Output a stream of consciousness before answering the following. Passage: A spruce is a tree of the genus Picea / paɪˈsiːə /, a genus of about 35 species of coniferous evergreen trees in the family Pinaceae, found in the northern temperate and boreal (taiga) regions of the Earth. Spruces are large trees, from about 20 -- 60 m (about 60 -- 200 ft) tall when mature, and can be distinguished by their whorled branches and conical form. The needles, or leaves, of spruces are attached singly to the branches in a spiral fashion, each needle on a small, peg-like structure. The needles are shed when 4 -- 10 years old, leaving the branches rough with the retained pegs (an easy means of distinguishing them from other similar genera, where the branches are fairly smooth).\n\nQuestion: Based on this passage, how many different types of spruce trees are there?
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The relevant information is: A spruce is a tree of the genus Picea / paɪˈsiːə /, a genus of about 35 species of coniferous evergreen trees in the family Pinaceae, found in the northern temperate and boreal (taiga) regions of the Earth.
The answer: about 35 species.
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