Claim · model-written summary
The third prong arose after 7.6 years.
- Taxon
- American ginseng
Panax quinquefoliust0 - Outcome
- third pronge0
- Value
- 7.6 yearse0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a third prong arose after 7.6 years”
t0“AMERICAN GINSENG PANAX QUINQUEFOLIUM”
Title
POPULATION DYNAMICS OF THE AMERICAN GINSENG PANAX QUINQUEFOLIUM (ARALIACEAE)
Walter H. Lewis; Vincent E. Zenger American Journal of Botany 1982. doi:10.1002/j.1537-2197.1982.tb13397.x
Other claims from this paper (19)
- Observation The population had four morphological classes among plants aged 1–18 years.
- Observation Youngest plants had one prong and 3–5 leaflets.
- Observation Oldest plants had four prongs and up to 20 leaflets.
- Observation Age was positively correlated with prong and leaflet number.
- Observation Prong development was linear but not annual.
- Observation Two prongs formed after an average of 4.5 years.
- Observation The fourth prong arose after 13.5 years.
- Observation All one-pronged plants were juveniles.
- Observation Depending on year, 22–44% of two-pronged plants were juveniles.
- Observation Flowering became annual after inflorescence formation in the two-pronged stage.
- Observation Flower number per inflorescence correlated with class and age.
- Observation In most years, 80–89% of flowering plants formed fruit.
- Observation In 1980, 47% of flowering plants matured fruit under dry, hot conditions.
- Observation Younger adults were more susceptible than older plants to reproductive failure and earlier abscission in stressful conditions.
- Observation In 1980, 53% of flowering plants failed to fruit.
- Observation Seed survival was low and variable.
- Observation Survival after establishment and adult survivorship were high at 97%.
- Observation Reproduction, germination and aerial stem abscission varied markedly between years.
- Observation Annual growing-season dormancy was not found.