Results 141 to 150 of about 5,196 (177)
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SEEDS AND EMBRYOS OF ARAUCARIA MIRABILIS
American Journal of Botany, 1975Seeds and embryos contained within the silicified ovuliferous cone Araucaria mirabilis from the Cerro Cuadrado petrified forest are described. One wingless seed, 0.8–1.3 cm in length and 0.2–0.6 cm in width, is embedded in each ovuliferous scale. Seeds show a three‐layered integument and a prominent wavy nucellus which is attached basally to the ...
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Carbohydrate Research, 1965
Abstract The polysaccharide exudate from the gymnosperm, Araucaria bidwilli, contains residues of d -galactose, l -arabinose, l -rhamnose, and d -glucuronic acid (in part as the 4-methyl ether). Graded hydrolysis affords 6-O-(β- d -glucopyranosyluronic acid)- d -galactose and 6-O-(4-O-methyl-β- d -glucopyranosyluronic acid)- d -galactose.
G.O. Aspinall, R.M. Fairweather
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Abstract The polysaccharide exudate from the gymnosperm, Araucaria bidwilli, contains residues of d -galactose, l -arabinose, l -rhamnose, and d -glucuronic acid (in part as the 4-methyl ether). Graded hydrolysis affords 6-O-(β- d -glucopyranosyluronic acid)- d -galactose and 6-O-(4-O-methyl-β- d -glucopyranosyluronic acid)- d -galactose.
G.O. Aspinall, R.M. Fairweather
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Shuffle of words and araucaria trees
Fundam. Informaticae, 2006Summary: The shuffle of \(k\) words \(u_1,\dots,u_k\) is the set of words obtained by interleaving the letters of these words such that the order of appearance of all letters of each word is respected. The study of the shuffle product of words leads to the construction of an automaton whose structure is deeply connected to a family of trees which we ...
René Schott, Jean-Claude Spehner
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Populations of dwarf araucaria (Araucaria araucana) in the Nahuelbuta coastal range, Chile
2008Araucaria araucana (araucaria or pehuén) can normally reach > 20 m in height in most sites where it grows. However, two dwarf populations of A. Araucana were found at the top of the Nahuelbuta coastal range. This study had the goal of characterizing the structure, composition, ages and chemical and physical soil properties of both populations. These
Donoso, Claudio +5 more
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Cold spot microrefugia hold the key to survival for Brazil's Critically Endangered Araucaria tree
Global Change Biology, 2019Francis E Mayle +2 more
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