查询词典 bract

This species is one of perfect materials to examine the developmental mechanism of plant bract, to explore the developmental relationship between leaf and bract, as well as to study the role and essential function of bract on plant reproductive biology and ecology.

该物种是研究植物苞片发育的分子机理及探讨苞片与叶片发育的相互关系的理想材料，也是探讨苞片在植物生殖生物学及生殖生态学中作用和功能的理想材料。

Pedicel bearing a bract and bracteole toward either base or apex, pubescent, puberulent, or glabrous; bracteole similar to bract but smaller.

花梗向基部或先端生苞片和小苞片，短柔毛，被微柔毛，或无毛；小苞片类似苞片但是更小。

Flowers subsessile; pedicel absent to 1(--2) mm, pubescent; bract and bracteole borne on distal part of pedicel, linear-lanceolate, proximally pubescent; bract 4--8(--11) mm, shorter than or equaling flower (sometimes a few bracts at base of raceme to 2 × flower length), apex acute.

花近无柄；花梗无到1(-2)毫米，密被短短柔毛；苞片和小苞片生于花梗上部，线状披针形，下部的短柔毛；苞片4-8(-11)毫米，短于或等长花（有时苞片在基部的总状花序达2倍花长度，先端锐尖。

Flowers subsessile to distinctly pedicellate; pedicel 0.5--6(--10) mm, pubescent or puberulent; bract and bracteole usually borne at or near apex of pedicel; bract lanceolate to narrowly so, 3--12 mm, shorter than flower (sometimes a few bracts at base of raceme to 2 × flower length), glabrous, apex acute.

花有花梗近无柄的到明显；花梗0.5-6(-10)毫米，具短柔毛或微柔毛；苞片和小苞片通常着生在花梗的先端或近先端；苞片披针形到狭披针形，3-12毫米，短于花(有时几枚苞片在总状花序基部达2倍花长度)，无毛，先端锐尖。

The basic structure of the inflorescence is the cyme (branchlets arising from the bracteole axils, the bracteoles serving as bracts for upper flowers), which can be reduced to one flower with two bracteoles and a bract. Units of dispersal vary considerably (capsules opening with lower part persistent, flower and bracteoles falling together, or cymose partial inflorescences breaking off above bract) and can be characteristic for genera. Several genera possess long trichomes serving dispersal at the base of the tepals.

花序的基本的结构是聚伞花序小枝起因于bracteole腋，散布的单位变化多样(蒴果开裂下半部分的宿存，花和小苞叶一起脱落，或部分聚伞花序在苞片以上裂开并且可以作为属的特征一些属在花被片的基部有长的毛状体用于散布Digera arvensis Forssk吗？

Bract and bracteoles or bract at calyx base forming epicalyx, persistent.

在花萼基部的苞片和小苞片或苞片形成副萼，宿存。

The reproductive development process of birch was described as follows: Male inflorescences extended from apical bud in early June. In later June, stamen primodium was differentiated in the bract of male inflorescence and the differentiation of bract was generated in female inflorescence. During July, anther layers and archesporial cell were differentiated in anther, then archesporial cell developed into mother microspore cell. Pistil primodium came into being at the same time. In early part of August the meiosis of mother microspore cell started. In later August, mono-nucleus microspore was formed. After September, both male inflorescence and female inflorescence were dormant.

白桦的生殖生长发育过程如下：6月初，雄花序从顶芽中生长出来。6月中下旬，雄花序苞片上分化出雄蕊原基，雌花序分化出苞片。7月，雄花花药分化出花药壁和孢原细胞，孢原细胞演化为小孢子母细胞，雌花序苞腋处分化出雌蕊原基；8月中上旬，小孢子母细胞减数分裂，8月下旬形成单核小孢子；9月后雄花序以单核小孢子状念越冬，雌花序以雌蕊原基状念越冬。

Reduction of ovule number as a tendency of speciation in the genus is substantiated by the occurrence of tri_ovulate cones coupled with comprehensive characters of the genus. The metamorphic patterns as well as the leaf nature of the outer envelope indicate that female cones of Ephedra are compound while the female reproductive units of the ovulate cone have been reduced from secondary reproductive shoots similar to those of cordaites by phylogenetic transformation, fusion and reduction. Each fertile bract together with its axillary female reproductive unit composed the Bract Scale and Seed Scale Complex of Ephedra .

基于返祖性畸形三胚珠球花的出现及其他形态特征，认为麻黄属胚珠数目减少是该属内物种特化的一个趋势；利用雌球花发育的畸形现象及外珠被的形态学本质提出麻黄属的雌球果为复轴性构造，雌性生殖单位是由类似于科达类的次级生殖枝构造经系统发育变态、融合、简化成现存的生胚珠构造式样，每一可育苞片及其腋内雌性生殖单位共同组成了麻黄属的苞鳞_种鳞复合体。

Inflorescences terminal or axillary, sometimes ramiflorous, unbranched, male flowers 1-3 per bract, female 1 per bract.

花序顶生或腋生，有时具枝花，不分枝，雄花每苞片1-3，雌花每苞片1。

Seed cones terminal, 1-4 together, at pollination shortly cylindric-ovoid, ca. 12 × 8 mm, later becoming ovoid or subglobose, 1.8-4.5 × 1.2-4 cm; bracts glaucous or rather glossy, broadly ovate or triangular-ovate, base with short claw 1/5-1/2 × total length of bract, distal part gradually narrowed toward pointed apex, 1/14-1/5 × total length of bract.

短在传粉，顶生的球果，1-4 一同卵球形，约×毫米，过后变得卵球形或近球形， 1.8-4.5 * 1.2-4 厘米；苞片有白霜的或相当有光泽，宽卵形的或三角状卵形，基部具短瓣爪 1/5-1/2 *苞片的总长度，对于尖的先端的上部逐渐狭窄， 1/14-1/5 *苞片的总长度。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。