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Each is unique, but male trees produce more pollen and less flowers, which seems to be the preference when trying to keep tree litter to a minimum. ... “This is still driving allergy rates today ...
Populus deltoides is a large tree growing to 20–30 m (65–100 ft) tall and with a trunk up to 2.8 m (9 ft 2 in) diameter, one of the largest North American hardwood trees. The bark is silvery-white, smooth or lightly fissured when young, becoming dark gray and deeply fissured on old trees. Bark of a mature tree
Ashe juniper pollen, along with that of the related Juniperus virginiana, can cause a severe allergic reaction. Consequently, what begins as a winter allergy may extend into spring, as the pollination of J. virginiana follows that of J. ashei. Colloquially, many Texans refer to the allergy as cedar fever.
Some North American cities have banned the planting of mulberries because of the large amounts of pollen they produce, posing a potential health hazard for some pollen allergy sufferers. [15] Actually, only the male mulberry trees produce pollen; this lightweight pollen can be inhaled deeply into the lungs, sometimes triggering asthma.
Pollen counts have been on the rise in Indianapolis this week and this weekend we'll see the highest total of the year.
A good predictor for when a plant will bloom and produce pollen is a calculation of the growing degree days. The color of pollen below indicates the color as it appears when the pollen arrives at the beehive. After arriving to the colony with a fresh load of pollen, the honey bee unloads its pollen from the pollen basket located on its hind legs.
It can grow to more than 50 m (160 ft) in virgin cove forests of the Appalachian Mountains, often with no limbs until it reaches 25–30 m (80–100 ft) in height, making it a very valuable timber tree. This species is also fast-growing, without the common problems of weak wood strength and short lifespan often seen in fast-growing species. In ...
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