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Overview

Some Notes on Native Orchids

Most orchids grow in the ground (terrestrial) and are deciduous; but others grow in trees (epiphytes) and others on rocks (lithophytes), or sometimes on either.

Most terrestrial species are identified by either a single leaf or group of leaves (rosette), while only a few have no leaves. The majority of leafless terrestrials are saprophytic, indicating their reliance on a mycorrhiza fungus in the soil for their survival. Another small group of terrestrials have leaves visible at all times (evergreen).

Orchids have six floral parts, collectively referred to as the perianth segments. These are individually called petals, sepals and the labellum, which is a greatly modified petal. In many terrestrial orchids the segments are often difficult to view separately; for instance, the Pterostylis genus has a hood or galea, a combination of the dorsal sepal and petals, whereas within the Corybas group, flowers are dominated by the dorsal sepal and labellum.

Successful identification of native orchids in the Atlas of Life Budawang Coast using photographs needs to show these components clearly, in particular the labellum, the shape and texture of which very often determines the difference between one species and another. The colour of a native orchid is not always a reliable distinguishing feature.

The male and female sexual parts of the flower - the stamens and style - are combined to form the column. Located centrally in the flower, these parts are conspicuous and close together. Pollen in most orchids is known as pollinia, which is an amalgamation of very small grains into a single unit, removed by an insect during the pollination process. Pollination is achieved in most native orchids by an insect, often matched to a specific orchid species, and is a process that is occasionally observable. Pheromones, a kind of scent, are emitted by the plant to attract the insect, in some cases using floral mimicry to deceive it into responding to the markings of a female of the species. Other plants, such as Caleana major (Large Duck Orchid) use a trigger mechanism to trap the pollinator inside the plant until the pollinia is removed.

Identification and naming: check through the orchid 160 species list known to exist in ALBC and see if a match can be made. Orchid Species of the Shoalhaven (2011) by Alan W. Stephenson ISBN 978-0- 9581679-1-8 is available in some local libraries and bookstores for reference. The Australian National Botanic Gardens has a CD available to help with key identification:  https://www.anbg.gov.au/orchids/index.html

 

Page 1 of Orchids - 192 species

Acianthella amplexicaulis Mike Leggett
Acianthella amplexicaulis Mike Leggett
Acianthella amplexicaulis
Acianthella amplexicaulis

More information

Orchid Acianthus caudatus (Mayfly Orchid)

Orchid Acianthus exsertus (Mosquito Orchid)

Acianthus exsertus Mike Leggett - Nowra
Acianthus exsertus Mike Leggett - Nowra
Acianthus exsertus Jackie Miles, Rye Park near Yass
Acianthus exsertus
Acianthus exsertus
Acianthus exsertus

Orchid Acianthus fornicatus (Pixie-caps)

Acianthus fornicatus Jackie Miles
Acianthus fornicatus Jackie Miles
Acianthus fornicatus Alan Stephenson
Acianthus fornicatus
Acianthus fornicatus
Acianthus fornicatus

Orchid Acianthus pusillus (Gnat Orchid)

Acianthus pusillus Jackie Miles, Brogo
Acianthus pusillus Jackie Miles, Brogo
Acianthus pusillus Jackie Miles, Brogo
Acianthus pusillus
Acianthus pusillus
Acianthus pusillus

Orchid Acianthus sp. (Mosquito Orchid)

Orchid Arthrochilus huntianus (Elbow Orchid)

Arthrochilus huntianus Jackie Miles
Arthrochilus huntianus Jackie Miles
Arthrochilus huntianus
Arthrochilus huntianus

Orchid Bulbophyllum exiguum (Tiny Strand orchid)

Bulbophyllum exiguum Mike Leggett - Bomaderry
Bulbophyllum exiguum Mike Leggett - Bomaderry
Bulbophyllum exiguum Mike Leggett - Bomaderry
Bulbophyllum exiguum
Bulbophyllum exiguum
Bulbophyllum exiguum

Orchid Bulbophyllum shepherdii (Wheat-leaved Orchid)

Bulbophyllum shepherdii Alan Stephenson
Bulbophyllum shepherdii Alan Stephenson
Bulbophyllum shepherdii Alan Stephenson
Bulbophyllum shepherdii
Bulbophyllum shepherdii
Bulbophyllum shepherdii

Orchid Burnettia cuneata (Burnettia)

Orchid Caladenia alata (Fairy Orchid)

Caladenia alata Fairy Orchid - Caladenia alata - Porters Creek road
Caladenia alata Fairy Orchid - Caladenia alata - Hyams Beach
Caladenia alata Alan Stephenson
Caladenia alata
Caladenia alata
Caladenia alata

Orchid Caladenia carnea (Pink Fingers)

Caladenia carnea Jackie Miles, Montreal Goldfields, Bermagui
Caladenia carnea Jackie Miles, Montreal Goldfields, Bermagui
Caladenia carnea Jackie Miles, Green Cape
Caladenia carnea
Caladenia carnea
Caladenia carnea

More information

Orchid Caladenia catenata (White Caladenia)

Caladenia catenata
Caladenia catenata
Caladenia catenata
Caladenia catenata
Caladenia catenata
Caladenia catenata

More information

Orchid Caladenia fuscata (Dusky fingers)

Caladenia fuscata Petalochilus fuscatus
Caladenia fuscata Petalochilus fuscatus
Caladenia fuscata Alan Stephenson
Caladenia fuscata
Caladenia fuscata
Caladenia fuscata

Orchid Caladenia gracilis (Musky Caladenia)

Caladenia gracilis Jackie Miles
Caladenia gracilis Jackie Miles
Caladenia gracilis Jackie Miles
Caladenia gracilis
Caladenia gracilis
Caladenia gracilis

Orchid Caladenia hillmanii (Purple Heart Orchid)

Caladenia hillmanii Alan Stephenson
Caladenia hillmanii Petalochilus hillmanii - Mike Leggett
Caladenia hillmanii Petalochilus hillmanii - Mike Leggett
Caladenia hillmanii
Caladenia hillmanii
Caladenia hillmanii

Orchid Caladenia mentiens (Lesser Fingers)

Caladenia mentiens Mike Leggett
Caladenia mentiens Alan Stephenson
Caladenia mentiens Alan Stephenson
Caladenia mentiens
Caladenia mentiens
Caladenia mentiens

Orchid Caladenia phaeoclavia (Brown-clubbed spider orchid)

More information

Orchid Caladenia picta (Painted fingers)

Caladenia picta Jackie Miles
Caladenia picta Jackie Miles
Caladenia picta Jackie Miles
Caladenia picta
Caladenia picta
Caladenia picta

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