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Rødgran

Rødgran (Picea abies) et stedsegrønt grantræ, der kan blive op til 40 meter højt. Rødgran er en almindelig udbredt art i Danmark, især i Jylland. De kan som sagt blive op til 40 meter højt, men de bliver ofte 30 meter på god lerjord og 20 meter på sandjord. Kronen er kegleformet, så det ligner et juletræ. Rødgran har fået sit navn grundet de unge træers rødbrune bark og skud. På ældre træer bliver stammen grålig og barken skaller af. Rødgran dækker omkring 33% af Danmarks skoveareal.

Rødgranens rødder danner mykorriza, der hjælper træet med at optage næringsstoffer og vand. Rødgran vokser forholdsvis hurtigt, og dens træ bliver ofte brugt i skovbruget, da den vokser meget lige, og den har ikke brug for gødning eller tilsatte næringsstoffer, og kan vokse selvom jorden ikke er så næringsrig.  

Rødgran blomstrer først når den er omkring 35 år gammel. Her vil hunblomsterne vokse i toppen af træet, og hanblomsterne vokse i midterste/nederste del af træet. Det at der både er hun og hanblomster på samme træ, kaldes enbo. Både hun og hanblomsterne sidder placeret som små røde

blomsterstande, som ligner runde kogler. Forskellen på hun og han blomster er dog, at hunblomsterne er en smule større end hanblomsterne. Når rødgran blomstrer sker det ikke hvert år, men når det så sker, springer hunblomsterne ud før hanblomsterne. På den måde undgås selvbestøvning/indavl, da det nemlig er vigtigt at udveksle gener med andre individer af samme art.

Først efter bestøvningen af blomsten (som sker gennem pollen i luften), udvikler blomsterstandene sig til en grankogle.

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