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Range of Paracaleana brockmanii
Range of Paracaleana brockmanii.

Brockman’s Duck Orchid
Paracaleana brockmanii Hopper & A.P.Br. 2006

Synonyms

Notes

Brockman’s Duck Orchid is one of several species of Duck Orchid endemic to south-western Australia. It is found in sandy or lateritic soils in Eucalyptus forests between Perth and Albany. As the last of WA’s Duck Orchids to flower each season, its flowers usually do not emerge until mid November, with the flowering period extending well into the summer across southern parts of its range. Due to its small size, dull colouration and forest habitat, Brockman’s Duck Orchid is extremely difficult to find, and one can be standing right next to a group of plants without noticing their presence.

While Brockman’s Duck Orchid looks similar to several other species of Duck Orchid, in particular the co-occurring Darling Range Duck Orchid (Paracaleana sp. ‘Darling Range’), it can usually be distinguished by its much later flowering period and larger flowers, with the black calli covering about one third to two fifths of the length of the labellum.

Photos

Paracaleana brockmanii
View of the flower, with the labellum pointing upwards. (Martin, WA, 11 / 11 / 2017)
Paracaleana brockmanii
Another view of the flower. (Martin, WA, 25 / 11 / 2017)
Paracaleana brockmanii
Front view of the fully opened flower. (Martin, WA, 11 / 11 / 2017)
Paracaleana brockmanii
Close-up view of the labellum, with the black calli extending across about one third… (Martin, WA, 25 / 11 / 2017)
Paracaleana brockmanii
…to two fifths of the length of the labellum. (Martin, WA, 11 / 11 / 2017)
Paracaleana brockmanii
View of the full plant in its typical habitat. (Martin, WA, 11 / 11 / 2017)
Paracaleana brockmanii
Brockman’s Duck Orchids usually grow in small colonies. (Martin, WA, 25 / 11 / 2017)
Paracaleana brockmanii
The comparison with a human thumb illustrates the small size of the flower. (Martin, WA, 11 / 11 / 2017)
Paracaleana brockmanii
Close-up view of the broad leaf which is usually withered by the time the flowers emerge. (Martin, WA, 03 / 11 / 2017)
Paracaleana brockmanii
View of the habitat of Brockman’s Duck Orchid on the Darling Scarp near Perth. (Martin, WA, 11 / 11 / 2017)

References