| 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). |
