本帖最后由 Til 于 2019-7-30 19:02 编辑
本人迄今为止最长的一篇，翻译时间约两小时。 预计阅读时间1分钟。 我知道根本没人看。 但我还是要做，为的是将来的某一天，一个和我一样的菜鸟，希望从论坛获得一些与原始种有关的知识时，能有一丝的作用。 如果那时论坛还在的话。 H. decipiens- von poellnitz Karl博士 H. decipiens在Great Karoo有着广泛的分布，从Prince Albert附近向东一直到Willowmore和Steytlerville或更远。
在分布范围里，形态上有一定的变化，但总体而言，它们的特征是宽而扁的叶片，半透明的条纹和不突出的叶棱（注：keel这个词我一直不知道确切意思，手边没有资料，有知道的花友望不吝赐教）
它的毛刺基本上都在叶片边缘（很少在背面） 。叶片呈淡绿色，有些厚实，花期在春天。
典型的H. decipiens很容易与H. arachnoidea区分（包括Oudtshoorn 的H. cangoensis），因为后者有矛尖形的叶片，更多的毛刺且呈深绿色。
但是，存在例外是在意料之中的。 在另外的产地找到了许多的软叶瓦苇，长得像H. decipiens，有时被视作它的变种。
它们中的一部分可能确实与H. decipiens有关，但许多似乎与H. arachnoidea关系更近，尤其是有相对更细的叶片，叶棱上有毛刺的那种。
它们的花期与H. arachnoidea相近，叶片上有更多的毛刺，所以多半属于H. arachnoidea，但叶片上却有半透明的区域。
我自己是知道来自Prince Albert的典型的H. decipiens长什么样的，也在Beervlei大坝见过非常相似的品种。
它们经常在南向的山坡上被找到，但也在小山丘的北部或其他方向。 它们生长的产地布满石砾，一般都有灌木丛遮蔽。
向西，逐渐过渡为H. lockwoodii，而后者向南在Swartberg又过渡为H. sakai (mucronata)。
与H. sakai类似，H.decipiens生长在不同类型的产地：从铁结砾岩到石英与页岩。
2014.05.09： H. decipiens var. Swartbergensis
我在这里附上了GM之前在Swartberg山顶的fynbos（注：一种灌木）植被中发现的一种形态。
我想将它归类于H. decipiens'Swartbergensis'，因为现在它的分类学地位已经确定。
它的叶片有更多的毛刺，有突出的叶棱。
对H. decipiens的最初的描述基于产地为Prince Albert的植物。
据推测，这些植物来自Swartberg山脉下方的地区，生长在Karoo-肉质植物形成的植被中。
这些植物可能代表着一种早期的联系，这种联系最终归入H.calitzensis，而H. calitzensis最终又归入H. sakai。（注：原文inits似为in its之误）
在同一个地方还发现了另一种软叶瓦苇，可能与H. decipiens或者H. arachnoidea有联系。
2014.04.06：H.decipiens var. fortuita。
我在获得更可靠的消息以前，暂时将这种十分吸引人的瓦苇归在H.decipiens名下。
H. fortuita是GM在Bosluiskloof意外地发现的，当时他和Gerrit Visser博士正在寻找一种深色的Gasteria，它属于G. bayeri。Bosluiskloof在Swartberg北部的Gamka大坝的西侧。
这又是一种瓦苇，它使得H.decipiens和H.arachnoidea的区分更加混乱。
这种植物可能被列入H.arachnoidea种群，因为它有些类似Swartberg南边的H. jouberti（H.arachnoidea的一种），尽管它有着半透明叶片，还是归入H.arachnoidea。
它的花期在夏天，比H.arachnoidea略晚，而H.decipiens在春天。 H.decipiens的花期其实不固定，因为Prince Albert东部产地的就要晚一些，当然没有H.fortuita晚。
在Gamka大坝地区，H.decipiens逐渐过渡为H.lockwoodii。
由于H. 'fortuita'在西边被发现，人们会倾向于将它归类于H.arachnoidea，尽管它有着半透明的叶片（注：H.decipiens之特点）。
考虑到这种不确定性，H.fortuita将被作为一个独立的种并稳定其分类学名称，争议会在种群级别展开。
但我个人对此保留意见，因为这样的做法会导致越来越多的种名产生，学术界对此也有突出的反对的声音。
另一方面：如果我们将一种强制、无序的归类方法应用在瓦苇这个争议很大的属上，我们可能最终连一半的瓦苇的名字都搞不清，而余下的则只有推到搞不清真相的那一堆里去了，因为他们造成了极度的混乱、我们极力摆脱的烦恼……这有什么用呢？
[size=21.3333px]
不同的名字至少能突出自然的多样性， 有助于实现保护的目标，并为今后的交流创造一个更清晰、更稳定的环境。对我来说，后一种观点是正确的。 Prince Albert西部，下面6张图均为此地的decipiens的照片。
Kamferspoort产地。
Klipplaat西部产地。
Steytlerville产地。
Swartberg，下面两张图为此地的decipiens var. Swartbergensis的照片。
Bosluiskloof的H.decipiens var. fortuita。
[size=21.3333px]同上。
fortuita的栽培种。
原文： Haworthia decipiens - Dr Karlvon poellnitz, Haworthia decipiens has a wide distribution in the Great Karooranging from the vicinity of Prince Albert eastwards to Willowmore, Steytlerville andbeyond. There is some morphological variation in its distribution range butmostly the plants are recognized by their rather flat and broad leaves withtranslucent markings and a rather unobtrusive keel. Also the bristles or teethare mostly on the side of the leaves (avoiding or only sparsely on the back). Theleaves are light green, somewhat fleshy and the flowering time is in spring. Thetypical plants are easily distinguised from the Haworthia arachnoidea aggregate(including Haworthia cangoensis from Oudtshoorn) that have more lanceolateleaves and usually have more crowded spines and are darker green. Needless tosay that exceptions are to be expected. Numerous soft leavedarachnoidea/decipiens like plants are found over this area that are sometimesregarded as varieties or forms of decipiens. Some of these are probably relatedto Haworthia decipiens but many of these are likely closer to the Haworthiaarachnoidea aggregate, especially those that have relatively thin, lanceolateleaves and teeth on the leaf keel. These tend to flower at a similar time asHaworthia arachnoidea, have more crowded bristles on the leaves and areprobably related to the latter despite having translucent areas on the leaves. Ipersonally know the more typical plants from the Prince Albert area and have also seen verysimilar plants from Beervlei Dam. The plants from here are mostly found on thesouthern slopes of hillsides, but also on minor elevations with a northern orother inclination. They prefer a stony habitat and are normally sheltered bybushes. To the west the plants grade into Haworthia lockwoodii which in turnseems to grade southerwards over the Swartberg into Haworthia sakai (mucronata). Similar to Haworthia sakai, Haworthia decipiensgrows in more than one type of habitat - from in-between ferricrete stones toquartz and shale. 09 March 2014: I include herepictures from Gerhard Marx of a form he discovered near the top of theSwartberg in fynbos vegetation some time ago. I shall refer to this plant asHaworthia decipiens 'Swartbergensis' for now until such time as its taxonomicstatus has settled. The leaves have more hairs than the type form and are alsonotably keeled. The original description of Haworthia decipiens was based onplants from Prince Albert.It is assumed that those plant came from areas lower down below the Swartbergmountain range which grow in Karoo-succulent vegetation. The plants may perhapsrepresent an early link that eventually grades into Haworthia calitzensis whichinits turn grades into Haworthia sakai.Another soft leaved Haworthia is also found in the area that may have anassociation with Haworthia decipiens or perhaps Haworthia arachnoidea. 06 April 2014, Haworthia decipiens'fortuita'. I file this rather attractive Haworthia under decipiens for nowuntil more certainty is obtained. Haworthia decipiens 'fortuita' was accidentalydiscovered in Bosluiskloof by Gerhard Marx while he and Dr. Gerrit Visser werelooking for a dark Gasteria related to Gasteria bayeri some time ago. Bosluiskloofin situated to the west of Gamka Dam just north of the Swartberg, This is another Haworthia findthat adds to the confusion in separating Haworthia decipiens and Haworthiaarachnoidea clearly. The plant could perhaps be filed under the Arachnoideaaggregate as some analogues of Haworthia jouberti (an arachnoidea ally) dooccur on the southern side of the Swartberg, plants with translucent leavesthat seem to grade into Haworthia arachnoidea. This plant flowers in summer,a little later than the flowering time of Haworthia arachnoidea while Haworthiadecipiens flowers during spring. The flowering time of Haworthia decipiens isnot stable however as later flowering forms are found to the east of Prince Albert, but not aslate as this one. Haworthia decipiens grades into forms that start to representHaworthia lockwoodii around the Gamka Dam area. Since the Haworthia 'fortuita'is found even further to the west, one is likely to associate it more withHaworthia arachnoidea despite its leaf translucence. Considering the uncertainty,Haworthia fortuita as a separate species would stabilize its name taxonomicallyand further arguments could be done on an Aggregate level. I myself havereservations about this approach as it may well lead to a massive number ofspecies names and there is also a prominent segment in the scientific communitythat do not go along with this.On the other hand: If we do follow a forced pseudo-orderly lumpingapproach in this uncertain genus we may well end up with less than half ofHaworthia properly named and the rest shoved under the carpet because of theutter confusion they cause, an annoyance that we would rather be rid of... Whatwould be the use of that ? Many different names would at least highlight thediversity in nature, aid the goals of conservation as well as create a clearerand more stable environment for communication, now and in the future. To me thelatter argument wins. 谢谢观看。
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发表于 2019-7-30 18:53
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发表于 2019-7-30 19:00
