Northants News 18.1 Spring 2007

Three weirdoes from the show         Trev Wray

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Jeff's Euphorbia platyclada in a 3½" pot. (You can click the images in this article for a better view... just should you want one!)

The title applies to some plants, not any people I hasten to add!

I was on the prowl for photos for the mag and thought that the assembled Euphorbias at the Show were most interesting. I sought Jeff’s permission to move his plant of Euphorbia platyclada to a sunnier place for a decent digipic.

‘Despite what’s been said, it is alive and it’s got flowers on it,’ said Jeff.

Yes, I could see what Jeff meant; it did look rather dead. Platyclada is a distinctly different Euphorbia which reminds me of dried seaweed, though it is not slimy of course. As to its demise, through my macro lens I could see that the plant was covered in flowers and new growth and was actually in very good health. The problem is that the flowers are minute – just 2mm across and surely among the smallest in a genus famous for the smallness of its flowers. 

Some do have brightly coloured bracts, (the poinsettia springs straight to mind) but platyclada lacks these as well. I resolved to take a close up of the flowers so that readers of NN could enjoy the spectacle. I was quite pleased with the result except that when I looked at the pictures on my computer a cobweb was slung between two of the flowers which looked like a hawser. In best artistic tradition I (digitally) painted it out!

Euphorbia platyclada deserves more recognition on the show bench. It is slow growing and coming from Madagascar needs a little more warmth than the common Cape species. I killed a plant in a year, (rather a winter). Jeff’s plant would score highly for maturity, condition, difficulty and rarity. Unfortunately it is just so ugly and the flowers so small that I can never see it doing well on the show bench. Maybe that accounts for the rarity! This actual plant is ISI 971 which was originally propagated from the type collection of Rauh. The ISI people write ‘This oddity should be in every collection’, which says something about the ISI.

 

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It must be alive - it has flowers! - close-up of the flowers on Jeff’s Euphorbia platyclada - is that some seed forming?

 

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Opuntia dellenii ‘reticulata’ a prickly pear with a strange network of scars.

Tina drew my attention to her plant called Opuntia reticulata, another rather strange and none too beautiful specimen with a certain fascination. For a start, why does it grow like that? I sought some help on the internet but there was little information available. Lots of nice pictures though. I did discover that a more complete name for the plant is O. dellenii (or zebrina) forma reticulata or maybe just O. dellenii ‘reticulata’. After seeing this horror I have bought one – purely in the interest of science you understand, simply to see how it develops the network markings. I might even cut it up to look inside! Watch this space.

 

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Opuntia dellenii ‘reticulata’ - a close-up of the 'rets'.

The last of my little threesome of horrors was a small plant of Stapelia engleriana. The four-sided stems had the usual Stapelia chunkyness but in pale (dare I say sickly) grey-green. It is apparently supposed to be like that. Now Stapelias often sport large spectacular flowers, those on S. gigantea are up to 40cm (15 inches) my books tell me. Most have a starfish shape and a few species have the extra refinement of hairs on the corolla lobes (what most of us would call petals). This deviant had button like flowers and they were tiny, (less than 2cm), and they faced downwards and they were so dark they were nearly black. Only its parents would love it.

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Apparently the flower is starfish-like but the corolla lobes reflex back to the stem. This confused the botanists, (who call a flower stem a peduncle), and erroneously included it in the genus Tromotriche, a genus so obscure that not even the MS Word dictionary has a suggestion for it.

Stapeliads in general have a reputation for sudden death and miffyness, the usual demise used to be called the ‘black death’. My few survivors are probably rootless for half the year. Perhaps one good thing going for this species is that it comes from the Northern and Western Capes of South Africa which would put it among the easier to grow. It should score quite highly for rarity, I don’t suppose there are many in Northants Country, but if I grew just one Stapelia (or even Tromotriche) it would not be this one.

There were some great plants at the show but these three weirdoes I have featured show some of the diversity of succulents being grown at our branch, I wonder what this year’s show will bring.

Trev

 

More freshly gathered yarns from the 

world of seeds                      Doug Rowland 

Doug has more snips from his life as a seed supplier…

31. Occasionally we get seeds of Pterodiscus luridus in from South Africa. These hard woody capsules are said to contain two seeds. But so far, no one has been able to get one of these capsules open to find out.

32. Sometimes Crinum and Haemanthus seeds arrive from the R.S.A. and are found to be germinating in the packet. There is not much that you can do with these except to try and sell them quickly and sow pronto what are left. The Ornithogalum called the ‘Pregnant Onion’ also occasionally arrives from India, but these are bulbils that look like seeds. These also sprout in the packet and have to be distributed and sown quickly.

33. Cycad and Palmae seeds can occasionally cause problems. Most are quite expensive to buy in commerce, they have quite a short viability and are really too big and heavy to receive and send out again by Air Post. A further problem with Cycad seeds is that often they are immature and collected before seeds are properly ripe.

34. When in Arizona a few years ago, a friend of mine had a large 5’ high rosette of Dasylirion wheeleri in his garden with a further 5’ ripened flower spike. You could see the seeds all up this stem, all nice and brown and ripe. A ladder of suitable dimension and a saw were found, and with some difficulty sawed through the hard wood of the seed spike and eventually got it on to a concreted area. We picked off and swept up about half a carrier bag of seeds. Happy, we sat on a bench and relaxed. Then I had a thought, let us have a closer look at the seeds. The plant was quite solitary, no other around. It had not been pollinated and all the seeds were just dried husks. Not a single viable seed on the plant. Well, as they say, you can’t win them all.

A few days after this episode with the immature Dasylirion seeds we were travelling near to Bisbee in southern Arizona, and came across a similar plant of Dasylirion wheeleri in seed similar to the unfortunate one we struggled with in the garden. We still had the saw in the car and were able to fell and collect lots of viable seeds from the felled stem. Every cloud sometimes has a silver lining.

35. Those of you in the mid 70’s may remember the happy time when stem tips of Backebergia militaris were on sale at all the best nurseries. The ends of the stems consisted of a large ginger hairy cephalium. The plants are tropical, from Mexico, and appeared to be very unsociable as they did not root or graft. The stems were terminal and had finished their vigorous time of life. However, a little success was to be had, for there were dried seed berries within the cephalium, some yielding seeds which would germinate. These little Cerei grew quickly during their first summer, but were very tender and most perished the following winter in cool cactus houses.

36. We occasionally obtain seeds from very strange sources. A couple of years ago we washed out some soft and rather soggy seed berries of Opuntia ficus-indica. They certainly were ripe. At that time, habitat locations were in vogue so we listed it as Pitahaya from Sainsburys, Kempston.

37. An American friend of mine decided to do some in depth experiments in raising Echinocereus triglochidiatus from seeds. This was a local species and grown in the garden, so viable and fresh seeds were always available in quantity. However, the further he got with his experiments, the more problems arose. He even experimented with sowing according to the moon’s phases at night. He told me later that he had discovered two significant factors.

(1) In years when extreme drought conditions existed, seeds are smaller and lighter in weight than in years of better rainfall, and

(2) There are more negative things that you should not do than there are positive things that you should do.

Ed: After a glass or two of wine I am very inclined to agree!

38. Letter from a scatterbrain. Dear Doug, You have not sent me the seeds that I thought I ordered.

39. And... Dear Doug, Please send me one small packet of each of all the small Aloes and smaller Agaves on your List. (Has anybody there got two days to spare to look this lot up Trev. (- Ed: No!)

40. By far the most popular species of seeds in 2005 was surely Lithops viridis, a little green clustering Lithops not often available. Three customers bought out our entire stock on the first day the list was out.

Doug

The final installment of Doug’s world of seeds in the next issue.

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