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Native Orchid Society of South Australia Inc Native Orchid Society of South Australia Inc. PRINT POST APPROVED VOLUME 19 NO. 7 PP 543662 / 00018 AUGUST 1995 NATIVE ORCHID SOCIETY OF SOUTH AUSTRALIA INC. P.O Box 565, UNLEY S.A 5061 The Native Orchid Society of South Australia promotes the conservation of native orchids through cultivation of native orchids, through preservation of naturally-occurring orchid plants and natural habitat. Except with the documented official representation from the Management Committee of the native orchid society of South Australia, no person is authorised to represent the society on any matter. All native orchids are protected plants in the wild. Their collection without written Government permit is illegal. PATRON: Mr T.R.N. Lothian PRESIDENT: SECRETARY: Mr W. Dear Mrs B. Hawkins Telephone: 296 2111 Telephone: 287 0903 VICE-PRESIDENT: TREASURER: Mr R. Hargreaves Mr R. Robjohns COMMITTEE: LIFE MEMBERS: Mr J. Peace Mr R. Hargreaves Mrs K. Possingham Mr R. T. Robjohns Mr D. Hirst Mr L. Nesbitt Mrs. T. O'Neill Mr D. Wells Mr J Simmons (deceased) CONFERENCE CHAIRMAN: Mr H Goldsack (deceased) Gerry Came REGISTRAR OF JUDGES: Telephone: 332 7730 Mr L. Nesbitt EDITORS: R. Bates & V. Maloney TUBERBANK CO-ORDINATOR: 8 Buckley Crescent Fairview Park S.A. 5126 Mr & Mrs T. O'Neill Telephone 289 2305 Telephone: 43 6535 Views and opinions expressed by the authors of articles within this Journal do not necessarily reflect the views and opinions of the NOSSA Management Committee. COPYRIGHT: The NOSSA Management Committee condones the reprint of any article within this Journal, provided acknowledgement is given to the source and author. Price: ONE DOLLAR 61 NATIVE ORCHID SOCIETY OF SOUTH AUSTRALIA INC AUGUST 1995 VOL. 19. NO. 7 JOURNAL AUGUST MEETING Tuesday, 22nd August, 8.00 pm: at St Matthews Hall, Bridge Street, Kensington. Les Nesbitt will talk on NOSSA Spring Shows. Doors to the hall will be open at 7.15 pm for those wishing to borrow books from the library or take in items for the trading table. Voting on the indemnity clause indicated in the July journal will occur at 8pm. PAGE CONTENTS AUTHOR 62 Diary Dates 62 Coming Field Trips 63 On the Bench 63 Dendrobium x kestevenii x tetragonum x suffusum Geoff Edwards 64 Last Months Speaker 64 Open Day July 2nd John Peace 64 Field Trip Report: Hale & Mt Crawford Gary Guide 65 Favourite Orchid Locations: Oulnina Park R. Bates 66 An Evening with Ian Saint George 66 Botanists of the Orchids No. 28 Mark Philips 67 Australian Dendrobiums No. 13 67 New Orchid Hybrid Registrations 68 New Zealand Helmet Orchids 69 Spring Show Schedule COMMITTEE MEETING To be held at 7.30 pm Friday 26th August at the home of L and M Nesbitt, 18 Cambridge Avenue, Vale Park NOSSA OPEN DAY Sunday August 27th Gary Brooks - 7 acre block & Nurragi Reserve. Meet at Strathalbyn Post Office at 10am, We will visit Gary Brooks, Andrew Black and Nurragi Conservation Park in what should be an exciting day. 62 FIELD TRIPS Sunday August 20th - Sandy Creek (morning) & Barossa Goldfields (afternoon). Meet at Cockatoo Valley Service Station and Store at l0am. We will see various Corybas species and hybrids as well as Cyanicula, Pterostylis (several species) and Cyrtostylis robusta. Bring picnic lunch if staying all day. Sunday September 17th Mount Gawler Spider Orchid Special. Meet l0am at Kersbrook shop (near Les Nesbitt's nursery) We will look at Caladenia rigida, C. behrii and C. tentaculata populations. Leader: Darren Williams. (P.S. watch out for snakes!!!) DIARY DATES Aug 20 Barossa Gold fields, Sandy Creek outing. Aug 27 Open Day visit to Gary Brooks' & Nurragi Conservation Park Sept 17 Mt Gawler Spider Orchid Special Sept 2-3 Conservation Group - Messent CP/Potters Scrub visit Sept 23-24 Spring Show Oct 7 -8 South East Adventure Oct 15 Loftia Park bushfire orchids and Kate Hoskins Oct 22 Kyeema excursion Oct 29 Belair Conservation Group Meeting Nov 5 Kuitpo Field Trip, Monadenia threat Nov 26 Christmas Barbecue CONSERVATION GROUP Saturday/Sunday September 2nd - 3rd -Potters Scrub Visit On Saturday we plan to visit Messent Conservation Park and look for orchids, then continue to Potters cottage for the night. On Sunday we will do survey work in Potters Scrub with Birgitte from Black Hill. For details contact Karen Possingham 364 0671. SPRING SHOW SEPT 25-26th 1996 WANTED Volunteers needed to staff the Tea & Coffee stall at the Spring Show. Ring Bill Dear or see him at the next meeting. PLANTS FOR SALE Any growers who have plants for sale at the Spring Show should contact Thelma O'Neill as soon as possible! 63 ON THE BENCH Terrestrials: Acianthus fornicatus, A. exsertus, Caladenia Fairy Floss (rigida x latifolia), Corybas dilatatus, C. incurvus, C. x miscellus, Cyrtostylis robusta, Diuris palustris, Glossodia major, Chiloglottis truncata, Pterostylis curta, P. cycnocephala, P. baptistii, P. stricta, P. vittata, P. aff. nana (3 different ones), P. aff. nana (albino), P. concinna, P. concinna x grandiflora, P. erythroconcha, P. x ingens, P. longifolia, P. russellii. Epiphytes: Dendrobium Golden Chimes, D. Aussie Ina, D. Aussie Zest. D. Ellen (3), D. Bright Spark, D. Fleckwit, D. Ellen x kingianum (= Kathy Banks), D. Jesmond Fancy, D. Pee-wee x Ellen, D. Pee-wee x Kim, D. teretifolium (3), D. kestevenii x tetragonum, D. tetragonum var. giganteum, D. Zip x Aussie Ira.. George Nieuwenhoven gave the commentary on the Terrestrials Reg Shooter spoke on the Epiphytes. POPULAR VOTE: Terrestrials: Glossodia major grown by Les McHugh. Epiphytes: D. x kestevenii x tetragonum x suffusum grown by Geoff Edwards. COMMENTATORS CHOICE: Terrestrial Species: Pterostylis russellii grown by Jan Burford. Terrestrial Hybrid: Pterostylis x ingens grown by Jan Burford. Epiphyte Species: Dendrobium teretifolium grown by Graham Burford. Epiphyte Hybrid: Dendrobium x kestevenii x tetragonum x suffusum grown by Geoff Edwards. Our epiphyte commentator pointed out that all plants were growing in small plastic pots just the way epiphytes like it! They do best if pot bound. One clever grower had inserted the plastic pots inside more attractive clay pots which stopped the plants tipping over. An interesting Australasian hybrid on display was Dendrobium canaliculatum x D. atroviolaceum (A New Guinea species). The pot of Glossodia on display was quite spectacular: 30 plants, most in flower. This is quite an achievement as Glossodia are notoriously difficult and normally flower 2 months later. To top it off the pot had been 8 days at the John Martins Orchid Show and apart from a few bent stems they looked great. The owner has had the pot untouched for several years. The first plants from the Kuitpo rescue dig last December were present. These were Corybas which shared features of C. dilatatus and C. incurvus. They may have been hybrids (C. x miscellus). This hybrid often occurs in pine forests. The three very different Pterostylis nana on display were a good indication that several species were involved. Our commentator suggested there may be 20 to 30 species at present lumped under the one name! DENDROBIUM x kestevenii x tetragonum x suffusum by GEOFF EDWARDS I did not win this plant in a raffle (as suggested at the July meeting) but bought it at an Orchid Club of SA trading table for $5 last November. Having never seen the cross before, or even heard of D. kestevenii, but being attracted by the description - star shape, green, red spots, frequent flowering - I decided to give it a go even if the 20 canes, approximately 40cm high, in a 12cm black round plastic pot did not look over inspiring. It was at worst another pot to slowly fill my extended shadehouse. I hung the pot from a top rafter so that it was about six feet off the ground. Open to all elements, mottled shade was provided during the majority of daylight hours, 64 some direct sunlight occasionally coming between the gum trees. Ample air movement is available as is natural rain when it falls. Living at Bellevue Heights our place is on the southern side of the range overlooking the Sturt Gorge. Sheltered from the north but reasonably open to the south and west I find the area is slightly cooler and wetter than the Plains, with less direct light all year round. The open bark potting mix allows good drainage in the wet, cold winter but closer attention is required with watering in the summer. Sometime between buying and showing the plant I put a handful of Dynamic Lifter on the pot (not scientifically decided but because I suddenly found some available time). Then spikes appeared. Ten in all, eventually averaging six flowers per spike with flowers approximately 7cm x 4cm in size, and exactly as described. I took the plant to the June NOSSA meeting but not all flowers were open and their heads hung down. Two days in my office (air conditioned) for my staff to enjoy then the pot sat in our lounge warmed by the gas heater some nights. All flowers opened and looked up. At the June meeting I learnt from Reg Shooter that D. x kestevenii was an early synonym for the plant now known as D. x delicatum. Upton's Dendrobium Orchids of Australia tells me that the original plant from which D. kestevenii was named (after Doctor Kesteven to whom it was given) was collected in 1930 from Alum Mountain in New South Wales. The star shaped flower of the D. tetragonum is predominant in my plant. On the night of the July meeting a last minute rush and discussion with Pauline brought about the decision to take it in, The rest is history. Popular vote.! As I frequently say, these plants survive in the wild without pampering.
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