Monday, January 09, 2006

Jan Sked
Pine Rivers

All my Hoyas are grown in hanging baskets that are located in trees or shrubs in the garden. Some of the baskets eventually fall to bits and the Hoyas drop down into the garden and either continue to thrive or disappear forever. I use small hanging baskets, 200mm in diameter, as Hoyas prefer to have their roots constricted. The mix I use in the baskets is two parts premium commercial potting mix, one part sand and one part coir peat. It is the same mix I use in most of my pots.

The first Hoya I ever grew was given to me by well known Queensland SGAP member Merv Hodge in 1977. It was simply known as Hoya australis. I do not know which subspecies it belongs to. It is still growing on a fence in the garden, but has not been a very good flowerer. The leaves are particularly large, up to 16cm long and quite glabrous. The flowers are white, fairly small and in sparse clusters.

My next two Hoya australis were given to me by Norm McCarthy of Toowoomba in 1979. Once again I do not know which subspecies. These two seem to have died out, as I have not seen them for some years.

In 1982 I obtained a plant at the SGAP Flower Show which was labelled Hoya keysii. In later years this became Hoya australis ssp. australis, and it has proven to be by far my best Hoya. I have grown many plants from cuttings from this plant and distributed it amongst many SGAP members and friends. It has pale green felty leaves and the showy flower heads are up to 7cm across with about 20 pure white waxy fragrant flowers. I believe the first collection of this species was made at Mt. Perry in 1884.

In 1982 I also obtained a specimen of Hoya australis ssp tenuipes from the SGAP Flower Show, probably from David Liddle. It was labelled at the time as "Hoya sp. Langkelly Creek". The leaves are thick, light green, with undulate margins. It flowers in October with heads of white fragrant flowers, about 1 - 1.5cm across, not as numerous or quite as large as Hoya australis ssp. australis.

In 1985 I added another of David Liddle's Hoyas to my collection. This time it was Hoya australis ssp. oramicola, labelled at that time as Hoya sp. aff. australis. This species comes from the Northern Territory and the north-west of Western Australia. The dark green leaves are thick and glabrous, and when juvenile the edges are tightly recurved. The heads of white flowers are smaller than the other Hoya australis I have grown. It flowers in March.

Hoya potsii is a very successful Hoya in the garden. It was known for many years as Hoya nicholsoniae, and occurs naturally in north Queensland, from the Iron Range to Townsville. The foliage is an attractive feature of this plant. Leaves are oval-shaped, thick and fleshy, with pronounced parallel silvery venation. They assume shades of maroon, copper, red and purple in bright light. The flowers are cream to pale yellow, 1 - 1.5cm across, in dense heads of up to 30 flowers. Their perfume can usually be detected towards evening. Flowering in my plant has been recorded from October to January. I obtained this plant in 1981 from Fairhill Nursery at Yandina.

The rare and spectacular Hoya macgillivrayi is very hard to get to flower in my garden. In fact, it is pretty touchy to keep alive at all. It occurs naturally in the McIlwraith and Iron Ranges of Cape York Peninsula. My first one was a gift from a Pine Rivers member in 1981. I lost it after a number of years, probably because the position I had it in was not very good. It did flower for me a couple of times and these flowers are well worth waiting for. The flowers were in umbels of seven, each flower about 6cm across, a purple colour shading to white at the centre of the corolla. I grew a second specimen from cutting from this plant, but both have since passed out of existence.

My third and fourth Hoya macgillivrayi were obtained from the SGAP Flower Show in 2001. They are both growing quite well - one in full shade within my rainforest and the other on the edge of the rainforest where it gets good light, but little direct sunlight. Interestingly, the one that has flowered has been the one in deep shade. The flower colour is different from the first two specimens I had. This one has reddish-purple flowers with no white in the centre.

At the SGAP Flower Show in 1981 I obtained a plant labelled Hoya rubida. It has also gone under the name of Hoya lauterbachii, and is now reclassified as Hoya sussuela, This one is very striking with flower heads of up to 12 dark red waxy flowers (5cm across). The outer part of the corolla is a light fawn-brown colour, making it an interesting contrast. It flowers from March to May. This one comes from north Queensland in the McIlwraith Range area. Sadly, I eventually lost this one and have never been able to find a replacement.

Another species that I have grown but since lost is Hoya anulata. This is listed as a rare plant. Two of these species came my way via David Liddle in 1982 and 1983. This species has gone under the names Hoya pseudolittoralis and Hoya poolei. This one comes from the Iron Range area of north Queensland. The leaves are about 5cm long, oval-shaped and fleshy. They turn bronze to red when exposed to the sun. The flowers are in loose umbels of about 10 flowers, and these are pale pink to white with dark pink centres.

Two unamed hoya species were also obtained in 1983. One was labelled Hoya sp. Bamaga and the other Hoya sp. aff. holrunghii.. These two have disappeared into the garden and have not been seen for some time. I don't remember what the flowes were like, but I believe they were white in both cases.

Another Hoya species from north Queensland was given to me by a former SGAP member in 2003. It has not yet flowered for me, but the person I got it from gave me a photo of the flowers, which appear to be about 2-3cm across and pure white, in umbels of seven. The plant has very large leaves, up to 18cm lon. Both stems and undersides of the leaves are hairy.

I also have a few exotic Hoyas that came my way. The first is Hoya carnosa (Pink Wax Flower), which has been a favorite in general cultivation for many years. It was originally believed to be a native species, but these days it is not recognised as such. I believe it grows on Christmas Island, which is an Australian Territory. This species has flowered regularly for me from October through to March ever since I got it, and the flowers are quite beautiful - pale waxy pink with deeper pink centre, in tight umbels of 20 or more. A very attractive species, it has given rise to various cultivars, of which I have two.

One of the cultivars is Hoya carnos variegated, which has fleshy cream, green and pink leaves. It is supposed to have fragrant pink flowers, but so far has not flowered for me. In fact, it does not appear to be a particularly happy plant.

The other cultivar is quite spectacular. I call it Hoya 'Black Magic'. The leaves when young are almost black with pink and cream splashes on purple-black stems. These gradually change to green with white splashes on green stems. Leaves and stems are glabrous. It is a very vigorous grower and flowers profusely from October through January. The flowers need to be seen to be believed. They are 1.5cm across, velvety black with red centres in tight umbels of up to 30. I have given away many cutting grown plants of this one, as anyone who sees it in flower wants it.

Another exotic I actually bought from Big W is Hoya purpurea-fusca. It has glabrous leaves up to 13cm long with 3-5 parallel veins from the base. According to the label the flowers are lightly fragrant, 1cm across, in large clusters. They are light pink with darker pink centres. So far I have been a bit disappointed with the flowers. Very few have been produced and they have only been in fairly sparse umbels, but they are quite pretty, although not as attractive as the label shows. It is growing quite well.

My last and very exciting Hoya is another one from my ex-SGAP friend, who thought it was probably an exotic. I got it from him in 2003 and it has produced its first flowers in February this year. What a surprise they proved to be - large flowers 6cm across in umbels of 7, with creamy-yellow corolla with maroon edges. The leaves are thick and leathery, up to 18 cm long by 5-8cm wide, mostly with undulate margins. New leaves and stems are hairy, but old stems and leaves seem to lose much of this hairiness. I was so excited when it flowered that I took some photos and emailed them off to Paul Forster at the Queensland Herbarium, who was able to identify it immediately for me. It is Hoya imperialis from Malaysia.

I hope to add more species to my collection, although I am running out of trees to attach them in. I would like to obtain again some of the ones that I have lost over the years.
SGAP display at Visitors Centre , Tondoon - month February 2006
SGAP has been invited to set up a display with set up 1-30 pm Tuesday 31 st Jan 06. If you wish to help please contact Ruth by phone.
We can have a discussion on 15 th Jan 06 about what each member can do to help.

Gladstone SGAP .

AGM Walk and Talk
Sunday , 15th of January
At 10.00 am , meet Gardens Cafe , Tondoon , morning tea.
At 10-30 am we commence walk around gardens,
Before departing please order lunch for 12-30 pm.
Lunch will be until 1-30 pm.
Following this we move into visitors center for a presentation by David Hall on Native Succlents.
At approximately 2-30 we will have AGM,and compile calendar of excursions and meetings for 2006.
Please bring specimens of succulents and weeds.

This is the 30th year of Gladstone SGAP , please attend and help the branch during 2006.


Gladstone Branch

Friday, January 06, 2006

Spot the SGAP members!
From Weedwatch, the newsletter of the Cooperative Research Centre for Australian Weed Management, Volume 2 November 2005, page nine.

L to R: Joy Brusche, Bev McKay, John McKay, Anna Hitchcock and George Gibson do Weed Spotter training.

To find out more about the Weed Spotter network, check out this link:
  • Weed Spotter network
  • Blackberry (Rubus) Identification

    Text below from the website:
    "Blackberry is an interactive CD ROM enabling the identification of all species of Rubus presently known to occur in Australia. From this first step of identification will follow the next stage of documenting the most effective means of control of each of the species of the Rubus fruticosus aggregate. Once these means have been established this information can be added to future versions of the Blackberry tool."

    Check out the link:
  • Blackberry CD ROM
  • From Weedwatch, Vol 2 November 2005
    Newsletter of the Cooperative Research Centre for Australian Weed Management

    "Bushland-friendly gardens: weed-free wonderlands

    The Weeds CRC has developed a new website area, named
    Bushland-friendly gardens, that suggests which plants should be avoided in our gardens.
    While there are many organisations that currently present weed information in a myriad of formats, we felt that it was just too difficult for many gardeners and landscapers to find out this information on a regional basis. Our website provides a 'one-stop shop' in the form of a 'clickable' map that will generate two lists of commonly available garden plants that should be avoided in your chosen region.
    We have started at a relatively broad scale by subdividing the states into a total of 22 regions based on a classification of climatic zones alreday widely used in the horticultural industry.
    Reviewing more than 100 lists of problem plants prepared by a range of groups and bodies around Australia, we made the assumption that the more lists on which a plant appears, the more it is likely to cause impact within any region. Therefore, when clicking on a particular region of the map provided, two prioritised lists are generated. Where a plant species appeared three or more times in lists for a region, it was placed into the 'serious environmental weeds' list. We recommend that plants on this list are removed as soon as possible. If a plant species appeared twice, it was placed on the 'environmental weeds to avoid' list, in which case it should not be planted, or at least should be managed with great care.
    We believe that the final weeds lists for each region are a fair representation of the potential and actual impacts for each species.
    While the site does not suggets alternative species to plant, it will point (again on a regional basis) to reference documents and web information that includes such advice.
    To give your feedback please use the facility provided on the website.
    Jackie Watts"
  • Bushland-friendly gardens