Chlamydospermae

Japanese: Chlamydospermae
Chlamydospermae

…It is classified as a member of the Gnetum class (Ephedra) along with the closely related Ephedra and Welwitschia. This species has a perianth, which completely encloses the ovule in female flowers, forming a structure similar to an ovary, and has vessels in the wood, which is a unique form for gymnosperms. It is sometimes separated and independent from gymnosperms as primitive angiosperms (Protoangiospermae) or chlamydospermae (Chlamydospermae), and treated as an intermediate plant between angiosperms and gymnosperms. G. gnemon L., found in India and Malaysia, is the species most closely related to humans, and is a tree about 2.5 to 20 meters tall. …

*Some of the terminology that mentions "Chlamydospermae" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…近縁のマオウ,ウェルウィッチアとともにグネツム綱(マオウ綱)として分類される。この類は花に花被があり,雌花ではこの花被が完全に胚珠を包み,子房に似た構造を呈し,材には道管があり,裸子植物としては特異な形態を示すので,原始被子植物Protoangiospermaeまたは衣子植物Chlamydospermaeとして裸子植物から分離・独立させ,被子植物との中間型植物として扱われることもある。 インド,マレーシアに分布するグネツム・グネモンG.gnemon L.が最も人間とのかかわりが深い種で,高さ2.5mから20mほどの樹木である。…

※「Chlamydospermae」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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