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Arctostaphylos uva-ursi

Re your query about dying Arctostaphylos uva-ursi.
The comment by Nick Turland of Missouri Botanical makes me think the 
single plant purchased 20+ years ago by mail from forgotten Calif. source 
may be mis-identified.  It is Arctostaphylos but maybe not uva-ursi.  It 
is on a sunny sandy slope in arid, hot, humid USDA zone 9A (So.TX), 
definitely alkaline but don't know pH.  Receives no supplemental water 
nor fertilizer for years.  It has beome a dense thicket 4 feet tall, 
almost as wide.  Does A.uva-ursi ever get that tall?  It was a foot tall 
for years then jumped to 4 feet.  Maybe the roots go a long way (down) 
and finally reached ground water - like Mesquite.  With only 3 inches of 
rain this year it looks fine .  Here it behaves as if it is part of the 
native chaparral -- very drought tolerant.  Do you know of any changes in 
your ground water level?  Just a guess.
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