Conyza canadensis




Family Asteraceae (alt. Compositae)
Scientific name Conyza canadensis (L.) Cronquist
Synonyms Aster canadensis (L.) E. H. L. Krause; Conyza bilbaoana Remy; Conyza canadensis (L.) Cronquist var. glabrata (A. Gray) Cronquist; Conyza canadensis (L.) Cronquist var. pusilla (Nuttall) Cronquist; Conyza myriocephala Remy; Conyza parva Cronquist; Conyzella canadensis (L.) Ruprecht; Erigeron canadensis L.; Erigeron canadensis L. forma coloratus Fassett; Erigeron canadensis L. var. glabratus A. Gray; Erigeron canadensis L. var. pusillus (Nuttall) B. Boivin; Erigeron paniculatus Lamarck; Erigeron pusillus Nuttall; Erigeron ruderale Salisbury; Erigeron setiferus Post ex Boissier; Leptilon canadense (L.) Britton; Leptilon canadense (L.) Britton var. pusillum (Nuttall) Daniels; Leptilon pusillum (Nuttall) Britton; Marsea canadensis (L.) V. M. Badillo; Tessenia canadensis (L.) Bubani
Common name (Japanese common name) hime-mukashi-yomogi [dwarf old mugwort]
(English common name) butterweed, Canadian horseweed, Canadian-fleabane, hogweed, horseweed
Distribution (Japan) Hokkaido, Honshu, Shikoku, Kyushu, Okinawa
(Other nations) [native] Canada, USA, Mexico, El Salvador, Guatemala, Honduras, Nicaragua, Belize, Costa Rica, Panama
Chromosomal number 2n=18
Description Plants 80-180cm. Leaves 7-10cm length, 0.5-1.5cm width. Flowers head ca. 3mm, flowering in July to November. Annual or winter annual plants.
Reference Conyza canadensis (L.) Cronquist
Conyza canadensis (L.) Cronquist
Conyza canadensis (Linnaeus) Cronquist
Conyza canadensis (L.) Cron.
Note Naturalized plants (introduced in mid 19th).



August 2007 at open field August 2007 at open field August 2007 at open field



August 2007 at open field August 2007 at open field