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单词 Scaldweed
释义

Scaldweed

英语百科

Cuscuta

Cuscuta europaea in flower
Cuscuta on Acacia in Punjab, Pakistan
Diagram illustrating how Cuscuta uses haustoria to penetrate the vascular system of its host plant and remove sugars and nutrients from the host's phloem.  1). Cuscuta plant  2). Host plant 3). Cuscuta leaves  4). Ground tissue  5). Phloem  6). Sugars and nutrients  7). Epidermal tissue  8). A Cuscuta haustorium growing into the phloem of the host plant.

Cuscuta (pronunciation: /kʌsˈkjutɑː/) (dodder) is a genus of about 100–170 species of yellow, orange, or red (rarely green) parasitic plants. Formerly treated as the only genus in the family Cuscutaceae, it now is accepted as belonging in the morning glory family, Convolvulaceae, on the basis of the work of the Angiosperm Phylogeny Group. The genus is found throughout the temperate and tropical regions of the world, with the greatest species diversity in subtropical and tropical regions; the genus becomes rare in cool temperate climates, with only four species native to northern Europe.

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