一いち年ねん生せい草そう本ほん

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Meanings

1

noun

annual herb

botany

Botanical term for a non-woody plant that completes its life cycle in one growing season.

一one, one radical (no.1)

年year, counter for years

生life, genuine, birth

草grass, weeds, herbs

本book, present, main

多た年ねん生せい草そう本ほん
多年生草本 is a perennial herb, living for more than two years, while 一年生草本 is an annual herb.
一いち年ねん草そう
一年草 is a more common term for an annual plant, while 一年生草本 is a technical botanical term specifically for herbaceous annuals.

Compound of 一年生 (いちねんせい, 'annual') and 草本 (そうほん, 'herbaceous plant'). The term is a direct calque from Western botanical terminology.