We found these cacti in extreme southern Arizona. On the right is Coryphantha recurvata. What is that on the left?

Thanks, I'd say the clump was less then 2' across, heads are tennis ball-sized.

Whatever it is!

Looks like a terrific candidate, thanks!

Plant is a little over a foot tall, some were 2x and 3x as tall.

Here it is now, nearly three years later. It did this all on its own.

We found some unusual Chollas today at Kofa National Wildlife Refuge, and suspect C. echinocarpa × C. leptocaulis. There were a fair number of these little guys around, none more than about 0.5m tall. C. ramosissima and C. ×deserta were also found in the area. Anyone care to weigh in on this suspect...

Only one I've ever seen...

LOL It does look like a cholla, except I can't see any spines! A better pic would help.

Thanks, that was my thought as well, but I am none too sure. Here is another shot of the same plant. As you can see, it was putting on quite the show!

Here is another crest found today. Looks like this one is just getting started...

This is a habitat shot from near Ajo, AZ.

+1 on 'Blue Flame'.

From the Picacho Mountains near Florence, AZ, we found this bad boy today: http://www.agaveville.org/download/file.php?id=25906 The area is thick with C. acanthocarpa and C. fulgida, and I wonder if this might be a cross. Any opinions? Here is a bloom shot of C. fulgida. Pretty flower... http://www....

We frequently see plants of the possible "boyce-thompsonii" persuasion among mixed E. bonkerae/E. engelmannii populations. Which seems right in line with hybrid status, since they generally do look intermediate between those two species. For the record, E. bonkerae is quite common througho...