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Lactuca graminifolia : ウィキペディア英語版 | Lactuca graminifolia
''Lactuca graminifolia'', the grassleaf lettuce is a North American species of wild lettuce. It grows in Mexico, Central America, Hispaniola, and the southern United States from Arizona to Florida, Virginia and the Carolinas.〔(Biota of North America Program 2014 county distribution map )〕〔(SEINet, Southwestern Biodiversity, Arizona chapter, ''Lactuca graminifolia'' Michx. )〕〔(Tropicos, specimen listing for ''Lactuca graminifolia'' Michx. )〕〔Nash, D. L. 1976. Tribe XI, Cichorieae. En Nash, D.L. & Williams, L.O. (eds), Flora of Guatemala - Part XII. Fieldiana, Botany. 24(12): 440–454, 598–603〕〔Breedlove, D.E. 1986. Flora de Chiapas. Listados Florísticos de México 4: i–v, 1–246〕 ''Lactuca graminifolia'' is a biennial herb in the dandelion tribe within the daisy family growing from a taproot a height of up to 150 cm (5 feet). The top of the stem bears a multibranched inflorescence with many flower heads. Each head contains 15-20 blue or purple ray florets but no disc florets. The fruit is a brown achene.〔(Flora of North America, ''Lactuca graminifolia'' Michaux, 1803. )〕 == References ==
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