i somehow cannot find liz's pic in the mystery bulbs
page. can someone email the exact URL?

as for hans joschko's pics, the first pic (tucuman)
is
not very clear and i can't even make out the leaves
for sure. it looks like it could be a terrestrial
orchid, Stenorrhynchus (or Spiranthes, or some other
new genus they have transferred them to, Sacoila?).
i
know these are in brazil, so perhaps they are also
in
argentina.

here's a species that occur in both countries.

it could also be a terrestrial Sinningia with that
flower arrangement. if you have a better pic with
better resolution, send it to me and i'll see if i
can
be of more help.

the 2nd pic (salta capillas) looks like a
Zephyranthes
to me. i've seen a white species in southern
brazil,
perhaps it's the same species. sorry i don't know
the
name.

tsuh yang