Leptolepis

Japanese: Leptolejeunea

…It is the family with the largest number of genera and species among all the mosses, with about 80 genera and 1,500 species known worldwide, and about 25 genera and 100 species recorded in Japan. It generally grows on tree trunks, but there are also foliar mosses, such as Cololejeunea and Leptolejeunea , that grow on the leaves of ferns and evergreen trees. The plant body is generally very small and creeps closely to the substrate. …

From [Moss on leaves]

…They develop in warm and humid regions, and many species have diversified in the tropics, but they are also quite common in lowland valleys in southern Japan. There are few mosses or hornworts among leaf mosses, and most are liverworts, especially in the genus Cololejeunea (of the family Cololejeunea), the genus Leptolejeunea (of the family Leptolejeunea), and the genus Radula (of the family Leptolejeunea). These leaf mosses are generally adapted to the special environment of leaves, such as having a very small plant body, a short period before they become reproductive, a bag-like structure that stores water in parts of the leaf, well-developed suction organs that allow them to attach to smooth surfaces, and the production of disk-shaped gemmae that are stable on a flat surface. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…苔類の科の中で属および種の数が最大で，世界では約80属1500種が知られ，日本では約25属100種が記録されている。一般に樹幹に着生するが，ヒメクサリゴケ属Cololejeuneaやカビゴケ属Leptolejeuneaのように，シダや常緑樹の葉上に生育する葉上苔（ようじようごけ）もある。植物体は一般にごく小さく，基物に密着してはう。…

【葉上苔】より

…温暖で湿潤な地域に発達し，熱帯では多種に分化しているが，日本の南部でも低地の谷間などにかなり多い。葉上苔には蘚（せん）類やツノゴケ類は少なく，大部分が苔（たい）類で，特にクサリゴケ科のヒメクサリゴケ属Cololejeunea，カビゴケ属Leptolejeunea，ケビラゴケ科のケビラゴケ属Radulaなどに多い。これらの葉上苔は一般に，植物体が微小である，生殖可能になるまでの期間が短い，葉の一部が水を蓄える袋状の構造をつくる，平滑な表面に付着するための吸着器官が発達している，平面で安定しやすい円盤状の無性芽をつくるなど，葉上という特殊な環境に対する適応を遂げている。…

※「Leptolejeunea」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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