Angiosperm Systematics

Angiosperm Systematics - Papaveraceae (poppies from which...

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Angiosperm Systematics The flowering plants, the division Magnoliophyta, contain more than 235,000 species, six times the number of species of all other plants combined. The flowering plants divide into two large groups, informally named the monocots and the dicots. The techjnical names for these groups are the class Magnoliopsida for dicots and the class Liliopsida for monocots. The dicotyledons are in the class Magnoliopsida and have these features: either woody or herbaceous, flower parts usually in fours and fives, leaves usually net-veined, vascular bundles arranged in a circle within the stem, and produce two cotyledons (seed leaves) at germination. Prominent dicot families include the mustards, maples, cacti, peas and roses. Several dicot families are noteworthy because of the illegal drugs (shown in Figure 12) derived from them: the Cannabinaceae (marijuana) and
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Unformatted text preview: Papaveraceae (poppies from which opium and heroin are derived). Erythroxylum coca (in the dicot family Erythroxylaceae) is the plant from which the illegal drug cocaine is extracted. Not all dicot plants are misused to produce illegal drugs. Notable dicot families with legitimate uses include the pea family, which includes the crop plants beans, clover, and peas as well as many ornamental landscape plants such as Acacias. Beans are an excellent source of nonanimal protein as well as fiber. Another dicot of enormous use is cotton, Gossypium , shown in Figure 13. Chocolate and cola are products of the plant family Sterculiaceae. Coffee is produced from Coffea arabica , a plant in the family Rubiaceae, while tea comes from Camelia sinensis (Theaceae), a plant native to China....
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This note was uploaded on 11/29/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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Angiosperm Systematics - Papaveraceae (poppies from which...

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