Andreaea | |
---|---|
Andreaea rupestris | |
Scientific classification ![]() | |
Kingdom: | Plantae |
Division: | Bryophyta |
Class: | Andreaeopsida |
Order: | Andreaeales |
Family: | Andreaeaceae Dumort. |
Genus: | Andreaea Hedw. |
Andreaea is a genus of rock mosses described by Johann Hedwig in 1801. [1] [2] [3]
They are small, delicate acrocarpous mosses (meaning that the capsules are formed at the tips of vertical branches) that form dark brown or reddish cushions on wet siliceous rocks in mountainous areas. The capsule lacks the peristome teeth and operculum of other mosses, and opens by splitting along 4 vertical slits, the four valves remaining joined at the base and apex. The capsule of Andreaea has no seta, but the sporophyte (Spf in the diagram below) instead is supported by a pseudopodium (ps) derived from gametophyte tissue, as in Sphagnum and the columella is enclosed within the sporangium. The spores germinate to give thalloid protonemata. [4] [5] [6] [7] [8]
In alphabetical order: [9]
Tierra del Fuego is an archipelago off the southernmost tip of the South American mainland, across the Strait of Magellan. The archipelago consists of the main island, Isla Grande de Tierra del Fuego, with an area of 48,100 km2 (18,572 sq mi), and a group of many islands, including Cape Horn and Diego Ramírez Islands. Tierra del Fuego is divided between Chile and Argentina, with the latter controlling the eastern half of the main island and the former the western half plus the islands south of Beagle Channel. The southernmost extent of the archipelago is at about latitude 55 S.
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Tierra del Fuego is the southernmost and least populous Argentine province.
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Fuegians are one of the three tribes of indigenous inhabitants of Tierra del Fuego, at the southern tip of South America. In English, the term originally referred to the Yaghan people of Tierra del Fuego. In Spanish, the term fueguino can refer to any person from the archipelago.
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The Boundary Treaty of 1881 between Argentina and Chile was signed on the 23 July 1881 in Buenos Aires by Bernardo de Irigoyen, on the part of Argentina, and Francisco de Borja Echeverría, on the part of Chile, with the aim of establishing a precise and exact borderline between the two countries based on the uti possidetis juris principle. Despite dividing largely unexplored lands, the treaty laid the groundwork for nearly all of Chile's and Argentina's current 5600 km shared border.
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The Flora Antarctica or formally and correctly The Botany of the Antarctic Voyage of H.M. Discovery Ships Erebus and Terror in the years 1839–1843, under the Command of Captain Sir James Clark Ross, is a description of the many plants discovered on the Ross expedition, which visited islands off the coast of the Antarctic continent, with a summary of the expedition itself, written by Joseph Dalton Hooker and published in parts between 1844 and 1859 by Reeve Brothers in London. Hooker sailed on HMS Erebus as assistant surgeon.
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