Plants of Southern California: Agoseris retrorsa, A. grandiflora, and their hybrid
Table of Contents
Introduction
Distinguishing Characteristics
Geographic Distribution of These Taxa in the Cuyamaca Mountains
Fig. 1. Young plants of Agoseris retrorsa and A. grandiflora growing together in Cuyamaca Rancho State Park along the Azalea Spring Trail on 28 May 2021. Even these young plants show well the typical difference between these species in their leaf shapes. A. retrorsa has a narrow leaf rachis, with deep lobes that are pointed backward. A. grandiflora has a wider leaf, generally entire or with very shallow lobes, but sometimes with deeper lobes that are not pointed backward; see Fig. 3.
Note that a leaf from an unlabeled A. retrorsa extends through the base of the labeled A. grandiflora.
Click on the picture for a larger version.
Introduction
Distinguishing Characteristics
Geographic Distribution of These Taxa in the Cuyamaca Mountains
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Copyright © 2021 by Tom Chester and Jim Roberts
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Last update: 31 May 2021