Centennia (Welwitschia mirabilis)
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Last Update: 2021-03-11
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Source: Internet
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Author: User
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the only species of naked plant door centennyal leaf. Also known as chiba, centennity, thousand-year-old. Located in Angola and the tropical south-east of Africa, it is found in hot and extremely arid rocky deserts, depleted riverbeds or coastal deserts.the trunk ofhundred-year-old leaves is very short and stout, inverted conical shape, rarely more than
50
cm high, and
1.2
m in diameter, with a very long and stout, deep water table main root; Blades long ribbon, with most parallel veins, up to
2
to
3.5
cm, width of about
60
cm, the leaf base can continue to grow, the top of the leaf gradually withered, often ruptured to the base and formed a number of narrow long band, its life span of more than 100 years, so there are hundred-year-old leaves. Ball flowers form the general order of complex branches, mono sex, heterogeneous plants, born in the stem top leaf depression, composed of most interactive pairs of raw, neatly arranged and tight slivers, the slivers of the armpits produced a ball flower; Fake flowers, with
6
base co-born males, in the center there is an lopd development of the embryo beads; Seeds with endosperm and exosperm, sub-leaf
2
pieces, after germination can be preserved
2
to
3
years.leaves with obvious dry structure, pores are lip-shaped, is difficult to produce in the desert dwarf woody plants, can solidify sand and soil. Secondly, the woody part, in addition to the tube cells, also has a catheter.
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