WA Orchid Adventures

Helms Arboretum – We did miss you !!

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25/09/2017

After a weekend of fishing we head out to Helms Arboretum (Mud Map SE35) on a long weekend Monday, to see what has changed whilst we were away on our Road Trip. First up are the usual suspects : Common bee orchids (Diuris decrementa), Cowslip orchids (Caladenia flava subsp flava), Lemon-scented sun orchid (Thelymitra antennifera), Purple enamel orchid (Elythranthera brunonis) and Esperance king spider orchid (Caladenia decora)

These guys were all found prior to our Road Trip as well, so the search now is for anything new. Well we are not disappointed, as we find a patch with many White spider orchids. Some appear to be the Rigid white spider orchid (Caladenia longicauda subsp. rigidula) as the petals and lateral sepals are stiffly spread. One had white fringe segments and the other red, same with the calli. This orchid is found between Ravensthorpe and Israelite Bay from August to early October.

Other white spider orchids were found which seem to be another species or subspecies. Some appear to be the Esperance white spider orchid (Caladenia longicauda subsp. crassa) which flowers August to early October as well, but ranges from Jerramungup to Cape Arid. The flowers are larger with broader petals and sepals.

The other appears to be the Reclining spider orchid (Caladenia cruscula) due to its short labellum and short petals and lateral sepals. This one flowers August to September and ranges between Salmon Gums and Mt Ragged. So we are a bit south of this range

With so many variables and possibilities my naming of the above orchids is quite likely incorrect, so please let me know your thoughts. However the next orchid is more recognisable. The Zebra orchid (Caladenia cairnsiana) can only be confused with the Dwarf Zebra orchid which is found in inland areas and has a incurved dorsal sepal.

Final orchids found were more Cowslip orchids in good numbers. Some pics taken then off we go to have our big catch of fish weighed.

This was our final orchid adventure of the 2017 West Australian orchid season.  I hope you have enjoyed reading about our adventures as much as we enjoyed having them. 2018 will prove a more challenging year as we move into our newly built home in April/May.  So we will be busy painting, putting up fences, laying lawn, landscaping and numerous other tasks. This will reduce the hours available for Orchid Adventures, so we will see how the new year progresses. Until then take care.

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