Nature’s Notebook Phenophase Photo Guide

Viburnum prunifolium blackhaw

Why Observe? Your observations will help us quantify the extent to which invasive exhibit extended phenology (having for a longer period of time than natives in the same location). The Shady Invaders campaign compares the leaf phenology of native (blackhaw) and invasive shrubs across the eastern U.S. in order to improve the timing/planning of land management activities, to predict how research on the impacts of extended leaf phenology (ELP) at one location applies across the range, and to examine how climate change may influence ELP.

Tips for Identification A reaching 12’-15’. Commonly single and multi-stemmed. The branches leave the stem at nearly 90 degree angles in a “fishbone” pattern. The leaf margin (edge) is finely serrate. The is smooth in youth, but ages with much more texture. Spring are white in flat- topped clusters with a diameter up to 4.5 inches. Eric Burkhart A mix of green/yellow, and red/pink transition to black when ripe.

Be aware there is variation from individual to individual within a species, so your may not look exactly like the one pictured. If you are uncertain whether or not a phenophase is occurring, report a “?” for its status until it becomes clear what you are observing after subsequent visits. Eric Burkhart Erynn Maynard

This Phenophase Photo Guide has been vetted by the USA-NPN NCO. It is appropriate for use as Last updated: August 2018 a supplement to the Nature's Notebook phenophase definition sheet for this species. Nature’s Notebook Phenophase Photo Guide prunifolium blackhaw

Breaking leaf Leaves One or more breaking leaf buds One or more live, unfolded leaves are visible on the plant. A leaf are visible on the plant. A leaf is No Yes is considered "breaking" considered "unfolded" once its once a green leaf tip is visible at entire length has emerged from a the end of the bud, but before breaking bud, stem node or the first leaf from the bud has growing stem tip, so that the leaf Yes Erynn Maynard unfolded to expose the leaf stalk stalk (petiole) or leaf base is Erynn Maynard (petiole) or leaf base. Erynn Maynard visible at its point of attachment to the stem. Do not include fully dried or dead leaves.

Increasing leaf size Colored leaves A majority of leaves on the plant One or more leaves show some have not yet reached their full of their typical late-season color, size and are still growing larger. or yellow or brown due to Do not include new leaves that drought or other stresses. Do not continue to emerge at the ends include small spots of color due of elongating stems throughout to minor leaf damage, or dieback the growing season. on branches that have broken. Erynn Maynard Do not include fully dried or dead leaves that remain on the plant.

Flowers or buds Open flowers One or more fresh open or One or more open, fresh flowers unopened flowers or flower buds are visible on the plant. Flowers are visible on the plant. Include are considered "open" when the flower buds or inflorescences reproductive parts (male stamens that are swelling or expanding, or female pistils) are visible but do not include those that are between or within unfolded or Ryan Hagerty, via tightly closed and not actively open flower parts (, floral Wikimedia Commons growing (dormant). Also do not Eric Burkhart tubes or sepals). Do not include include wilted or dried flowers. wilted or dried flowers.

Fruits Ripe fruits One or more fruits are visible on One or more ripe fruits are visible the plant. For Viburnum on the plant. For Viburnum prunifolium, the is berry-like prunifolium, a fruit is considered and changes from green to ripe when it has turned blue-pink yellow to red to blue-pink or or blue-black. blue-black.

Eric Burkhart

Phenophases not pictured: Falling leaves, Recent fruit or seed drop

This Phenophase Photo Guide has been vetted by the USA-NPN NCO. It is appropriate for use as Last updated: August 2018 a supplement to the Nature's Notebook phenophase definition sheet for this species.