cone bract 中文意思是什麼
cone bract
解釋
球果苞片-
In the early december, the first bract primordium was formed in the axil scale at the cone base, then bract initiation had occurred in acropetal direction
12月初，最初的苞片原基在雌球果原基的鱗片的葉腋處產生，之後其由基部向頂部連續發生。 -
Bract scale the structure found in large numbers in the female cone of gymnosperms, each bearing an ovuliferous scale in its axil
苞鱗：在裸子植物的雌球果中大量存在的結構，每個苞鱗都包含一個珠鱗。 -
For example ， the spiral arrangement of scale - bract complexes on ovule - bearing pine cones ， where the female reproductive organs of conifers are located ， is important to the production of airflow patterns that spiral over the cone ' s surfaces ， thereby passing airborne pollen from one scale to the next
例如，帶有胚珠的松球的鱗苞綜合體的螺旋狀安排，亦即松柏目植物雌性殖器官的所在位置，對于氣流模式的形成與產生殊為重要，而這些氣流模式在松球的表現盤旋上升，從而把在空氣中飛行的花粉從一個鱗苞傳播至下一個鱗苞。 -
Morphology all ephedra species from china are illustrated with great details on male and female cones. the photographs provide valuable information of characters including peduncle of cone, bract, and micropylar tube etc. for classification and identification of ephedra species from china
2 、形態學提供了中國麻黃屬種類的標本（包括模式標本）照片資料及中國麻黃屬植物的雌球花和雄球花的照片資料，為麻黃屬分類和系統學研究提供了證據。 -
In the most extreme condition in uni - ovulate cone, the female reproductive unit ( fru ) occupies the position of the terminal bud. an evolutionary trend of reduction is supported in the genus from tri - ovulate to uni - ovulate cone, in which the bract number and seed number are reduced, and the seed size and seed surface sculpture are increasing
總之，麻黃屬雌球花有簡化的趨勢，伴隨著這種趨勢，雌球博士學位論文中國麻黃屬植物的分類? ?兼論麻黃屬的演化花苞片數目減少、種子數目減少、種子體積增大、表面復雜度增加。
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