[Taxacom] The cashew - nut or drupe?

Marcela Martínez Millán marmm at comcast.net
Mon Jan 28 22:34:48 CST 2008

I almost forgot. The fruits are anatomically described here, the authors 
even have an "Anacardium-type endocarp":
Wannan, B. S. and C. J. Quinn. 1990. Pericarp structure and generic 
affinities in the Anacardiaceae. Botanical Journal of the Linnean Society 
102: 225-252.

Marcela Martínez Millán

----- Original Message ----- 
From: "Marcela Martínez Millán" <marmm at comcast.net>
To: <john.steel at botany.otago.ac.nz>
Sent: Monday, January 28, 2008 8:06 PM
Subject: Re: [Taxacom] The cashew - nut or drupe?

> As far as I know it is a drupe.
> In drupes the endocarp would be the woody while mesocarp would be somewhat 
> fleshy. In nuts, the endocarp, mesocarp and exocarp would be all fused, 
> indistinguishable from one another and woody. The best taxonomic reference 
> would be:
> Mitchell, J. D. & S. A. Mori. 1987. The cashew and its relatives 
> (Anacardium: Anacardiaceae). Mem. New York Bot. Gard. 42: 1-76.
> Unfortunately this paper is not in pdf. But this one is:
> Mitchell, J. D. 1992. Additions to Anacardium (Anacardiaceae). Anacardium 
> amapaense, a New Species from French Guiana and Eastern Amazonian Brazil. 
> Brittonia, Vol. 44, No. 3 (Jul. - Sep., 1992), 331-338.
> In that paper, the fruit is clearly refered to as a drupe.
> The Missouri Botanical Garden Glossary of botanical terms has good 
> definitions of drupe and nut: 
> http://www.mobot.org/mobot/research/APweb/top/glossarya_h.html
> Hope this helps.. let me know if you need the pdf of the cited paper.
> Marcela
> ----- Original Message ----- 
> From: <john.steel at botany.otago.ac.nz>
> To: <taxacom at mailman.nhm.ku.edu>
> Sent: Monday, January 28, 2008 7:27 PM
> Subject: [Taxacom] The cashew - nut or drupe?
>> Does anyone know of a paper giving an accurate description of the 'nut' 
>> part
>> (not the aril) of the cashew (Anacardium occidentale)?  I need to 
>> determine whether it
>> should be a drupe or a nut (in the sense of a dry, indehiscent, woody, 
>> single seeded,
>> syncarpous fruit).
>> A more daring request is for the earliest, published definition of nut!
>> Thanks for your tolerance,  John Steel.
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