Poa

...A small weed of the grass family that is most commonly found around houses, in parks, and in farmland. In principle, it is a biennial herb that germinates in the fall, survives the winter, and blooms almost all year round, from early spring in February until fall. In cold regions, it becomes an annual plant. It is pale green overall, soft, hairless, and has thin root hairs. The stems grow in a clump, about 10 cm tall, and the leaves are found at the base and lower part of the stem, short and linear, 1 to 3 mm wide, and slightly sharply pointed at the tip. The panicles are about 7 cm long, with thread-like branches that spread out, and several spikelets are somewhat densely attached to the tip of each branch. ...

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…人家のまわり，公園，畑地等に最も普通に見られるイネ科の小型の雑草。原則として越年生の草本で，秋に発芽し，冬を越し，早春2月ころから秋までほとんど年中開花する。寒い地方では一年草となる。全体淡緑色で，軟らかく，毛がなく，細いひげ根がある。茎は叢生（そうせい）し，高さ10cmくらい，葉は根もとと茎の下部にあり，幅1～3mmの短い線形で，先はやや急にとがる。円錐花序は長さ7cmくらいで，糸状の枝を散開し，各小枝の先端にやや密に数個の小穂をつける。…

※「Poa」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