カラマス ジプロイド
Thạch xương bồ, lưỡng bội
Acorus calamus var. americanus
North American calamus, Sweet flag
No specific contraindications in available data.
The diploid chemotype contains no β-asarone, unlike the tetraploid and triploid forms. Identified by DNA sequencing (Bertea et al 2005).
However the toxicology of this oil and its major constituents remains insufficiently studied.
| Shyobunones | 13.0 – 45.0 % |
| Acorenone | 9.0 – 13.0 % |
| Preisocalamendiol | 7.0 – 12.0 % |
| Acorone + Isoacarone | 8.0 – 10.0 % |
| Isocalamendiol | 2.0 – 3.0 % |
| β-Sesquiphellandrene | 0 – 3.0 % |
| Calamendiol | 1.0 % |
| α-Cadinol | 1.0 % |
| δ-Cadinene | 1.0 % |
The diploid form of Acorus calamus occurs in North America and Siberia. This is the only cytotype of the species free of β-asarone, the carcinogen flagged in the other forms.
Family Araceae. Var. americanus per Raf. classification.
This form is rare in commercial trade.