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・ Helicin
・ Helicina
・ Helicina aspersa
・ Helicina fasciata
・ Helicina guppyi
・ Helicina orbiculata
・ Helicina platychila
・ Helicina rhodostoma
・ Helicina rostrata
・ Helicine arteries
・ Helicine arteries of penis
・ Helicinidae
・ Helianthus pauciflorus
・ Helianthus petiolaris
・ Helianthus porteri
Helianthus praecox
・ Helianthus praetermissus
・ Helianthus pumilus
・ Helianthus radula
・ Helianthus resinosus
・ Helianthus salicifolius
・ Helianthus sarmentosus
・ Helianthus schweinitzii
・ Helianthus silphioides
・ Helianthus simulans
・ Helianthus smithii
・ Helianthus speciosus
・ Helianthus × laetiflorus
・ Helianthushof
・ Helias


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Helianthus praecox : ウィキペディア英語版
Helianthus praecox

''Helianthus praecox'' is a North American species of sunflower known by the common name Texas sunflower. It is endemic to Texas. Most of the populations are either along the Gulf Coast or in the Río Grande Valley.〔(Biota of North America Program 2014 county distribution map )〕
''Helianthus praecox'' grows on sandy soils and coastal prairies. It is an annual herb up to 150 cm (60 inches or 5 feet) tall. One plant usually produces 1-3 flower heads, each containing 11-16 yellow ray florets surrounding 35 or more red or purple disc florets.〔(Flora of North America, Helianthus praecox Engelmann & A. Gray, 1847. Texas sunflower )〕
;Subspecies〔〔〔(Billie L. Turner. 2014. Taxonomy of the Texas sunflower ''(Helianthus praecox)'' Asteraceae. Phytologia (April 1, 2014) 96(2) 107 ) includes county-level range map for all 3 subspecies〕
*''Helianthus praecox'' subsp. ''hirtus'' (Heiser) Heiser - near Carrizo Springs in Dimmit County
*''Helianthus praecox'' subsp. ''praecox'' - sandy soils along the coast in Galveston County + Brazoria County
*''Helianthus praecox'' subsp. ''runyonii'' (Heiser) Heiser - Coastal prairies (from Calhoun County to Cameron County) and Río Grande Valley (from Webb County to Cameron County)
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Helianthus praecox」の詳細全文を読む



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