Thanks to Roy who replied here and those who replied privately. > Date: Thu, 24 Sep 2009 18:00:34 -0700 (PDT) > From: Ron Vanderhoff <rvanderhoff@sbcglobal.net> > Subject: Re: [pbs] Oxalis triangularis? papilionaceae? [snip] > Oxalis are a very confused genus taxonomically and many plants labelled > as O. triangularis are probably not. Some?are more likely the closely > related Oxalis regnellii, which also has green and red leaf forms, > sometimes even with two color shades on the same leaf. These are both > soft, acaulescent, leafy plants, with very large (for an Oxalis) > trifoliate leaflets. They form fleshy pseudobulbs. My plants have thin rhizomes, about 2 millimeters diameter, ridged with old leaf bases/scars. I wouldn't call them pseudobulbs at all. > O. triangularis is native to Brazil and possibly Argentina at rather low > elevations, with year-round moisture and in organic soils. They are a > challenge in my dry Mediterranean climate, going into stress and often > dormancy with sustained temperatures above 80F, esp. with my > low?humidity. Triangularis is?reportedly rather cold hardy, surviving > in?dormancy through winters?at temps?below freezing. That seems like my experience. The one outside under the hose made it through the January 2007 freeze fine. Leo Martin Phoenix Arizona USA