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The three pollen seasons: Trees, grass and weeds A birch tree in the spring forms pollen seen here. Pollen can be broken down in to three categories depending on where it comes from - tree, grass ...
Image of black ash trunk. Tree is located in a seasonally wet, riparian habitat near a small-scale stream. Tree bark is corky and spongy. Black ash is a medium-sized deciduous tree reaching 15–20 metres (49–66 ft) (exceptionally 26 metres (85 ft)) tall with a trunk up to 60 cm (24 inches) diameter, or exceptionally to 160 cm (63 inches).
And blooming trees means pollen. Lots of it. According to pollen.com , the Midlands and Lowcountry have seen medium to medium-high levels of pollen in recent days.
Fraxinus anomala is a deciduous shrub or small tree approaching maximum heights of five to six meters. The leaf may be simple or it may be compound, composed of up to five leaflets which look like individual leaves. Each leaflet is oval-shaped to round and may have teeth along the edges. The nondescript brownish flowers lack petals.
Fraxinus velutina is a small deciduous tree growing to 10 m tall, with a trunk up to 30 cm diameter. The bark is rough gray-brown and fissured, and the shoots are velvety-downy. The leaves are 10–25 cm long, pinnately compound with five or seven (occasionally three) leaflets 4 cm or more long, with an entire or finely serrated margin.
Tree pollen is expected to be the worst in the Pacific Northwest this year. For allergy sufferers living in this region, limiting the amount of time spent outside this spring may be a good idea.
Manchurian ash can be used as a medium height wind break for a farmstead. It is also highly tolerant of urban pollution and will even grow well in inner city environments. The tree also makes an excellent landscape tree in moist areas, especially along roads and ditches where a good amount of water can be available.
In mid to late spring, the tree produces small flowers that are not very noticeable. It is dioecious ; it requires two separate plants (male and female) to successfully pollinate and reproduce. The fruit , produced by female trees, is a cluster of samaras , 3–5 cm ( 1 + 1 ⁄ 8 –2 in) long that includes wings similar to maple trees.
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