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Messages - Steffen

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Citrus General Discussion / Re: Pomelo versus Grapefruit
« on: April 28, 2014, 03:00:33 PM »
Mike, here Mabberley can help.
He created a botanical naming system for Citrus, which isn't because of visual differences, he created it according to genetical differences.

Mabberley sorted Citrus because of it's genes. For many horticulturists the system is to difficult, because it creates to much confusion.
For example: Within the Citrus x aurantium group one will find the Sweet Oranges, as the Sour Oranges, but also the Grapefruit.
Mabberley found that the Pomelo - Citrus maxima - is a true species.

Citrus x aurantium is a natural hybrid of Citrus reticulata and Citrus maxima - thus Grapefruit is a natural hybrid of Mandarine with Pomelo.

Those genetical relationships were found by Hogson first published within Citrus Industry Vol. 1 - but the books still used the Tanaka systematics to classify Citrus botanically. It was also published by Albrigo and Davis in their book on Citrus.
In 1997 Mabberley published his analysis and his created botanical system of Citrus classification - and so we can find the parentages for the Grapefruit.

So I think, we won't get any closer als this information  :D

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Citrus General Discussion / Re: Pomelo versus Grapefruit
« on: April 22, 2014, 06:17:41 PM »
Well,
usually Citrus maxima trees new sprouts and main vein of the leaves are pubescent... Citrus paradisi not!

Most flowers of Citrus maxima are big and resemble as been made of wax the tip of the style is usually green, flowers of Citrus paradisi are in size of orange flowers, are fine and the tip of the style is usually yellow to light orange in color.

So, if you habe a tree, touch the leaves... let your finger move down the main vein of the leaf, feel... Citrus maxima will exhibit a touch like velvet, Citrus paradisi will not an exhibit a waxy, smooth surface of the main vein...

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Citrus General Discussion / Re: Citrus limonia "rangpur"
« on: April 21, 2014, 06:34:44 AM »
Many consider Calamondin - Citrus madurensis - as valueable ornamental citrus. But personally I think, the "Rangpur" - Citrus limonia - is much better. It tolerates being potted, tolerates alkaline soils, tolerates all time warm conditions, tolerates small pots... it has nice flowers which are purple tinged and has leaves, that smell of Lemon-Lime if carefully rubbed... Fruits are nice and look like real mandarin-limes, are very acid, stay long on the tree  and the tree can be covered in orange gems...

Why is this plant so underestimated as ornamental, as it has this outstanding beauty?

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