1. Annual growth of a pitch pine (Pinus rigida).
Annual growth of a pitch pine (Pinus rigida). (A) Early spring just before year’s growth starts. (B) Spring: “candle” stage. (C) Late spring: “candles” starting to fill out. (D) Summer: new growth has filled out. (E) Fall: oldest needles yellow and fall off. A time-lapse movie of 1 year’s growth is included in the online material. These photos were taken with the aid of “Picture Post” (picturepost.unh.edu).
Susan Wells Rollinson; AM BIOL TEACH 2012;74:
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