|
The following article was written
for the Orchid Species Bulletin published by the Orchid
Species Society, which is based in Brisbane,
Queensland in January 1996.
Bear in mind that any cultivation notes refer to the sub-tropical conditions of Southern Queensland, Australia.
Vanda
tessellata (Roxb.) G.Don can
sometimes be seen labelled under its synonym of V. roxburghii R.Br. V. tessellata is known as
the type species for the genus. Robert Brown first established the genus Vanda
in the Botanical Register in 1820 based upon V. roxburghii,
which is now known to be a later synonym. William Roxburgh had earlier described
the same species as Epidendrum tessellatum in Plants of the Coast of
Coromandel in 1795. George Don subsequently transferred it to Vanda
in Loudon’s Hortus Britannicus in 1830.
V. tessellata has stems that are 30-60 cm tall on plants
that have narrowly linear, channelled and recurved leathery leaves, which are 15-20 cm
long and 1-2 cm across. Suberect inflorescences that are 15-25 cm tall bear 6-12
sweetly scented blooms, which are 4-5 cm across. The sepals
and petals have undulating margins and are pale green, yellowish green or
somewhat bluish with tessellations or chequered lines of olive-brown on the
inner surface. The outer surface is white, while the lip is violet-purple with a
white margin, and often deeper purple towards the apex. Colour variants have
been reported that have a darker coloured bluish lip, as well as a pink-lip
colour form. The long-lasting flowers are produced in summer and last for 5-6 weeks.
V. tessellata is distributed from northeast India, Nepal,
Burma (Myanmar), southern India and Sri Lanka. It seems to be an ideal subject for
cultivation in the Brisbane area, being able to tolerate the local climatic
conditions without too much difficulty. The thick white roots like to have
plenty of air
around them so basket culture is ideal, provided high humidity can be maintained
during the warmer months of the year. Plenty of water and fertiliser can be
given during these months, with reduced amounts during winter. Low night
temperatures down to 10 oC or less seem not to be harmful if the
plant is dry at night.
|