cactus
TRANSCRIPT
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Cactus
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Cactus: A origem do nome
• O termo 'cactos' foi usado há cerca de 300 anos a.C pelo grego Teofrastus. Em seu trabalho chamado Historia Plantarum, ele associa o nome cacto à plantas com fortes espinhos. Embora os cactos possam ter formas diversas, ainda hoje associamos a idéia de que são plantas com muitos espinhos.
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ARROZ-DE-RATOSedun morganianum
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Babosa bravaAloe ferox
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Todos os cactos florescem, porém algumas espécies só dão flores após os 80 anos de idade ou atingir altura superior a dois metros. Depois da primeira floração, todo ano, na mesma época, as flores voltam a aparecer.
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Barril-de anzolFerocactus horridus
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Barril douradoEchinocactus grusonii
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Cactos podem viver até 200 anos e alcançar 20 metros de altura (como o Cornegia gigantea, originário dos EUA e México). Mas também existem espécies minúsculas. A menor conhecida é o Blosfeldia liliputana, dos Andes bolivianos, com apenas 0,5 centímetros de diâmetro.
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Barril grandeEchinocactus grandis
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Capuz-de-mongeAstrophytun ornatum
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• No mundo, existem mais de duas mil espécies de cactos catalogadas. Só no Brasil, são mais de 300 tipos.
• Algumas espécies dão frutos comestíveis. É o caso do cacto mexicano Opuntia Ficus-indica, que produz o conhecido figo-da-índia.
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Chapéu-de-padreAstrophytum myriostigma
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EstapéliaStapelia gigantea
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Pilosocereus palmieri (Rose)
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• Os espinhos são uma característica marcante dos cactos. Na verdade, eles representam folhas que se reduziram no processo de evolução dessa planta. Essa é uma outra maneira de reduzir a perda de água, porque sem as folhas eles evitam ainda mais a transpiração. Os espinhos também protegem o cacto contra predadores
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Eufórbia amarelaEuphorbia virosa
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Figo-da-IndiaOpuntia ficus indica
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Flor-de-maioEpiphyllum hybridus
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Flor-de-maio miúdaRhipsalidopsis gaertneri
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Opuntia bigelowii. Eng
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Ginocalício de tucumãGymnocalycium saglionis
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Ginocalício ótimoGymnocalycium optima rubra
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HuérniaHuernia schneideriana
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Língua de boiGasteria verrucosa
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Mamilária-compridaMammillaria elongata
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Mamilária geminadaMammillaria geminispina
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Mamilária lanosaMammillaria hahniana
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Musgo-de-solCrassula lycopodioides
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Opúncia comumOpuntia vulgaris
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Rabo de rato mexicanoAporocactus flagelliformis
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RochéiaRochea odoratissima
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Rosa da pedraEcheveria sp.
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Roseta gigante (Eônio)Aeonium canariense
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Sisal-vitóriaAgave Victoriae reginae
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Tuna monstruosaCereus peruvianus monstruosus
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Cereus jamacaru
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João FelixTécnico em Agropecuária