Tips for Identifying Juniperus Ashei for the Pollen Trackers Campaign November 2019

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Tips for identifying Juniperus ashei for the Pollen Trackers campaign November 2019 www.usanpn.org Welcome to the Pollen Trackers campaign! We are interested in your observations of pollen cones on Juniperus ashei in Texas from December to February. This guide will help you to identify the correct species of juniper and selecting a male, as opposed to a female, tree. Please refer to the Phenophase Photo Guide for Juniperus ashei, located on the Pollen Trackers landing page (usanpn.org/nn/PollenTrackers), for photos of pollen cones. www.usanpn.org Where can I find Juniperus ashei? This species is primarily found in central Texas www.usanpn.org What does Juniperus ashei look like? • Small coniferous tree that can grow as tall as 30’. • Grows in both open areas and in closed canopy forests. • Scale-like leaves are green year-round and the shoots are rounded but not flattened. • Blue seed cones and pollen cones reach maturity in December to February. • Reaches reproductive maturity at heights as short as 4’. Its bark is reddish-brown and peels into long strips. • Male trees have small green or brown pollen cones. Female trees have blue juniper “berries.” www.usanpn.org What does Juniperus ashei look like? Adult trees: Open-grown Ashe’s Closed canopy juniper trees Ashe’s juniper tree Daniel Katz. CC BY-NC 4.0 Daniel Katz. CC BY-NC 4.0 www.usanpn.org What does Juniperus ashei look like? Adult trees: Daniel Katz. CC BY-NC 4.0 Daniel Katz. CC BY-NC 4.0 www.usanpn.org How do I know if I have a male tree? Male trees have small green or brown pollen cones Note dark orange color of male trees (due to pollen cones) Daniel Katz. CC BY-NC 4.0 Daniel Katz. CC BY-NC 4.0 www.usanpn.org How do I know if I have a male tree? Female trees have blue juniper “berries” Daniel Katz. CC BY-NC 4.0 www.usanpn.org Look-alike species to avoid: Juniperus virginiana (eastern red cedar) • More common to the east of I-35 in TX • Flowers in early spring (March) • More of an upright conical growth form • Seed cones are smaller and rounder www.usanpn.org Look-alike species to avoid: Juniperus pinchotii (redberry juniper) • Has red/brown seed cones instead of blue seed cones • Often has small flecks of a waxy white substance on its leaves • More stems • Produces pollen in the late fall www.usanpn.org.

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