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- Q17077910 subject Q4056905.
- Q17077910 subject Q6506295.
- Q17077910 subject Q8543757.
- Q17077910 abstract "Herbchronology is the analysis of annual growth rings (or simply annual rings) in the secondary root xylem of perennial herbaceous plants. While leaves and stems of perennial herbs die down at the end of the growing season the root often persists for many years or even the entire life. Perennial herb species belonging to the dicotyledon group (also known as perennial forbs) are characterized by secondary growth, which shows as a new growth ring added each year to persistent roots. About two thirds of all perennial dicotyledonous herb species with a persistent root that grow in the strongly seasonal zone of the northern hemisphere show at least fairly clear annual growth rings.Counting of annual growth rings can be used to determine the age of a perennial herb similarly as it is done in trees using dendrochronology. This way it was found that some perennial herbs live up to 50 years and more.".
- Q17077910 thumbnail Root_cross-section_of_Penstemon_venustus.jpg?width=300.
- Q17077910 wikiPageExternalLink herbchronology.
- Q17077910 wikiPageExternalLink xylemdb.
- Q17077910 wikiPageWikiLink Q1098652.
- Q17077910 wikiPageWikiLink Q1209966.
- Q17077910 wikiPageWikiLink Q122811.
- Q17077910 wikiPageWikiLink Q1387972.
- Q17077910 wikiPageWikiLink Q157957.
- Q17077910 wikiPageWikiLink Q190903.
- Q17077910 wikiPageWikiLink Q287.
- Q17077910 wikiPageWikiLink Q369429.
- Q17077910 wikiPageWikiLink Q4056905.
- Q17077910 wikiPageWikiLink Q5467207.
- Q17077910 wikiPageWikiLink Q5608096.
- Q17077910 wikiPageWikiLink Q6059580.
- Q17077910 wikiPageWikiLink Q6506295.
- Q17077910 wikiPageWikiLink Q80205.
- Q17077910 wikiPageWikiLink Q8316.
- Q17077910 wikiPageWikiLink Q8543757.
- Q17077910 wikiPageWikiLink Q987768.
- Q17077910 comment "Herbchronology is the analysis of annual growth rings (or simply annual rings) in the secondary root xylem of perennial herbaceous plants. While leaves and stems of perennial herbs die down at the end of the growing season the root often persists for many years or even the entire life. Perennial herb species belonging to the dicotyledon group (also known as perennial forbs) are characterized by secondary growth, which shows as a new growth ring added each year to persistent roots.".
- Q17077910 label "Herbchronology".
- Q17077910 depiction Root_cross-section_of_Penstemon_venustus.jpg.