An observable stage or phase in the annual life cycle of a plant or animal that can be defined by a start and end point. Phenophases generally have a duration of a few days or weeks. Examples include the period over which newly emerging leaves are visible, or the period over which open flowers are present on a plant.

Plant “functional groups” were defined by the USA-NPN to organize species by phenological similarities. The major functional groups include Cactus, Conifer, Forb, Grass/Sedge/Rush, Tree/Shrub and are further divided according to leaf retention characteristics (e.g. deciduous, evergreen). Descriptions of each functional group can be found at.

2025年2月3日 · The Phenophase Primer for Flowering Plants: Understanding Plant Phenophases for Nature's Notebook, is finally here! View the Phenophase Primer. This extraordinary 240-page resource will address all of your questions regarding the nuance of phenophase status in plants.

life cycle events, or phenophases, include leaf budburst, first flower, last flower, first ripe fruit, and leaf shedding, among others. Phenophases commonly observed in animals include molting, mating, egg-laying or birthing, fledging, emergence from hibernation, and migration. Thus,

2023年6月16日 · Plant phenophases involve leaf budding, first flower, first ripe fruit, and leaf shedding. The finer detailed information from the iNaturalist community is beneficial in tracking biological events on a daily or weekly basis to help us see emerging patterns in life cycles.

Red maple leaves in the fall. USA NPN. Directions: As you report on phenophase status (Y, N or ?) on the datasheets, refer to the definitions on this sheet to find out what you should look for, for each phenophase in each species.

2023年4月28日 · For plants, phenophases identify the presence or absence of structures (e.g., leaves, flowers, fruits) on an individual plant that is observed repeatedly over the course of one or more growing seasons. For animals, phenophases identify the presence or absence of behaviors such as breeding, migration, and use of food resources.

2022年7月7日 · Known as phenophases, they are a visible stage in a plant’s or animal’s life cycle. If you’ve ever gardened according to adages such as “plant corn when oak leaves are as big as squirrels’ ears,” you’ve been practicing phenology.

2024年12月9日 · Specifically, we classified the phenological events into seven phenophases (dormancy, budburst, leafing, flowering, fruiting, fruit ripening and foliar senescence) for plants (Fig. 1c,d and ...

Phenophase Photo Guides are species-specific guides that provide a photo reference for each of the life cycle stages on the Nature's Notebook protocols. The USA-NPN is working on creating useable guides that will eventually appear on our species profile pages.