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Black Bootlace Orchid (Erythrorchis cassythoides) |
This weird-looking specimen is a Black Bootlace Orchid found on the Toowoomba Field Naturalist Club's August outing to the Merritts Creek area.
This is a climbing orchid that grows on eucalypts, stumps and logs in near-coastal areas and nearby tablelands from central Queensland to southern coastal NSW.
It’s a plant with no leaves at all. Its black bootlace-like stems come up from roots which are getting all the food the plant needs by being parasitic on soil fungi.
It was first formally described by Richard Cunningham who sent a specimen and hand-written description to his brother Allan. He wrote that he had called the plant Dendrobium cassythoides, because on first impression it resembled the genus Cassytha, not only beings leafless and having short racemes of flowers, but in its peculiar bronze or japanned (black) pimply stems. In the 1980s it was changed to Erythrorchis cassythoides. The name Erythrorchis is derived from the Ancient Greek words erythros meaning "red" and orchis meaning "testicle" or "orchid".
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The characteristic black, pimply stems |
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The flower (from a plant in Perseverance Forest) |
Acknowledgements
Photographs: F. Mangubhai
Fauna
Birds: Australian Wood Duck, Crested Pigeon, Straw-necked Ibis,
Galah, Cockatiel, Rainbow Lorikeet, Musk Lorikeet, Pale-headed Rosella,
Pheasant Coucal, Laughing Kookaburra, White-throated Treecreeper, Superb
Fairy-wren, White-throated Gerygone, Yellow-rumped Thornbill, Spotted
Pardalote, Striated Pardalote, Yellow-faced Honeyeater, Noisy Miner, Scarlet
Honeyeater, Striped Honeyeater, Grey-crowned Babbler, Golden Whistler, Grey
Butcherbird, Pied Butcherbird, Australian Magpie, Grey Fantail, Willie Wagtail,
Torresian Crow.
Mammals: Probably Pale Field Rat
(Rattus tunneyi) – burrows only.
Flora
discussed or taken note of on the day (not a comprehensive list): * introduced species
Grasses: Stout Bamboo Grass (Austrostipa
ramosissima), Kangaroo Grass (Themeda
triandra).
Orchids: Black Bootlace Orchid (Erythrorchis cassythoides).
Shrubs: Coffee Bush (Breynia oblongifolia), *Lantana (Lantana camara).
Trees: Silver Wattle (Acacia nerifolia), Forest She-oak (Allocasuarina torulosa), Spotted Gum (Corymbia maculata), Grey Gum (Eucalyptus biturbinata), Narrow-leaved
or Red Ironbark (Eucalyptus crebra), Yellow
Box (Eucalyptus melliodora), Tallowwood
(Eucalyptus microcorys), Blackbutt (Eucalyptus
piluralis), Sydney Blue Gum (Eucalyptus
saligna), Native Cherry (Exocarpos
cupressiformis), Crow’s Ash (Flindersia
australis), Scrub Wilga (Geijera
salicifolia), Sandalwood (Santalum
obtusifolium).