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Araucaria araucana, commonly called the monkey puzzle tree, monkey tail tree, piñonero, pewen or pehuen pine, is an evergreen tree growing to a trunk diameter of 1–1.5 m (3.3–4.9 ft) and a height of 30–40 m (98–131 ft).
Crossword-like puzzles, for example Double Diamond Puzzles, appeared in the magazine St. Nicholas, published since 1873. [32] Another crossword puzzle appeared on September 14, 1890, in the Italian magazine Il Secolo Illustrato della Domenica. It was designed by Giuseppe Airoldi and titled "Per passare il tempo" ("To pass the time"). Airoldi's ...
Edward Hitchcock's fold-out paleontological chart in his 1840 Elementary Geology. Although tree-like diagrams have long been used to organise knowledge, and although branching diagrams known as claves ("keys") were omnipresent in eighteenth-century natural history, it appears that the earliest tree diagram of natural order was the 1801 "Arbre botanique" (Botanical Tree) of the French ...
Araucaria are mainly large trees with a massive erect stem, reaching a height of 5–80 metres (16–262 ft). The horizontal, spreading branches grow in whorls and are covered with leathery or needle-like leaves. In some species, the leaves are narrow, awl-shaped and lanceolate, barely overlapping each other; in others they are broad and flat ...
While branches can be nearly horizontal, vertical, or diagonal, the majority of trees have upwardly diagonal branches. A number of mathematical properties are associated with tree branchings; they are natural examples of fractal patterns in nature, and, as observed by Leonardo da Vinci , their cross-sectional areas closely follow the da Vinci ...
Prickles on a blackberry branch. In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called spinose teeth or spinose apical processes), are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally serve the same function: physically defending plants against herbivory.
Fraser recorded the development of a single white spruce tree from 1926 to 1961. Apical growth of the stem was slow from 1926 through 1936 when the tree was competing with herbs and shrubs and probably shaded by larger trees. Lateral branches began to show reduced growth and some were no longer in evidence on the 36-year-old tree.
The tree is fast growing; as much as 113 centimetres (3 + 1 ⁄ 2 ft) a year (16 m or 52 ft in 14 years) at Puerto Piray, Misiones Province, Argentina. [ 4 ] : 13_8 The leaves are thick, tough and scale like, triangular, 3–6 cm ( 1 + 1 ⁄ 8 – 2 + 3 ⁄ 8 in) long, 5–10 millimetres ( 25 ⁄ 128 – 25 ⁄ 64 in) broad at the base, and ...