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epigeal
epigeal, n. (ɛpɪˈdʒiːəl) [f. Gr. ἐπίγειο-ς: see epigee + -al1.] a. = epigeous.In mod. Dicts. b. Of cotyledons: borne above ground after germination.1861 R. Bentley Man. Bot. 773 They burst through the coats, and rise out of the ground in the form of green leaves..,in which case they are epigeal. 188...
Oxford English Dictionary
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Epigeal
Epigeal, epigean, epigeic and epigeous are biological terms describing an organism's activity above the soil surface. An epigeal nest is a term used for a termite mound, the above ground nest of a colony of termites.
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epigeous
epigeous, a. Bot. (ɛpɪˈdʒiːəs) [f. Gr. ἐπίγει-ος (f. ἐπί upon + γῆ earth) + -ous.] Of plants: Growing close upon the earth. = epigeal a. b.1835 Lindley Introd. Bot. (1848) II. 380. 1847 J. Lindley Elem. Bot. p. xxxvi/2 Epigeous, growing close upon the earth. 1866 Treas. Bot.
Oxford English Dictionary
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Epigeal germination
An example of a plant with epigeal germination is the common bean (Phaseolus vulgaris). The opposite of epigeal is hypogeal (underground germination). | Epi: Above + Geo: Earth | + Germination
Epigeal germination
Epigeal germination implies that the cotyledons are pushed above ground.
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Hypogeal
The converse, where the cotyledons expand, throw off the seed shell and become photosynthetic above the ground, is epigeal germination.
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Hypogeal germination
After the slower first phase, the plant develops faster than plants that show epigeal germination. It is possible that within the same genus one species shows hypogeal germination while another species shows epigeal germination.
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Schismatoglottis imbakensis
Epigeal stems, erect spreading, decumbent sections that tend to root along their length, modules that are pleionanthic, internodes that are 0.2-1 cm long
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Graphium samogiticum
ecology and distribution of Graphium samogiticum; the lichens it was parasitising are inhabitants of a little-studied habitat the authors call a "pioneer epigeal
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子叶
以豆科为例,若是播种发芽后下胚轴(hypocotyl)无显著的发育,而只是上胚轴(epicotyl)在生长,则会直接把胚芽顶出土表,而将子叶留在土中,因此称为地下型(hypogeal)幼苗,如豌豆;反之,发芽后若下胚轴一直生长,就会把子叶以及胚芽顶出土表,因此称为地上型(epigeal)幼苗,如大豆。
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Bhesa nitidissima
Seed germination is epigeal. Produces 3-4mm wide, greenish to white sessile flowers with 5 petals.
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Cubitermitinae
The most well known genus of this subfamily is Cubitermes, which commonly build epigeal nests with one or more caps used to shield the nest against rainfall
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Cotyledon
Epigeal versus hypogeal development
Cotyledons may be either epigeal, expanding on the germination of the seed, throwing off the seed shell, rising above Hypogeal plants have (on average) significantly larger seeds than epigeal ones.
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Arum sintenisii
Germination is epigeal.
Habitat
It grows in uncultivated Olea europaea groves at altitudes of 50 to 200 meters near Kythrea in northern Cyprus.
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Hypotermes makhamensis
It is a forest-dwelling species and the colony builds and lives inside a complex epigeal (mound) nest.
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Pterocarya stenoptera
Germination is epigeal and typically requires a little more than ten days.
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