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Help me with these Red pine parts?

last year

Pinus resinosa.

Reproductive parts, I just don't understand why there are 3 different kinds.

#1) These are on the lower 1/3 of the tree, I believe they are 'pollen sacks'. They are where the new growth meets the old growth. Documentation says pollen sack are higher on the tree than the seed cones, I don't see that on my trees.

#2) Female seed cones. Immature cones. Located where the new growth meets the old growth.

#3) Okay, these are on the branch tips on the new growth, high on the tree.

What are they? I know it takes 2 years for the seed cones to mature. Are these the next round of seed cones? Does the tree produce new seed cones every year?

Featured Answer

bengz6westmd

last year

Yeah, you've got this yrs' new cones, and last yrs' 1-year old not-yet-mature cones. New cones are produced each year.

Comments (7)

ken_adrian Adrian MI cold Z5
last year
last modified: last year
first pic is pollen sacs isnt it?

gently blow on it on the right day. and youll see

ken

ps: and i believe pollen is the boy..and the cone is the girl ... ergo.. at lest 2 parts ...
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BillMN-z-2-3-4
Original Author
last year
Thanks Ben for confirming that. That would make sense. Those immature cones from last year should be ripe and full of seed by Fall and those tiny ones at the tips of the new growth will be the new immature cones next spring. Brilliant! :-)
plantkiller_il_5
last year
last modified: last year
Female flowers are always higher in tree than male sacs so there is less chance of self fertilizing . And no , not all cone will have seeds,,,some just don't get fertilized

ron
BillMN-z-2-3-4 thanked plantkiller_il_5
BillMN-z-2-3-4
Original Author
last year
'Female flowers are always higher in tree than male sacs so there is less chance of self fertilizing'

Now that makes sense. ;-)

My Red pines have been getting cones since they were about 3-4 years old but they were a little more sporadic doing so than now at >7 yo.
bengz6westmd
last year
Some conifers can have cones of many ages, Table Mountain pine in my yard still has old cones on its trunk from maybe 10 yrs ago. Virginia pine also keeps old cones many years. Read that some stay closed for many years only to open during/after a fire to re-seed..
BillMN-z-2-3-4 thanked bengz6westmd
BillMN-z-2-3-4
Original Author
last year
Pinus banksiana (Jack pine) is another good example of that beng. And fire or very high outside temperatures are the only thing that will open them.

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