There are several forms of this beautiful Oxalis. I have four that are distinctly different. All are characterized by tall stems clothed with clusters of hairy leaves, the flowers emerging from the erect stems. The stems are usually rigid and often branch, reaching a height of up to 12" (30cm) in the species I grow. The one to the left is the shortest, only about 8' (20cm) in height. I do not have a subspecies or varietal name for this one, so it is listed on the web site simply as Oxalis hirta. It is extremely floriferous, the 
flowers often completely hiding the foliage when it is in bloom.
Oxalis hirta 'Gothenburg' is seen to the right. It grows about 12" (30cm), and has lovely lilac flowers with a distinct white eye.
I list another Oxalis hirta as O. hirta Lavender Form. It is tall, and has distinctly lavender flowers and grey leaves. The bulbs are very large, up to 6cm in diameter. Here it is to the left.
A real beauty is Oxalis hirta v. tubiflora. I have mentioned this before as O. hirta v. longituba, since it came to me with this name, but I realize now that name is not valid. It is tall also, and very floriferous. 
The pink flowers have a very long tube, as can be seen in the photograph to the right. The bulbs are huge, 5-7cm in diameter, and increase slowly, so I have not been able to list it so far. Salter says that as you go north in the Cape Province, the tube of the corolla of O. hirta increases in length, so this must come from the northern regions.
Occasionally I read that Oxalis hirta is a trailing species, and should be grown in a hanging basket, but from the species I grow, all of which have rigid stems, I think this means they are not being grown in bright enough light, which will make them weak stemmed. All are beautiful plants, with very attractive foliage and form, in addition to their lovely flowers.
www.telosrarebulbs.com
