Biennial plants

South African annual or biennial plants having flowers that open only in bright sunlight .

南非一个一年或二年生植物属，其花只在明亮阳光下开放。

All annual and biennial plants are monocarpic .

所有一年生及二年生植物都是结果一次而后死去。

Bolting Premature flowering and seed production . Biennial plants will sometimes bolt in their first year ; this seriously reduces their yield .

抽苔：提前开花或产生种子。两年生的植物有时会在第一年抽苔，这会导致产量严重下降。

Foliage plants ; ( 4 ) Woody plants and ( 5 ) Annual & biennial plants , ( 6 ) Bonsai , and ( 7 ) Fruit plants . Species , flower color , ornamental features were recorded .

按照花卉分类法，对球根花卉、肉质花卉、观叶植物、木本花卉、一年和二年生花卉、盆景植物和观果植物等7大类群植物的主要种类及其观赏特点进行了详细叙述。

The dissecting observation on diseased annual and biennial plants of largehead atractylodes rhizome determined that the symptoms of rhizome rot on this plant included three different types : dry rot , wet rot and caudex rot.

在一年生和二年生白术的不同发育阶段，对病株根茎进行解剖观察，明确了根腐病有干腐型、湿腐型、基腐型3种主要症状类型。

The change of diversity of the dominant annual and biennial herbaceous plants and xerophytes affects not only the community diversity , but also affects significantly the stability and ecological functions of steppe communities and ecosystems .

优势种一、二年生草本和旱生植物多样性的变化不仅影响到群落多样性的变化，而且对草场群落及其生态系统的稳定和生态功能的发挥具有重要影响。

The main results are as follows : ( 1 ) The investigated total wild seed plants in this area are 38 families , 18 genera , 30 species , in which contains 9 grasses , 6 compositae and most of which are annual , biennial and perennial herbaceous plants .

主要研究结果如下：（1）图们江下游地区湿地土壤种子库共有38种植物，隶属于18科30属。其中禾本科9种，菊科6种，以一年生、两年生或多年生草本为主。

A biennial life cycle ; parsnips and carrots are biennial plants often grown as annuals .

二年一次的生命循环；防风草和胡萝卜是经常每年都种的二年生植物。