RHODODENDRONS IN THE NEWS

New Species Described
June Bee –New Hybrid by Warren Berg
Vireya Seed List
New Release in 1999 by RSBG
Damaged Seed Pods in Native Azaleas
To Register or Not by Marc Colombel
Plant Portrait -- R. fortunei
new.jpg (2981 bytes)Research

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New Species Described --Rhododendron rushforthii

Rhododendron rushforthii is described as a new species in section Vireya, subsection Pseudovireya. It has been named by Dr. George Argent and Dr. David Chamberlain, both of the Royal Botanical Garden, Edinburgh. This species is named after Keith Rushforth who collected it as a group of seedlings on an expedition to Vietnam in 1992. Mr. Rushforth has grown the plant to maturity. It flowered in 1995. It is a yellow. Because it has survived several degrees of frost, it may prove a valuable plant for breeding. (Reported by Hank Helm. Kitsap Chapter Newsletter, May 1997)


June Bee – A New Hybrid by Warren Berg

June Bee was hybridized by Hybridizer Warren Berg several years ago but has recently been named and placed on the market. It is a hybrid of R. keiskei x ‘Mary Fleming’, It is a profuse bloomer. It covers itself with small white flowers on a semi-dwarf plant, similar to ‘Ginny Gee’. It is compact and tightly branched. Hardy to -10 degrees F. It was named for June Sinclair, fellow rhododendron enthusiast and neighbor of the Bergs.

June writes the following, "June Bee is a very good white with excellent foliage. It grows a lot like Ginny Gee only a little wider, maybe more totally rounded in shape but equally dense and as profuse a bloomer. It is very adaptable as to site, exposure and water requirements, roots very easily and can bloom in the cutting bench. Seems resistant to disease and insects. An extremely easy doer. Like all of Warren's hybrids it had a long trial period before he named and registered it. The cross was made in 1970. It took years of pressure from fans of the plant before this clone was chosen for it’s superior qualities."

Warren responds with the following, "Some of that pressure, as you might know , was from June, so rather than get shot, I named it after her."

[Editor: You have to know both June and Warren to appreciate this good humor between these two rhododendron friends]

 


Vireya Seed List

A new ARS Vireya Seed list which is updated several times a year is now available. Email to: wmoyles@pacbell.net. (From California Chapter News, February 1998)


New Release in 1999 by RSBG

‘Golden Comet’ is a form of the fragrant yellow azalea, R. luteum, which is planned for release in 1999 by the Rhododendron Species Botanical Garden. (Seen in the Portland Chapter Newsletter, December 1997)


Damaged Seed Pods on Native Azaleas in North Carolina: The 1997 season has shown an increase in the number of damaged seed pods on our native azaleas. Despite extremely heavy seed set, only one to two percent had viable seed in a local Hendersonville garden. Dr. Tom Ranney of the Mountain Horticulture Corps Research Station is looking into the problem. It is hoped that he can come up with the identification of the insect involved in the problem and how to solve the problem. Reported by Karen Rhoads, Southeastern Chapter Newsletter Editor.

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To Register or Not to Register by Marc Colombel

I think there are as many people who want to register all rhododendrons as there are those who want to register only saleable plants. Why only saleable rhododendrons? Who is going to decide which rhododendrons are saleable? Only the market will tell us after many years. Overall the registration form is not a certificate for the trade.

When a baby is born into a family, we "register" him, however you do not know if he is a future "star". But that is how some people can find out who their ancestors are. (I hope they are not the same people who do not want to register all rhododendrons.)

Just imagine that you win the ‘jackpot’ with the most beautiful rhododendron. You fill in a form. Here it is:

                                Father (unregistered rh. and so on)
                Father (unregistered rh.)
                                Mother (unregistered rh. and so on)
Most Beautiful Rhododendron
                                Father (unregistered rh. and so on)
                Mother (unregistered rh.)
                                Mother (unregistered rh. and so on)

Do you think hybridizers will guess the cross? And SALLEY & GREER? That is why I think it is better to register all of those rhododendrons that you plan to use as parents. However, it is not necessary to register every seedling from a seed pod unless your goal is to register the greatest number of rhododendrons.

I have been told there is a problem about too many names. Should it be possible we are out of names? How many people are there on the earth? Are names really a problem for the people? If there is, I would like to make a suggestion.

Let us take advantage of the year 2000 to begin an international symbol which could be easily understandable by everyone (and, of course, by computers, too). Let me explain:

This is only one example of the symbols which could be used. There are still two years to think about it.

This is my small contribution to this Website. Marc Colombel. (Marc.Colombel@wanadoo.fr)

[Editor: Marc Colombel is president of the French Rhododendron Society (Société Bretonne du Rhododendron).  To connect directly with that site: http://perso.wanadoo.fr/s.b.r./ ]

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Plant Portrait by Dr. Nancy Traill, Toronto Rhododendron Society Newsletter Editor

(From Toronto Chapter newsletter March 1997. Permission granted by Dr. Nancy Traill)

Plant Portrait of Rhododendron fortunei, Lindl. 1859 Fortunea Subsection (Fortunei Series)

It seems appropriate that Robert Fortune, in keeping with his name, discovered this lovely species in 1855. It is a fragrant rhododendron, but unlike those sweetly scented, tender beauties lindleyi, nuttallii and maddenii, R. fortunei is quite hardy.

Fortune's original collections were made in Chekiang province, in eastern China, at about 3,000 feet. Other plant hunters found the species later, in Anhwei, Kiangsi and Hunan growing in woods and forests at 2,0004,000 feet in elevation. Wilson noted that the species was common on other Chekiang mountains, particularly in the Lushan range of the neighbouring province of Kiangsi, to the west (Davidian, 1989. Vol. 2: 196). The range of ssp. discolor is western Hupeh, Sichuan (Szechuan) and Anhwei.

The leaves of R. fortunei are handsome, and show some variation. They are 3 to 7 inches long, 1.5 to 3 inches wide. A prominent and very attractive feature is the deep red of the midrib and petioles (leaf stalks); these create a ring of colour around the dormant bud that seems to deepen and become more conspicuous in winter. The leaves of the Lu Shan form are typically a dull, olive green in colour, and have rich red petioles.

The flowers of R. fortunei are borne in a loose truss of 5 to 12, and are shaped like wide bells (funnel-campanulate). They are pink to pale pinkish-lilac or rose and, of course, fragrant. R. fortunei has been much used for hybridizing, particularly in North America, and especially in the East, where it is appreciated for its tolerance of summer heat and winter cold. It is noteworthy that, according to Cox, "a particularly fine large flowered, sweet scented clone was used as the seed parent of the original 'Loderi' grex" (1990, 170). The other parent in the 'Loderi' grex is griffithianum, a rather tender rhododendron from the lower elevations of the Himalayas.

There are too many hybrids with R. fortunei to even to think of listing here; some of the most popular plants have this rhododendron as a parent, and two great hybridizers, Rothschild and Dexter, made free use of it.  Indeed, one of the most loved hybrids of all time in Eastern North America is Dexter's 'Scintillation'.

[This is one of several Plant Portraits articles by Dr. Traill. More will appear in later editions]

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new.jpg (2981 bytes)RHODODENDRON RESEARCH

Wanted: Information. Dr. Ole R. Vetaas from the Botanical Institute, Bergen, Norway in an email message to Kristi O’Donnell, Meerkerk Botanical Gardens wrote: "I would appreciate some information on geography, climate, and survivorship of the following Rhododendron taxa in different gardens.

  1. Rh. anthopogon; ssp. anthopogon; ssp. hypenanthum
  2. Rh. lepidotum;
  3. Rh. arboreum ssp. arboreum
  4. Rh. arboreum ssp. cinnamomeum
  5. Rh. barbatum
  6. Rh. campanulatum ssp. campanulatum
  7. Rh. campanulatum ssp. aeruginosum
  8. Rh. wallichii;

There is a short questionnaire which will help in my research. If you have any of the above in your garden, please contact me at: Dr. Ole R. Vetaas, Botanical Institute, Allegt. 41, N-5007 Bergen, Norway. FAX:+47 55589667. Email = Ole.Vetaas@bot.uib.no.  You may download the questionnaire from this Website: http://home.sol.no/~hgrimsla/rhodo/arboret/arborete.htm click at Rhododendron research (home.sol...../query1.htm) or look for Norwegian Arboretum - Milde under www-link ARS home page.

Thank you in advance for your help.

Ole R. Vetaas.


Test Trials to Determine Tolerance of Seedlings in Neutral Soils:

From Horticultural Abstracts, June 1997. In Germany test trials were conducted using seedlings of about 180 Rhododendron species and cultivars to determine how tolerant the seedlings were of neutral or near-neutral soils. Most of the rhododendrons required an acid soil. However, R. micranthum seedlings were found to be exceptionally tolerant, growing almost as well at pH 7.1 as they did at the acidic pH 4.2. Many of the other plants showed iron deficiency after a few weeks at pH 7.1 and most of them died within six months.

Comments, suggestions and contribution may be emailed to: bettyspady@AOL.com

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