Reversion and Crest

cactuspic · Post by **cactuspic** » Tue Feb 27, 2007 8:49 am

Many crests are not stable growth forms and have a tendency to revert towards more natural growth. This set of pictures contrasts the reversionary growth with that of the crest of an echevaria.

Hope you enjoy.

The more normal foliage of the reversion forms a rosette, but it seems narrower than the normal plant. It will be interesting to watch over time

The characteristic flat, fanshaped body of the crest

Irwin

beetleman · Post by **beetleman** » Tue Feb 27, 2007 4:44 pm

That is a very interesting crest (semi crest). Did you say a crest is some form of mutation?? I does look notheing like the regular (normal) plant growth

Ken Ramos · Post by **Ken Ramos** » Tue Feb 27, 2007 7:22 pm

The only "crest" that I know of goes on ones toothbrush

However, you did a really good job in capturing the surface textures of these plants.

DaveW · Post by **DaveW** » Wed Feb 28, 2007 7:29 am

Doug and Ken,

Monstrousity and cristation occurs in almost all plant families from time to time. They are both variations on the same theme of monstrous or abnormal growth. In monstrosity in the Cactaceae they often sprout from every areole or the ribs are randomly disrupted etc. Cristation is simply the growing point instead of producing new growth normally grows in a line like a fan. See:-

http://www.lapshin.org/science/leafy-e.htm

http://thegardenforums.org/viewtopic.ph ... w=previous

DaveW

Moebius · Post by **Moebius** » Wed Feb 28, 2007 9:42 am

Very interesting reading, Dave. Thanks for posting this.

Ken Nelson

cactuspic · Post by **cactuspic** » Wed Feb 28, 2007 9:03 pm

Thank you Ken and Doug for your commennts.

Dave, that was a great citation. I will be refering to in in my next newsletter to our local club. Thanks.

Irwin