Plantago Lanceolata, L.
Plantago Lanceolata, L.
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车前草，L.
DOI：
10.1086/botabull.1.11.2995165
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发表时间：
1876
期刊：
影响因子：
--
通讯作者：
N. Coleman
中科院分区：
文献类型：
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作者：
N. Coleman
在过去的几个星期里，我一直在观察一株车前草的感叹，这让我非常感兴趣。这些风格使他们看起来很好，这是这位天才的习惯，似乎对这个物种来说是安静的孤独。一段时间后，它们开始向下移动，使柱头进入花冠的管状。艾恩索尼整个风格盘绕在花冠管中，在某些初始阶段，当它恢复直立位置时，保持在那里一小时或更长时间。我当时想留心观察雄蕊的样子，但却看到了它们的样子。由于这似乎很特别，我仔细观察了花朵，想找到雄蕊或花药，因为我无法想象为什么花柱弯曲到花冠上，因为没有花药存在。但是，尽管我检查了花药，我还是没能发现任何花药的迹象：花瓣或花药，除了在A。少数初生期雄蕊的位置有一个舌状附属物，也许它可以被认为是花药的附属物，但没有发现花药的最小的符号。有些穗状花序受精很好，这并不奇怪，有些只是部分奇怪，还有一些只有一个可育的子房。这种奇特的风格行为已经运作了几个星期，从底部到钉子的顶端接连发生，因此在同一钉子上经常可以看到卷曲的花柱，在它们下面的那些已经卷曲起来但又变得笔直，在它们的上面总体上正在发展的那些。奇特的奇观。那么，是本能原则还是“自然选择”原则在这里起作用呢？因为显然，这些耻辱是在寻找哈迪不是以正常方式供应的东西之后出现的。我还看过这个物种的许多其他物种，但没有其他物种显示出如此多的变异，或者说是任何一条发展路线之外的。
PLANTAGO LANCEOLATA, L.-I have beeii watching, for somne weeks past, a plaint of comnmoni Ribwort,(Plant (ago lanceolata, L. which has interested me very muich. The styles made their appear anice, as is the habit of this genius, and seemed to be quiite lonig for the species. After a timne they begfan to benld down so that the stigfma entered the tube of the corolla. aind sooni the whole style was coiled up in the corolla tube, remaining there for a dlav or more, in some inistances, when it resumed its erect positioin. I theni com-menced to watch for the appearalnce of the stamenis, but nionie made their appearaniee. As this seemed singutlar, I made close examination of the blossoms, to find (stamenis or anthers, for I coul (d niot imagine why the styles bent dlowni inito the corolla uinless there were anthers present. But though I examinied scor-es I failed to (letect any sigfn of sta: meni or anither, except in a. few inistances a ligulate appendage was founiid in the place of the stamenl, perhaps it might be considered ap) etaloid filamenit, but niot the least sigIl of an anlther was to be found.Some of the spikes are quite well fertilized, wlhich is not strange, some onlly partially so, anid oni some there is onily onie fertile ovary. This singular behavior of the styles has been in operationi for weeks, going oni in succession from the base to the summit of the spikes, so that very frequenitly on the same spike maY be seeni the coiled styles, below them those that have beeni coiled up but have become straight again, above them those that are developinlg, makinig, on the whole. a singular spectacle. Now whlat principle of instinct, or" natural selectioni" operated here? For evidenitly the stigomas were seekinig after somethim] g that hadi not beenl supplied in the ordinary manner. I lhave wateled many other planlts of this species btut nione others have beeni fotund (i showing stuch va-riations, or any out of the tisual linle of developiuienit.