Journal Number 113
August 2009


ELEMENTARY ED HATCH

Thelymitra 2
Drawings by Bruce Irwin


Thelymitra x dentata
(the toothed margins of the secondary column lobes)

A natural hybrid between T longifolia and T pulchella.
Flowers pink to blue, heavily striped.
Midlobe of the column-wings tuberculate, red with yellow margins.
Lateral lobes with toothed margins and tufts of yellow-brown cilia.

Distribution - Endemic - North and South Is.

Flowers - November - December - self pollinated.

 
Thelymitra x dentata
     

Thelymitra hatchii
(for ED Hatch)

Flowers bright-blue, shading to mauve.
Column brownish, paling towards the top.
Midlobe hardly hooded, pinkish-yellow, with a minutely toothed,
truncate margin.
Lateral lobes with coarse, bright-yellow cilia.

Distribution - Endemic - North Is from the Central Plateau southwards; South Is.

Flowers - November - December - self pollinated.

 
Thelymitra hatchii
     

Thelymitra formosa
(beautiful)

Flowers blue-purple.
Column pale with a broad pinkish band near the top.
Midlobe bright-red, irregularly toothed along the upper margin.
Lateral lobes red with coarse yellow cilia

Distribution - Endemic - North Is, South Is, Chatham Is.

Flowers - November - January - self pollinated.

 
Thelymitra formosa
     

Thelymitra aff "ixioides"
(the Australian Thelymitra ixioides is insect pollinated)

Flowers blue, the petals spotted or plain
(both flower-forms often occurring in the same colony).
Column pale-blue, with a transverse violet band near the top.
Midlobe not hooded, the upper margin bright-yellow or red,
and studded with tall calli.
Lateral lobes with thin tufts of white or mauve cilia.

Distribution - Endemic - North and South Is.

Flowers - October - December - self pollinated.

 
Thelymitra aff ixioides
     
     

 

These are original outline descriptions from the late Dan Hatch.

To update readers on recent developments...

  • T. x dentata is a sterile back-cross so its mode of pollination is irrelevant.
  • T. formosa normally has an orange/brown post anther lobe, bright red only rarely.
  • Species 6, 7 & 8 open widely on hot sunny days for chance cross pollination,
    but resort to fall-back self pollination as a survival measure - Ed.

 

 

 

Previous Page

Journal Index

Next Page

Journal 113