Tag Archives: Spring

Spiders

One aspect which makes orchid really appealing is their variety and beauty.  They are stunning pieces of artwork.  Here are some photographs of some of the spider orchids (Arachnorchis) that grow in South Australia.

The most common spider orchid is the King Spider Orchid, Arachnorchis tentaculata.  It is a stunning orchid, and one of the larger ones, being up to 10 cm across.

Arachnorchis tentaculata

Arachnorchis tentaculata

The Queen Spider orchid, Arachnorchis leptochila, is not as common in South Australia.  It is smaller than its sister, and has a more rigid flower.

Arachnorchis leptochila

Arachnorchis leptochila

There are many other spider orchids, but one of my favourite ones would have to be  Arachnorchis rigida.  It’s white petals are so crisp.  This is also quite a small flower.

Arachnorchis rigida

 

The Mayfly

Nemacianthus caudatus – Mayfly Orchid

Acianthus pusillusThis little orchid is very similar to Acianthus pusillus but flowers in spring instead of autumn.  It has similar heart-shaped leaves to Acianthus pusillus, but the flowers are very differentThey are often found growing together.

The Mayfly orchid has graceful long sepals compared to a relatively small flower.  The whole flower stalk is a dark red, which makes it a challenging subject to photograph in low light.

It is often found growing at the base of tress in the leaf litter, in small colonies.  The flowers attracts its pollinator, a small gnat, by giving off a musty odour which we can also detect.  Once pollinated, the ovaries (pictured left) swell with many tiny seeds within.

Nemacianthus caudatus.docx

Know Them

Some Spider Orchids

The spider orchids, Arachnorchis sp. are a rather beautiful genus, with quite a lot of diversity.  Today, I will just be showing two of my favourites.

The first one is Arachnorchis rigida.  It has been several years since I’ve seen this beautiful flower, and I would like to see it again, but sadly it it not that common.  Looking through all the pictures we have taken, I couldn’t really find anything that does justice to this beautiful flower.  Even a Google search did not yield anything spectacular.  It would be great to take some nicer pictures, maybe this year…?

Arachnorchis rigida

I love the soft pink on white.  In the picture above it reminds me of icing.

Arachnorchis rigida

Another beautiful species is the Arachnorchis reticulata.  There is quite a broad diversity in the colouring of this orchid, as can be seen by one labellum being darker than the other.

Arachnorchis reticulata Arachnorchis reticulata

Special thanks again to Dad for this pictures.

Orchid Hunter Australia Videos

Last year when I browsed through YouTube for orchid videos, I did not find many that were interesting.  However the other day, I had another look on-line  and it appears that a few Australians have been uploading their videos of orchids, and I would like to share with you some of them.

The two that leaped out at me are called Orchid Hunter Australia 1 & 2, filmed and produced by Julian Pitcher.  They are of Victorian orchids, but apply to orchid hunting right across Australia.  Let me congratulate Julian on doing such a great job, and I really look forward to seeing more of these videos.

Orchid Hunter Australia 1

In this first videos, Julian introduces us to some of the basic things to look for when orchid hunting, and I felt he really captured what it is like to look for orchids, and how they can blend into the bush.

Orchid Hunter Australia 2

This is probably my favourite of the two, as looking for orchids turns into a military expedition.  It really feels like that sometimes!  It was also good to find information about other plants and animals in the video, as they all influence the whole ecosystem.

Corysanthes diemenica

This is a short film  by Richard Davion which captures some of the joy of finding orchids.

What I enjoy about seeing films of orchids is that it captures the three diemnsional feel of the flowers, which is lacking in orchid photography.  Later on I would like to spent time producing my own videos with narration, and helping in identifying orchids.  But in the meantime I will enjoy what others are producing.  It is about making other aware that these tiny terrestrial orchids are there, and need to be protected.

For other orchid videos please visit the video page, or my YouTube channel.  Please help me share these videos.

Our orchid photographs

I took my first photographs of native orchids in February 2005 at a monthly general meeting of the Native Orchid Society of South Australia (NOSSA).  Orchid growers bring their flowering plants to the monthly meetings to show them and to compete for the best orchids.

2005 Feb 017

This is one of my first photographs of an orchid taken with
a digital camera without a flash in February 2005.  This is a Sarcochilus hybrid.

My aim at the start was quite simple.  I just wanted to get to know the names of the orchids, because I did not know any of them at all.  Three of my photographs from the February meeting turned up in the electronic version of the March NOSSA Journal, including the one above.

In the March 2006 issue of the Journal, because there were few plants at the meeting to photograph, the Editor compiled a page of photographs of orchid leaves which I had taken on a field trip to Scott Conservation Park the previous winter.  Some of these same photographs appear in my book, Start with the Leaves, including the two of the photographs on the front cover.  One couple told me that they took this page with them into the field to identify orchids before they flowered.

Leporella fimbriata 005

This beautiful, newly emerged leaf of Leporella fimbriata is one of my first orchid
photographs taken in the field.  It features prominently on the cover of my book.

My reasons, then, for photographing orchids were so that I could get to know them, and to share them with others.

Incidentally, some of the flowers are strikingly beautiful.  When my children were helping me prepare the book, they were not happy with pictures that just showed the features relevant for identification; they wanted each photograph to be attractive and balanced.

We went on NOSSA field trips to learn about orchids and photographed them to help with this.  We went with our compact cameras while the photographic enthusiasts took their SLR cameras and their tripods.  We found the digital cameras to be adequate for our purposes and all of the pictures on this blog have been taken with either a compact digital camera or a smart phone.

In May 2011 NOSSA began having a photographic competition to give members the opportunity to share their best photographs.  I entered my favourite photograph of Diuris orientis, which I regard as the most photogenic of our orchids because of its size and depth of rich colours.  This photograph was included in the header in an earlier version of the banner for the Trees For Life website.  This was the first photograph to win this competition.

Diuris orientis 026

Diuris orientis photographed in full sunlight on 4 October 2005.
Notice the splendid rich colours.

We have seen a wonderful selection of photographs from members of NOSSA at the general meetings since this first competition.  The only prize is to have the photograph displayed for a month on the NOSSA website.  Unlike most of the followers here who share their photographs on the net, most of the participants have not shown their pictures before.  This event has been about sharing photographs rather than winning prizes.

The people who judged the orchids at the general meeting had set an example of having two of them speak about the orchids that had been “benched.”  So, the practice with the picture competition has been to use this as an opportunity to have somebody speak about the orchids photographed.  There was also an informative Journal article about the monthly winning photograph and a similar post on the NOSSA website.  This educational aspect makes the competition worthwhile.

The pictures displayed at the meetings are only seen by the 30-40 people attending the monthly meetings, but I hope a larger audience will be able to see them.

What bothers me is the thought of hundreds of photographs stored on home computers that have hardly been seen by anyone and are just waiting for a hard drive to crash when they will be lost for ever.  Some may be historical showing orchids where they no longer occur.  I would like to explore this idea on a later post.

Monitoring orchids

I am delighted to have been invited to be an author on OrchidNotes and this is my first post.

Native Orchids are fascinating and beautiful.  There is an amazing variety, as posts on this website show.  Many are quite small and easily overlooked, but they are often surprisingly easy to find.  They commonly like open areas and occur next to walking tracks in national parks.  Others are more elusive and only occur in special locations.

Glossodia major

Part of a large population of Glossodia major (Purple Cockatoo)

Many orchids are highly adapted and have very limited habitat requirements.  They will flourish when the conditions are right, but they will disappear when the conditions change. This means that conserving orchids is important.  They will be lost for ever if there is indiscriminate modification of areas of habitat and future generations will miss out.  If orchid habitats are kept intact, then habitat for a great variety of flora and fauna will also be protected.

We have met many people with a love for orchids in their natural environment, including those of you who follow this site.  Many people have been keeping lists of species that they find each year at their favourite orchid sites.  Some have huge collections of photographs that hardly anyone sees.

What these people have been doing is observing species diversity.  This is an important measure of the health of an ecosystem, but there is much more that could be observed in a systematic manner that uses native orchids to measure and understand processes happening in the local ecology.

Oligochaetochilus arenicola locations (4)

Monitoring sites could be established to observe changes in orchid populations from year to year.  These could document changes in the number of plants of each species.  The timing of emergence of leaves and flowers could change from year to year with different weather conditions.  Pollination rates could provide information about the insects that the orchids depend on.  Indeed, pollinating insects are yet to be observed for some species.  The proportion of plants flowering changes from year to year.  Orchid populations are not static, and a population may disappear from one site and a new one may appear elsewhere.  All of these observations can be made with the common orchids.

Oligochaetochilus arenicola locations (3)

Individual orchids have been found and flagged ready for counting.

It needs to be said that there are two main risks in drawing attention to orchids.  One is that some people dig up orchids that they like and they dig them up from the local habitat.  This is tragic and foolish because the orchids are highly specialised and usually are very difficult to grow in cultivation.  The other problem is trampling of the orchids and the surrounding plants by people seeking to observe them.  Both of these issues need to be considered carefully.

I am organising the design of orchid monitoring programs.  These could involve a combination of trained scientists and volunteers.  I am interested in finding out how much people would be interested in being involved in orchid monitoring using disciplined and systematic methods to collect important information about the orchids and their habitat.

Glossodia major 26

New Website

http://saorchids.files.wordpress.com/2013/01/header.jpg?w=564&h=175

I’m quite excited to announce that I have a new website.  Please check it out:

Gallery of South Australian Orchids

It has a selection of photographs of South Australian orchids.  The site is mainly static, so if you want to hold a conversation, it is best to do that here on OrchidNotes.  Please let me know what you think of the new website.  Most the pictures you see here, you will probably see on the other site.

Very soon, there will be a new author for OrchidNotes.  Robert Lawrence, author of Start with the Leaves, will be providing some articles here, which is another exciting development.

Recently I’ve added some more information on this site under the “tabs” so you might like to check it out.