查询词典 vascular plants

Hong Kong is near the northern limit of the distribution of tropical Asian flora and has an estimated 2800 species of vascular plants, both native and introduced.

香港位于亚洲热带植物分布区的北面边缘，本土和外来的维管系植物，估计约有2800种。

As a result of analysis to many of the results of experiment, checked up on specimens, field investigation and combining with the theories of palaeobotany, comparative morphology, evolutional morphology of vascular plants and taxonomy, it can be concluded as following: the primitive sorts of Cycadaceae are the sorts that pinnate leafs are dichotomy; among these, the sort that pinnate leafs are tripinnate-dichotomy is most primitive, from this sort gradually evolve to bipinnate-dichotomy, to only for monopinnate-dichotomy, from this sort evolve to the sorts that pinnate leafs are simply pinna; among the sorts of simply pinna, the species that segments of megasporophyll possess much more triplicate to monodichotomy are most primitive.

经过大量的实验结果分析、查阅标本和野外调查，结合古植物学、比较形态学、演化植物学和分类学等理论进行分析，认为苏铁科原始的类型为羽叶呈二歧状分叉的种类，其中最原始的又是羽叶呈三回二歧状分叉的种类，从这个羽叶类型逐渐演化出一回二歧状分叉的羽叶类型，再演化出羽叶为单羽状的类型；而单羽状叶的类群中，又以大孢子叶侧裂片具三回、二回及一回二歧状分叉数量多的种类为最原始，而侧裂片二歧状分叉数量少的为较进化，侧裂片无二歧分叉的如拳叶苏铁类为最进化的种类。

Whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs.

蕨类植物；由松叶蕨科或裸蕨纲组成；无根脉管植物，叶仅部分分化或缺乏，孢子囊发育较差。

In vascular plants, the xylem and phloem serve to translocate such substances.

维管植物的木质部和韧皮部主要进行对这类物质进行运输。

Sporophyll The sporangium-bearing structure of vascular plants.

孢子叶：是维管植物中的产生孢子囊的结构。

Lower vascular plants having dichotomously branched sporophyte divided into aerial shoot and rhizome and lacking true roots.

低等脉管植物，有二岐的孢子体，分裂为气芽和根茎。

This type of stele was present in the earliest known vascular plants, such as Rhynia.

这种中柱类型存在于象莱尼蕨这样一些著名的原始维管植物中。

Any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores.

众多无花无核有脉管的植物的任何一种，从根茎有真正的根，叶子舒展向上；由孢子繁殖。

There are two mountain ranges, more than 130 lakes and over a 1,000 different species of vascular plants.

有两个山区，130多个湖泊和超过维管束植物1000种。

Statistical analysis of floristic composition was made according to the record of 918 species of vascular plants.

在认定该局有918种维管植物的基础上，对其科、属、种的区系组成进行了统计和分析。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。