo and seedling. When the cotyledons are carnose in the Sapotaceae endosperm is usually lacking. Same as cotyledons fleshy. |
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| Cotyledons cryptocotylar | A type of seed germination in which the cotyledons remain within the seed coat at germination. Compare with phanerocotylar. |
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| Cotyledons cryptocotylar | Cotyledons that remain within the seed coat at germination. In the Lecythidaceae the seed coat is thin and fragile and breaks apart as the embryo increases in size. |
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| Cotyledons epigeal | At germination the cotyledons emerge from the seed coat above the ground. |
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| Cotyledons epigeal | At germination the cotyledons emerge from the seed coat above the ground. |
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| Cotyledons fleshy | Cotyledons very thick, not leaf-like; e.g., the cotyledons of a bean. |
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| Cotyledons fleshy, irregular (= cotyledons plano-convex) | Seed leaves (= cotyledons) that are fleshy and irregular. |
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| Cotyledons foliaceous (= cotyledons leaf-like) | Cotyledons that look like leaves but differ in their opposite instead of alternate attachment. Same as cotyledons leaf-like which is the preferred term. |
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| Cotyledons foliaceous (=cotyledons leaf-like) | Referring to cotyledons that are not carnose but instead are thin and leaf-like. In the Sapotaceae, species with foliaceous cotyledons generall have endosperm. |
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| Cotyledons hypogeal | A type of seed germination in which the cotyledons are retained below the ground. |
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| Cotyledons leaf-like | Cotyledons that look like leaves. |
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| Cotyledons leaf-like (= cotyledons foliaceous) | Cotyledons that look like leaves but differ in their opposite instead of alternate attachment. |
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| Cotyledons phanerocotylar | A type of seed germination in which the cotyledons emerge from the seed coat at germination.. |
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| Cotyledons plano-convex (= cotyledons fleshy, irregular) | Same as cotyledons fleshy. We no longer use plano-convex because the cotyledons are very irregular and are not plano-convex as in, for example, the embryo of species of Gustavia. |
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| Crassinucellate ovules | The presence of two or more cell layers between the megasporophyte and the epidermal cells in the early development of the megasporophyte which will develop into the ovule. |
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| Crassinucellate ovules | The presence of two or more cell layers between the megasporophyte and the epidermal cells in the early development of the megasporophyte. The megasporophyte develops into the embryo sac which contains the egg that, if fertilized and the conditions are right, will develop into the embryo. |
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| Crenate (diminutive = crenulate) | Referring to margins with the teeth rounded at the apex. Compare with serrate. |
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| Cretaceous Period | A geological time period that is part part of the Mesozoic Era beginning about 144 million years ago and ending about 65 million years ago. See the University of California Museum of Paleontaology at http://www.ucmp.berkeley.edu/index.php for more information. |
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| Cross-pollination | Pollination of flowers with pollen from a flower of the same species but from another plant. |
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| Cross-section | A cut at right angles to the long axis of an organ. Same as transverse section. |
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