讨论:列当科
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![]() | 本条目有内容译自英语维基百科页面“Orobanchaceae”(原作者列于其历史记录页)。 |
碎米荠属
编辑arthur (留言) 2011年6月1日 (三) 16:01 (UTC)
arthur (留言) 2011年6月1日 (三) 16:25 (UTC)前为误译,内文已修正。
机械组织
编辑arthur (留言) 2011年6月2日 (四) 04:40 (UTC) 查找机械组织,解释多为植物的某些组织中具有厚角细胞、厚壁细胞等的组织,在逻辑上特别把例如维管束组织里再细分机械组织薄壁组织、分生组织....似乎不是那么必要。组织基本上是一群功能不同的细胞所构成,此以功能作分类我认为没有必要,机械应是功能性的描述形容词,且各种不同的细胞及组织都具有相当程度的机械功能-支持、驱动运动等功能(例如,薄壁细胞教科书常写的是储藏功能,但机械性的如膨压极大时即有机械性的支持功能)。 本文内容中所提到的机械组织是否即是指厚角细胞等,待查。
新分类群
编辑一种自1985年后就未曾被找到过、寄生于墨西哥雪香兰 (Hedyosmum mexicanum) 的植物,墨西哥南部的高山地区
A species that had not been seen since 1985 was rediscovered in the Sierra Madre del Sur in Mexico. It is an orange-brown, fleshy-stemmed parasitic plant, with a pine cone-shaped dense cluster of flowers and juicy celery-like stalks. According to George Yatskievych, the St. Louis botanist who made the recent find, the plant's formal Latin name will mean "little hermit of Mexico." He expects it will be both a new species and a new genus because "it is so unusual and distinct that it cannot be included in any of the existing genera in the plant family Orobanchaceae". It is a parasite of Hedyosmum mexicanum.[1][2][3][4]
- ^ mobot.org, ParasiticPlantRediscovery
- ^ blogs.nature.com, Parasitic hermit plant found in Mexico - May 01, 2008
- ^ ap.google.com, Scientist rediscovers rare plant unseen since 1985
- ^ Yatskievych, G., and J. L. Contreras J. 2009. A new genus of holoparasitic Orobanchaceae from Mexico. Novon 19: 266–276.
Abstract
We describe here a novel achlorophyllous parasite on the roots of Hedyosmum mexicanum C. Cordemoy (Chloranthaceae) as a new genus and species, Eremitilla mexicana Yatskievych & J. L. Contreras. The new taxon is currently thought to be endemic to the state of Guerrero, Mexico. It is best classified in the Orobanchaceae, but differs from other members of the family in having 5-ribbed, muricate ovaries containing five parietal placentae, as well as unusual stamens in which the anther is partially embedded in an expanded filament apex. Within the Orobanchaceae, the new taxon is probably related to a group that contains the other American holoparasitic genera. Morphologically, Eremitilla Yatskievych & J. L. Contreras displays a number of autapomorphies, but few identifiable synapomorphies. This presumed relictual taxon presently is known only from a restricted habitat and a very small geographic range, and thus is of conservation concern.
外部链接已修改
编辑各位维基人:
我刚刚修改了列当科中的1个外部链接,请大家仔细检查我的编辑。如果您有疑问,或者需要让机器人忽略某个链接甚至整个页面,请访问这个简单的FAQ获取更多信息。我进行了以下修改:
- 向 http://hua.huh.harvard.edu/china/mss/volume18/OROBANCHACEAE.published.pdf 中加入存档链接 http://arquivo.pt/wayback/20090714222111/http://hua.huh.harvard.edu/china/mss/volume18/OROBANCHACEAE.published.pdf
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