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Picea rubens, commonly known as red spruce, is a species of spruce native to eastern North America, ranging from eastern Quebec and Nova Scotia, west to the Adirondack Mountains and south through New England along the Appalachians to western North Carolina and eastern Tennessee.
The peg-like base of the needles, or pulvinus, in Norway spruce (Picea abies) Pulvini remain after the needles fall (white spruce, Picea glauca). Determining that a tree is a spruce is not difficult; evergreen needles that are more or less quadrangled, and especially the pulvinus, give it away.
Peripatric speciation is a mode of speciation in which a new species is formed from an isolated peripheral population. [1]: 105 Since peripatric speciation resembles allopatric speciation, in that populations are isolated and prevented from exchanging genes, it can often be difficult to distinguish between them, [2] and peripatric speciation may be considered one type or model of allopatric ...
WASHINGTON (Reuters) -President-elect Donald Trump has urged the U.S. Supreme Court to pause implementation of a law that would ban popular social media app TikTok or force its sale, arguing he ...
At least 35 children were killed and six others critically injured in a crowd crush at a funfair in the Nigerian city of Ibadan on Wednesday, police said.
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Renée Zellweger took a step back from acting for a six-year stretch in the 2010s, and she's opening up about the reason for her hiatus.. The Oscar-winning "Bridget Jones's Diary" actress, 55 ...
To describe Picea critchfieldii as a new and distinct species, carefully analyzed plant macrofossil specimens of fossilized spruce needles and cones were assessed. [1] After close examination, these specimens could not be assigned to any extant species of Picea given distinctive morphological and anatomical features of their needles and cones. [1]