Siler's Pincushion Cactus, Gypsum Cactus, Gypsum Plains Cactus (Pediocactus sile

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Xenomorf Phoenix, AZ(Zone 9b) Nov 01, 2010

Siler's Pincushion Cactus, Gypsum Cactus, Gypsum Plains Cactus
Pediocactus sileri

Photo courtesy of Doug Dawson. Found south of Hwy. 89A on Clayhole Road near the Grand Canyon.

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Post #8187898
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beckstrommarc Livermore, CA(Zone 9a) Aug 19, 2012

This is NOT!!!! Sclerocactus sileri, who identifies plant photos, they need to be looked at more closely. This plant is Coryphantha vivipara.



Marc Beckstrom

Post #9247146
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Xenomorf Phoenix, AZ(Zone 9b) Aug 19, 2012

Darn right! This is an absolute Outrage! This must be remedied immediately!

Post #9247183
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Xenomorf Phoenix, AZ(Zone 9b) Aug 31, 2012

To be more exact:
Here's a link showing Escobaria/Coryphantha vivipara var. arizonica near the south rim area of the Grand Canyon.
http://www.nazflora.org/Escobaria_vivipara_arizonica.htm

Here is a scan of the distribution map of Coryphantha vivipara var. arizonica from the book by Lyman Benson "The Cacti of Arizona".

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Post #9260860
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CactusJordi El Cajon, CA Aug 31, 2012

I am sorry, but I have to contradict Marc and Xeno.
This IS a Pediocactus sileri. And the given location, Clayhole Rd.(though south of 389 and not 89 A) is absolutely right for this species!
Coryphantha vivipara doesn't have such stout spines nor such thick withered spines at the base of the plant, it has more radials radiating from the upper part of the areoles and is growing only in higher elevation.

Jordi

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Post #9261126
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Xenomorf Phoenix, AZ(Zone 9b) Sep 01, 2012

I see your point. This can be moved to the Pedio. sileri page: http://davesgarden.com/guides/pf/go/202738/

Post #9261398
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