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・ Mentz Church
・ Mentz Schulerud
・ Mentz, New York
・ Mentzel Baltic Fox
・ Mentzelia
・ Mentzelia affinis
・ Mentzelia albicaulis
・ Mentzelia chrysantha
・ Mentzelia congesta
・ Mentzelia crocea
・ Mentzelia densa
・ Mentzelia dispersa
・ Mentzelia eremophila
・ Mentzelia goodrichii
・ Mentzelia gracilenta
Mentzelia involucrata
・ Mentzelia laevicaulis
・ Mentzelia leucophylla
・ Mentzelia lindleyi
・ Mentzelia micrantha
・ Mentzelia mollis
・ Mentzelia montana
・ Mentzelia multiflora
・ Mentzelia nitens
・ Mentzelia oreophila
・ Mentzelia packardiae
・ Mentzelia pectinata
・ Mentzelia polita
・ Mentzelia pumila
・ Mentzelia reflexa


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Mentzelia involucrata : ウィキペディア英語版
Mentzelia involucrata

''Mentzelia involucrata'' is a species of ''Mentzelia'' native to the Mojave and Sonoran deserts of North America. Its common names include sand blazing star and white-bract blazing star.
==Description==
''Mentzelia involucrata'' is an annual plant growing to a height of 7–35 cm, with larger leaves forming a basal rosette, and smaller leaves along the stem. The leaves are between 2 and 18 cm long, with an irregularly toothed margin.
The flowers are generally borne singly, and subtended by 4–5 bracts; they have five sepals 7–23 mm long and five cream-yellow petals 13–62 mm long. The fruit is 14–22 mm long and 5–10 mm wide, and contains rough ash-white seeds that are 2–3 mm long. The bracts of this species are distinctive in that they are almost entirely white, with a green border.
''Mentzelia involucrata'' is of interest because it is involved in a competition for pollinators that has resulted in mimicry. It produces nectar to attract bees of the genus ''Xeralictus''. In areas where their range overlaps, ''Mohavea confertiflora'' (Ghost Flower), which does not produce nectar, has adapted a morphology resembling ''Mentzelia involucrata''. Recent studies have suggested that in addition to mimicry of ''M. involucrata'', ''Mohavea confertiflora'' flowers contain marks that resemble female ''Xeralictus'', to attract male bees that would otherwise ignore the flowers().

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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