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Topic: Welwitschia

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Welwitschia mirabilis

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	NamibWeb.com - The online guide to Namibia: Welwitschia Mirabilis
		The Welwitschia is endemic to the Namib desert, i.e.
		The Welwitschia is restricted to a narrow path of this desert.
		The Pforte Welwitschia is 1.2 m tall and the circumference at the base of its leafs is 8.7 m.
	www.namibweb.com /welwitschia.htm (2021 words)

	Welwitschia mirabilis
		Welwitschia is clearly not wind pollinated, as it produces smaller amounts of pollen, with the nectar to attract insects, and the flowers open in succession over an extended period, which also encourages cross-pollination.
		Welwitschia is still common in its habitat and shows variability, which is a sign that it is far from extinction.
		Welwitschia is thought to be a relic from the Jurassic period when gymnosperms dominated the world's flora, its ancestor trapped in an environment that slowly but progressively became more arid, and all its close relatives long since disappeared.
	www.plantzafrica.com /plantwxyz/welwitschia.htm (2567 words)

	California Wild Winter 2000 - Counterpoints in Science (Site not responding. Last check: 2007-10-21)
		Welwitschia leaves grow at the rate of about five inches per year throughout the life of the plant, arcing out from the thick woody stem onto the desert floor, where the tips are roasted.
		Welwitschia is found only in a fairly narrow strip of land extending from central Namibia to southern Angola.
		The secret of Welwitschia's survival is that it absorbs fog droplets through millions of tiny pores on both surfaces of its leaves, and closes the pores at about 10 a.m., when the fog burns off.
	www.calacademy.org /calwild/2000winter/stories/counterpoints.html (1470 words)

	Scenic Hills Nursery -- Oak Wilt Specialists in the Texas Hill Country
		While welwitschias are classified with cycads and pines as cone-bearing plants, they are at the same time thought to represent a link to flowering plants.
		This Welwitschia is a plant of remarkably bizarre habits and survives in very harsh localities where the annual rainfall is often less that 25 mm and where the coastal fog is equivalent to about further 50 mm.
		The Welwitschia's oldest living specimens are estimated at 1500 to 2000 years is capable of surviving severe conditions of stress.
	www.800oakwilt.com /specialtrees/welwitschia.html (1857 words)

	Welwitschia
		Welwitschia is a very odd genus of plants native to southwestern Africa, and containing only one species:
		Welwitschia is the only genus of the family Welwitschiacae, in the order Gnetales, in the class Gnetopsida.
		This is a desert plant which grows from a short, thick trunk, with only two leaves that continuously grow from their base, and a long, thick taproot.
	www.ebroadcast.com.au /lookup/encyclopedia/we/Welwitschia.html (114 words)

	A New Gnetophyte from the Late Carnian
		Welwitschia, if Archaestrobilus belongs to Pelourdea); a distinctive pith surrounded by a loose net of anastomosing and bifurcating protoxylem bundles in the inflorescence axis (this may also be a plesiomorphic character for the anthophytes); ancestral bisexual macrocupules (cf.
		Welwitschia); and monosulcate pollen with optical indications of infratectal granules (cf.
		The fact that the bracts on the sterile base of the spike(s) are borne in a tight spiral of three may be significant, inasmuch as this phyllotaxis is intermediate between spiral and whorled/paired (a synapomorphy for extant Gnetales).
	bcornet.tripod.com /Cornet96/Archaestrobilus.htm (10638 words)

	Welwitschia
		Welwitschia mirabilis in the Namib Desert of southwestern Africa.
		Welwitschias are extraordinary plants and certainly rank among the top ten list of "most bizarre plants on earth." Old, mature plants have a short, woody trunk or crown (caudex) that protrudes above the ground.
		Welwitschia plants are dioecious, with pollen-bearing and seed-bearing cones (strobili) produced on separate male and female plants.
	waynesword.palomar.edu /welwit.htm (1082 words)

	Science News: Torn to ribbons in the desert: botanists puzzle over one of earth's oddest plants - Cover Story
		The genus name Welwitschia comes from the explorer of Angola, Friedrich Welwitsch, and taxonomists have institutionalized the astonishment of the Welwitschia discoverers by settling on the species epithet mirabilis.
		Until recently, the reigning theory was that Welwitschia and its next of kin are the closest living relatives of the flowering plants, says Michael J. Donoghue of Yale University.
		He had noticed that many of the Welwitschia plants in the desert seem to be the same age.
	www.findarticles.com /p/articles/mi_m1200/is_17_160/ai_80012727 (1517 words)

	Images of Dry Tropical Habitat: Welwitschia sp. from Namibia
		This area is close to the southern limit of Welwitschia's distribution, which reaches as far north as southwestern Angola.
		Welwitschia occurs in a variety of habitats in the same general area, including open flats, rocky canyon walls, shallow drainages, and alluvial fans.
		The center of a female Welwitschia cone is a light, woody spindle- shaped structure, shown on the right.
	www.mobot.org /gradstudents/olson/welwitschia.html (340 words)

	Namibia's most versatile conservation area - Namib Naukluft Park
		Welwitschia Trail A popular feature of the Namib- Naukluft Park is the Welwitschia Trail, which lies east of Swakopmund.
		Sprawling untidily on the desert plains, the welwitschia is believed to have a lifespan of up to 2 000 years.
		While this is their most southern distribution, welwitschias occur as far north- wards as the southwestern comer of Angola.
	www.e-tourism.com.na /npnamibnaukluft.html (1555 words)

	Welwitschia mirabilis - Living Stones Nursery & Plants for the Southwest
		Welwitschia mirabilis is the only member in the family Welwitschiaceae and is one of the more bizarre plants on the planet.
		Welwitschia is the most incredible plant that he encountered.
		In cultivation, Welwitschia mirabilis used to be considered difficult, so they were mostly underwatered to prevent rot and usually died from underwatering.
	www.lithops.net /welwitschia_mirabilis_detail.htm (324 words)

	Welwitschia Mirabilis Plants in the Namib Desert
		The Welwitschia plant has only two leaves, which, over the course of the years, are frayed by the wind.
		The water, necessary for its growth, is extracted from the fog which penetrates into the desert for up to 200 days a year.
		Welwitschias grow exclusively in the central part of the Namib desert, approximately 40 to 120 kilometres from the coast.
	www.southafrica-travel.net /namibia/ewelwit.htm (155 words)

	Plant Glossary: W - EnchantedLearning.com
		Welwitschia mirabilis is an unusual, long-lived, succulent gymnosperm.
		Welwitschia produces either male or female cones (but not both).
		Welwitschia was first discovered by (and is named for) the Austrian botanist Dr. Friedrich Welwitsch in 1859.
	www.enchantedlearning.com /subjects/plants/glossary/indexw.shtml (550 words)

	Welwitschia FAQ
		Welwitschia Flats, where what appear to be hundreds of plants crouch, stretching out to the horizon).
		Subject: Welwitschia references Paul, There was a detailed thread on Welwitschia last year, sometime in the late winter or early spring.
		Date: Wed, 12 Apr 1995 19:07:32 -0700 From: CAdastra@aol.com Subject: Re: Welwitschia A very knowledgeable friend of mine, an excellent grower of many genera in addition to succulents, potted his Welwitschia in a drainage pipe that was in turn potted in a clay pot - a makeshift very deep pot.
	www.alamut.com /subj/property/longevity/welwitschiaFAQ.html (2217 words)

	Welwitschia 1 (2) 1998 EN (Site not responding. Last check: 2007-10-21)
		Welwitschia 1 (2) 1998 EN Huernia zebrina subsp.
		The primary dye is chlorophyl, however, the colour may be further influenced by the proportion of bethanine dyes and by the presence if epidermal waxes.
		Because of the magnificent name and since I was interested in growing the plant adored by dr. Welwitsch, I sowed the seeds in pots made of plastic bottles with the necks cut off.
	www2.arnes.si /~sspimule/dpks/1998-2/E1998-2.htm (1306 words)

	Namibia 2001 Page 27
		Here you see the two cotyledons, which are the primary leaves or seed leaves, and the two real leaves.
		Welwitschia can get very old, some publications mentioning ages of 2000 years and over.
		This specimen, at the end of the Welwitschia Drive, is said to be 1500 years.
	allserv.rug.ac.be /~dvcammen/Namibia2001/Nam2001_27.htm (197 words)

	WORLD magazine: Amazing Facts @ nationalgeographic.com (Site not responding. Last check: 2007-10-21)
		It’s the odd Welwitschia (well-WITCH-ee-a) plant, which grows in desert areas of Namibia and Angola, two countries in Africa.
		The Welwitschia has only two leaves that shred into many long, leathery pieces as they grow.
		Welwitschias provide shelter for small desert animals and are an important part of the web of life in the desert.
	www.nationalgeographic.com /media/world/amfacts/amaz7.html (68 words)

	Swakopmund
		The Trail of the same name pass the lunar landscape, ancient lichens as well as various other points of interest and ends at oldest and the biggest Welwitschia specimen in the middle of the desert.
		The Welwitschias are known as a result of of their age (1000 till 2000 years) as living fossils and was named after your discoverer, the Austrian botanist Dr. Friedrich Welwitsch.
		One finds the Welwitschias from which there are male and feminine species, spread all over the plain on both sides of the street.
	www.namibia2003.de /html/swakopmund_e.html (531 words)

	Torn to Ribbons in the Desert: Science News Online, Oct. 27, 2001 (Site not responding. Last check: 2007-10-21)
		Darwin was fascinated when he learned of Welwitschia and its extraordinary mixture of advanced and primitive characteristics and called it "the vegetable Ornithorhynchus," the platypus of the plant world.
		New York, N.Y. In your article on Welwitschia mirabilis, you state that "botanists have classified it with conifers." On the contrary, botanists classify it in the phylum Gnetophyta, along with Gnetum and Ephedra, rather than in the phylum Coniferophyta.
		The text of the story itself, however, was clearer in dealing with classification at a much broader level, placing "the species with the gymnosperms, the broad group that includes conifers.
	www.sciencenews.org /articles/20011027/bob12.asp (2873 words)

	Fred. Olsen Cruise Lines \| Excursion \| Walvis Bay, Namibia \| WELWITSCHIA PLAINS & MOON LANDSCAPE
		Highlights in the northern section are the Welwitschia Plains and the Moon Landscape.
		On the Welwitschia Plains we’ll see the Welwitschia Mirabilis, a botanical curiosity endemic to the Namib Desert and certainly one of the most intriguing and bizarre plants on earth.
		Sprawling untidily on the desert plains, the welwitschia is believed to have a lifespan of up to 2,000 years.
	www.fredolsencruises.co.uk /fredolsen/process/shoretours/shoretour_detail/id=1072,portcode_id=542.html (404 words)

	DFT Vascular Plant Image Library (Welwitschiaceae)
		Welwitschia mirabilis - - Native, from Namib Desert (habitat) - photo: Thomas Schöpke
		Welwitschia mirabilis - - Native, from Namib Desert (male and female between petrified wood) - photo: Thomas Schöpke
		Welwitschia mirabilis - - Native, from Namib Desert (male) - photo: Thomas Schöpke
	www.csdl.tamu.edu /FLORA/imaxxwlw.htm (270 words)

	Welwitschiaceae and Welwitschia mirabilis descriptions
		Its short, woody, unbranched stem is surmounted by two strap-shaped leaves that grow from a basal meristem throughout the life of the plant, becoming twisted and frayed with the passing centuries.
		The leaves contain numerous subparallel veins that may anastomose or terminate blindly in the mesophyll (this character, again, is unique in Welwitschia among the gymnosperms).
		The woody stem widens with age to become a concave disc up to a meter across, from which grow small ramified branch systems that serve only to bear pollen and seed cones (6).
	www.biologie.uni-hamburg.de /b-online/earle/we/welwitschiaceae.htm (626 words)

	Plants - Welwitschia, Quiver trees, Baobab, Namibia
		The Welwitschia mirabilis is a very special plant that is only growing in this area and nowhere else on the whole world.
		Two people discovered this funny plant almost at the same time, but the Austrian Friedrich Welwitschia was a little faster, so he got to name it.
		Welwitschias grow exclusively in the central part of the Namib desert, approximately 40 to 120 km from the coast.
	www.virtualtourist.com /travel/Africa/Namibia/Things_To_Do-Namibia-Plants_Welwitschia_Quiver_trees_Baobab-BR-1.html (1669 words)

	Welwitschia mirabilis: a plant from Tatooine? (Site not responding. Last check: 2007-10-21)
		The microtubule, on the right, provides a direct contact to the exterior and is evident extending into the seed proper as a fine line above the central seed area and ending at the upper edge of the seed in the center of the broad wing.
		The process of growing Welwitschia from seed to seed, in our case took about 13 years and was published in 1980 by Leo C. Song, Jr.
		That is, under extreme drought stress, Welwitschia closes its stomates and refixes respiratory carbon dioxide, produced at night, trapped in the intercelluar spaces during the daylight.
	biology.fullerton.edu /facilities/greenhouse/stories_out_of_school/welwitschia_mirabilis__ap.html (1392 words)

	Welwitschiaceae from the Lower Cretaceous of northeastern Brazil -- Dilcher et al. 92 (8): 1294 -- American Journal of ...
		Hooker J. 1863 On Welwitschia a new genus of Gnetaceae.
		Sykes M. 1910 On the anatomy of Welwitschia mirabilis in its seedling and adult stages.
		Sykes M. 1911 The anatomy and morphology of the leaves and inflorescences of Welwitschia mirabilis.
	www.amjbot.org /cgi/content/full/92/8/1294 (7042 words)

	Welwitschia plant, Namibia
		The Welwitschia mirabilis plant (oftn mis-spelled Welwitchia) has only two leaves and can live for over a thousand years.
		The easiest place to see it in Namibia is "Welwitschia Drive", inland from Swakopmund.
		Once on Welwitschia drive keep a look-out for the plants, some large examples of which are near the road, surrounded by circles of large stones.
	www.v-liz.com /namibia/welwit.htm (251 words)

	BGBM: Greenhouses-House A
		Besides the old and young Welwitschia plants in the display glasshouse, thirteen plants of old stock are growing in the Welwitschia house in the nursery (not open to the public for reasons of limited space).
		However, the lack of exact documentation of origin of the plants of the old and presumably heterogeneous stock was a major impediment for a systematic approach to such a study.
		The observations suggested that the old Welwitschia stock at Berlin-Dahlem was composed of two groups of plants, provisionally denominated as "group 1" and "group 2".
	www.bgbm.fu-berlin.de /BGBM/garden/bereiche/areas/welwitsh2.htm (389 words)

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