Forest Service lichenologist Sarah Jovan hardly has to walk half a block from her office in downtown Portland to find the type of shaggy, green moss she used to discover the city's hidden hot spots of ...
DEAR JESSICA: I have a pear tree that's about 55 years old and have noticed what looks like grass or moss on its limbs. Due to a neighbor's very tall house, this tree does not get much sun, especially ...
A forest is really a community of plants and animals. Within this large community are smaller groups of living things that grow together. Even an individual tree often has an association of plants ...
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