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'' Pittocaulon'' is a genus of Mexican shrubs and small trees in the groundsel tribe within the sunflower family.〔(Robinson, Harold Ernest & Brettell, R. D. 1973. Phytologia 26(6): 451–453 ) descriptions in Latin, commentary in English〕〔(Tropicos, ''Pittocaulon'' H.Rob. & Brettell )〕 ''Pittocaulon'' is native to the dry parts of central and southern Mexico. In addition to the strange appearance of these plants, ''Pittocaulon'' is of interest due to the remarkable range of habitats in which the species occur, from dry highland scrub well above 3000 meters, to tropical dry forest in hot country as low as 300 meters and on rocks, often in very steep situations. ''Pittocaulon'' species are conspicuous when they flower at the end of the dry season are popularly called "palo loco" or "crazy tree", because they flower at the very end of the dry season when most other plants are suffering the effects of drought. ;Species〔(Flann, C (ed) 2009+ Global Compositae Checklist )〕〔Davidse, G., M. Sousa-Peña, S. Knapp & F. Chiang Cabrera. 2015. In G. Davidse, M. Sousa Sánchez, S. Knapp & F. Chiang Cabrera (eds.) Flora Mesoamericana. Universidad Nacional Autónoma de México, México D.F..〕 # ''Pittocaulon bombycophole'' (Bullock) H.Rob. & Brettell - Guerrero, México State # ''Pittocaulon filare'' (McVaugh) H.Rob. & Brettell - Colima # ''Pittocaulon hintonii'' H.Rob. & Brettell - Michoacán # ''Pittocaulon velatum'' (Greenm.) H.Rob. & Brettell - Guerrero, Nayarit, Oaxaca, Zacatecas ;formerly included〔 see ''Roldana Senecio'' *''Pittocaulon calzadanum'' B.L.Turner - ''Roldana eriophylla'' (Greenm.) H.Rob. & Brettell *''Pittocaulon praecox'' (Cav.) H.Rob. & Brettell - ''Senecio praecox'' (Cav.) DC. ==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「Pittocaulon」の詳細全文を読む スポンサード リンク
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