North American Fruit Explorers mailing list at ibiblio

[Bob Randall <YearRoundGardening@comcast.net>]

I'm not sure how far north the best of the trifoliate crosses will go,  
but I have plenty of seeds of a citrus called Roundleaf (Sanford  
citrange x changsha mandarin) originally called sancichang # 10 by Dr  
Brown who made the cross.

I would guess it could be hardy to zero degrees F--perhaps more  
perhaps less.  It is sour and if you stay away from the skin which has  
some trifoliate gum cells, has a juice that is basically sour and  
edible enough.  I use it here where tasty things grow as a decoy plant  
to keep sidewalk visitors from hopping the fence and don't eat it.   
The fruit looks a bit like a Seville orange.  That is somewhat like an  
orange. I have neighbors who come back and pick it every year, so it  
is certainly decent enough.

Bob Randall
Houston

On Dec 1, 2008, at 1:38 PM, Melissa Kacalanos wrote:

> Are these things that taste like rhubarb? That's
> another plant that people use for sourness in
> imitation of tart fruit. I don't know what acids are
> in it, but I assume the stems have at least some of
> whatever poisons you're supposed to avoid in the
> leaves. I can't stand rhubarb, or sorrel either, since
> even if they taste good to my tongue, they make my
> teeth feel chalky. Give me fruit acids any day.
> There's no shortage of sour fruits.
>
> Melissa
>
> > There are multiple Rumex spp.   They all are
> > relatively high in nitrates
> > and oxalic acid.  Some unacceptably so.  Rumex
> > crispus is associated
> > with a documented fatal poisoning episode.  Rumex
> > acetosa has lower
> > levels, but it is not a food to feast upon.  Maybe
> > using it for a lemony
> > flavoring only requires a small amount....
> >
> > Betsy Hilborn
> > 7a NC
>
>
>
>
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Bob Randall, Ph.D.
713-661-9737
Co-Coordinator 2009 Fruit Tree SaleTask Force
Urban Harvest. Inc.