Orchid Growing Training Course
On an excursion to Sohila (1,350 m) on the slope of Lehuma Mountain several new records entered the notebook and a display ground of Amblyornis inornatus was found The carefully cleaned platform in front of the house was adorned with various red, grayish-green and white flowers (mostly orchids) and an empty snail shell. At 1,800 m the forest with taller trees and less moss covered was quite different from that on Mt. Mundi only 10 km away by air. Several days were devoted to collect plants and to label all bird skins.
I declare that you read the reviews on the Origin more carefully than I do. I agree with all your remarks. The point of correlation struck me as well put, and on varieties growing together but I have already begun to put things in train for information on this latter head, on which Bronn also enlarges. With respect to sexuality, I have often speculated on it, and have always concluded that we are too ignorant to speculate no physiologist can conjecture why the two elements go to form a new being, and, more than that, why nature strives at uniting the two elements from two individuals. What I am now working at in my orchids is an admirable illustration of the law. I should certainly conclude that all sexuality had descended from one prototype. Do you not underrate the degree of lowness of organisation in which sexuality occurs--viz., in Hydra, and still lower in some of the one-celled free confervae which conjugate, which good judges (Thwaites) believe is the simplest form of true...
Gray's Scientific Papers, I., page 130).) of De Candolle a week ago. It seems to me excellent, and you speak out, I think, more plainly in favour of derivation of species than hitherto, though doubtfully about Natural Selection. Grant the first, I am easy about the second. Do you not consider such cases as all the orchids next thing to a demonstration against Heer's view of species arising suddenly by monstrosities --it is impossible to imagine so many co-adaptations being formed all by a chance blow. Of course creationists would cut the enigma.
Your letter discusses lots of interesting subjects, and I am very glad you have sent for your letter to Bates. (135 1. Published in Mr. Clodd's memoir of Bates in the Naturalist on the Amazons, 1892, page l.) What do you mean by individual plants (135 2. In a letter to Mr. Darwin dated March 17th, 1862, Sir J.D. Hooker had discussed a supposed difference between animals and plants, inasmuch as the individual animal is certainly changed materially by external conditions, the latter (I think) never, except in such a coarse way as stunting or enlarging--e.g. no increase of cold on the spot, or change of individual plant from hot to cold, will induce said individual plant to get more woolly covering but I suppose a series of cold seasons would bring about such a change in an individual quadruped, just as rowing will harden hands, etc. ) I fancied a bud lived only a year, and you could hardly expect any change in that time but if you call a tree or plant an individual, you have sporting...
After the Resident Officer had returned on 12 August they were ready to leave for the Cyclops Mountains on 16 August and on the same day reached Ifaar on Lake Sentani. A number of endemic subspecies of birds inhabiting this grassland region indicate that at least part of the grassland must be old and not man-made. Among the grassland birds were Malurus, Megalurus, Saxicola, and some Lonchura species. On 18 August a camp was established north of Ifaar at about 700 to 750 m elevation. Here they had found a spring, but no other water further up the slope. With several helpers Mayr concentrated for a few days on plant collecting, especially orchids were plentiful in this region. The forests were swarmed by chiggers and, not quite as bad, by leeches.9 It rained a lot, but not as much as on the Wondiwoi Mountains a month earlier. Mayr found the lower limit of distribution of montane birds to be higher here than in the Arfak and Wondiwoi Mountains. He established that most of the montane...
Distribution Lake It asy, Madagascar. Possible explanation The epiphyt ic Madagascan orchid Angraecum longicalcar has a rostrel-lum about 16 inches deep that leads to its nec-t ar -pr oducing or gans. No known local mot h has a proboscis that long. However, entomologist Gene Krit sky pr edict s t hat one must exist, since t he plant manages to pr opagat e it self. Present status The exist ence of a Madagascan hawk moth (Xanthopan morganipraedicta) with a 12-inch proboscis was predicted in 1862 by Charles Darwin, due to the physical requirement for reaching the nectar in the Comet orchid (Angraecum sesquipedale). The insect was finally discovered and described in 1903.
I was thinking of sending the Gardeners' Chronicle to you, on account of a paper by me on the fertilisation of orchids by insects (105 2. Fertilisation of British Orchids by Insect Agency. This article in the Gardeners' Chronicle of June 9th, 1860, page 528, begins with a request that observations should be made on the manner of fertilisation in the bee-and in the fly-orchis.), as it involves a curious point, and as you cared about my paper on kidney beans but as you are so busy, I will not. I have been doing some more interesting work with orchids. Talk of adaptation in woodpeckers (106 4. Can a more striking instance of adaptation be given than that of a woodpecker for climbing trees and seizing insects in the chinks of the bark (Origin of Species, Edition HAVE I., page 141).), some of the orchids beat it.
Two botanists studied specimens from Papua Province (Irian Jaya, former Dutch New Guinea) Burret (1933) published the descriptions of eight new species of palms and named three species of different genera Mayrii. Among the 78 species of orchids listed by J. J. Smith (1934) 26 species and 2 varieties were new to science. Three of them were named Mayrii. Among 12 species of Ericaceae four were new and one was named Mayrii (J.J. Smith 1936).
Plants interact with animals in many fascinating ways. Many flowering plants attract pollinators, animals that carry pollen from one plant to another. Usually the pollinator gets a reward for its efforts in the form of food from nectar. The size, shape, color, and odor of many flowers make them attractive to their pollinators. For example, Figure 27-9 shows that in some orchid species, the flowers have evolved to look and smell like the female of their wasp or bee pollinators. A male wasp or bee lands on a flower believing he has located a mate. The pollen he touches sticks to his body and is transferred to the next orchid he visits. In this case, the flower lures the pollinator with the promise of a mate, but fools the insect into picking up pollen without receiving a reward. Some orchid species have evolved to resemble their wasp or bee pollinators. Some orchid species have evolved to resemble their wasp or bee pollinators.
Talley NJ, Janssens J, Lauritsen K, Racz I, Bolling-Sternevald E. Eradication of Helicobacter pylori in functional dyspepsia randomized double blind placebo controlled trial with 12 months' follow up. The Optimal Regimen Cures Helicobacter Induced Dyspepsia (ORCHID) Study Group. BMJ 1999 318 833-837.
Orchid The Orchid ASR is a manual procedure that features gel-based detection of sequence-specific primer (SSP) ampli-cons. Although the amplifications are multiplexed, samples from each patient are loaded into several gel lanes and, as such,this closed platform may be best suited for lower-test-volume laboratories.
The theory of natural selection would never have replaced the doctrine of divine creation if evident, admirable design pervaded all organisms. Charles Darwin understood this, and he focused on features that would be out of place in a world constructed by perfect wisdom. Darwin even wrote an entire book on orchids to argue that the structures evolved to ensure fertilization by insects are jerry-built of available parts used by ancestors for other purposes. Orchids are Rube Goldberg machines a perfect engineer would certainly have come up with something better. This principle remains true today. The best illustrations of adaptation by evolution are the ones that strike our intuition as peculiar or bizarre.
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