seasonal expression
| Firth Author | Year | Full citation | Keywords |
|---|---|---|---|
| Allard | 1945 | Allard H.A., 1945. Flowering Behavior and Natural Distribution of the Eastern Ragweeds (Ambrosia) as Affected by Length of Day. Ecology 26(4):387-394 |
flowering behavior, inflorescence, seasonal expression, Ambrosia trifida, Ambrosia artemisiifolia |