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 Mammillaria melanocentra

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wiebe
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jr. member


Number of posts : 90
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Location : The Netherlands
Registration date : 2008-09-18

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PostSubject: Mammillaria melanocentra   Mammillaria melanocentra Icon_minitimeMon Apr 09, 2012 9:29 am

Both of the plants illustated below are labelled M. melanocentra. First one, without collection data, is in my opinion 'typical' for M melanocentra with its spination and flower colour. The second one, GM 849 (Rep 249) is not typical with a flower colour that is different from the typical colour. Flower colour does fit with the description of the ssp. linaresensis but spination does not. Any thoughts on these?

Wiebe

Mammillaria melanocentra Dsc2019m

Mammillaria melanocentra Dsc2067c
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jfabiao

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Number of posts : 412
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Location : Lisbon, Portugal
Registration date : 2010-05-25

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PostSubject: Re: Mammillaria melanocentra   Mammillaria melanocentra Icon_minitimeMon Apr 09, 2012 9:53 am

I would say the second plant is some form of M. heyderii, but what do I know...
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maurillio



Number of posts : 2614
Age : 65
Location : Modena - Italia
Registration date : 2009-12-20

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PostSubject: Re: Mammillaria melanocentra   Mammillaria melanocentra Icon_minitimeMon Apr 09, 2012 7:20 pm

some different flowers in m.melanocentra

mammillaria melanocentra BZ 59
from huasteca canyon - nuevo leon

Mammillaria melanocentra 3640-210

Mammillaria melanocentra 2219-210


mammillaria melanocentra var.rosea REP 1218a
los muertos - nuevo leon

Mammillaria melanocentra 3160-210

mammillaria melanocentra Z 30
from huasteca canyon - nuevo leon

Mammillaria melanocentra Melano11





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woltertenhoeve



Number of posts : 270
Registration date : 2009-10-01

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PostSubject: Re: Mammillaria melanocentra   Mammillaria melanocentra Icon_minitimeTue Apr 10, 2012 8:40 pm

In the Reppenhagen field list Rep 249 is listed as M. dioica, so there must be something wrong with the number of Wiebe's white-flowering plant.
In the loose-leaf collection of the AfM, Thomas Linzen states that around Grutas de Garcia one can find melanocentra plants with cream-yellow flowers.

Wolter ten Hoeve.
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Robby

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Location : Stuttgart, Germany
Registration date : 2010-04-25

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PostSubject: Re: Mammillaria melanocentra   Mammillaria melanocentra Icon_minitimeFri Apr 13, 2012 12:42 pm

REPPENHAGEN had his own classification of the genius Mammillaria. In his system every taxon has a number (no fieldnumber). In his book of 1987 we find under number 249 M.lloydii. Later in 'Die Gattung Mammillaria' of 1991 number 249 is M.melanocentra and lloydii becomes No. 254.
I think this clarify the problem with this number. The plant of Wiebe might be M.lloydii sensu Reppenhagen.
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