资源描述:
《槭树科Aceraceae》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、槭树科Aceraceae1-FloralformulaFlowersintheAceraceaeareusuallyimperfectandtheplantsmaybeeithermonoeciousordioecious.Thereisatrendfrominsecttowindpollination.在槭树花通常是不完善的,植物可以是雌雄同株或雌雄异株。有一个趋势,从风昆虫授粉。2-IntroductionThereareonlytwogeneraofAceraceae,andmostspeciesbelongtothegenusAcer.Thisfamilyismostcommon
2、intheNorthTemperateZone.只有两种槭树属,大多数种,属宏基。这个家庭是最常见的北温带。3-TreeAllmembersoftheAceraceaearewoodyplants,eithertreesorshrubs,withonespeciesbeingawoodyvine.ThisexampleisAcersaccharum,sugarmaple.对槭树科的所有成员都是木本植物,无论是树木或灌木,其中一名木质藤本植物。这个例子是糖槭,糖槭。4-WintertwigTheleavesareopposite,hencetheleafscarsareoppositeon
3、wintertwigs;thisexampleisAcersaccharum,sugarmaple.树叶是相反的,因此叶伤疤冬天树枝相反,这个例子是糖槭,糖槭。5-LeavesTheoppositeleavesaremostoftenpalmatelylobedandpalmatelyveined.Somespecieshavebeautifulfallcolor,asinredmaple,Acerrubrum.相反的叶子是最常见的掌状浅裂和掌状叶脉。有些品种有美丽的秋天的颜色,如红枫,红枫。6-InflorescenceThereisatrendfrominsectpollinatio
4、ntowindpollinationinthegenusAcer.ThefirstexampletobeexaminedistheNorwaymaple,Acerplatanoides,whichisinsectpollinated.Youcanseetheseflowershaveconspicuouspetals.有一个趋势,从昆虫授粉风属中的宏基授粉。第一个例子进行审查,是挪威槭树,枫树,这是昆虫授粉。你可以看到这些花有明显的花瓣。7-MaleflowerThere5sepalsand5petalsinthismaleflowerofAcerplatanoides,Norwayma
5、ple.Inthecenteroftheflowerisalargegreennectardisktoattractinsectpollinators.Notethatthereare8(eight!)stamens,acommonnumberintheAceraceae.ThereisNOrudimentarygynoecium.有5萼片和5个花瓣在这个挪威槭,挪威槭树雄花。在花卉中心是一个大型的绿色花蜜的磁盘,以吸引昆虫传粉。请注意,有8(8!)雄蕊,在槭树科共同的数目。没有起码的雌蕊。8-FemaleflowerThisfemaleflowerofAcerplatanoides,N
6、orwaymaple,has5sepals,5petals,8staminodia,alargenectardisk,andasyncarpousgynoeciumof2carpels.这是挪威槭,挪威槭树雌花,有5个萼片,花瓣5,8staminodia,大型花蜜磁盘,和2个心皮合生雌蕊。9-FemaleflowerInthislongitudinalsectionofafemaleflowerofAcerplatanoides,Norwaymaple,notethesyncarpousgynoeciumof2carpels.Theovaryhastwoprominentwings,on
7、eoneachside.在这种对挪威槭,挪威槭树,雌花纵剖面注意到2心皮合生雌蕊。卵巢有两个突出的翅膀,每一方之一。10-FruitsThefruitsofAcerareschizocarpsthatbreakapartinto2mericarps.Sinceeachmericarpiswinged,theyarealsosamaras.ThisexampleisAcerplatanoides,Norwaymaple.宏基的果实sc