Data on involucre colour and indumentum intensity from Scorzoneroides autumnalis (Asteraceae) ...

• Main Authors: Andersson, Stefan, Ingimundardóttir, Gróa Valgerður, Tyler, Torbjörn, Cronberg, Nils, Hedrén, Mikael
• Format: Dataset
• Language: English
• Published: Dryad 2024
• Subjects: Asteraceae; Scorzoneroides autumnalis; phenotypic plasticity; morphology; inflorescence; Indumentum; FOS Biological sciences; Iceland
• Online Access: https://dx.doi.org/10.5061/dryad.m37pvmd97; https://datadryad.org/stash/dataset/doi:10.5061/dryad.m37pvmd97

Scorzoneroides autumnalis is a highly polymorphic perennial with several described infraspecific taxa, largely differing in involucre colour and indumentum intensity. Here, we examine the role of ecotypic divergence and phenotypic plasticity in shaping large-scale geographical variation in these characters. We collected phenotypic data from herbarium specimens and garden-grown plants of S. autumnalis, representing several habitats throughout Scandinavia and Iceland, and subjected progenies from controlled crosses within a subset of the common garden material to different temperature regimes to assess patterns of phenotypic plasticity. Our results strongly suggest that colour and indumentum of involucral bracts, as well as the size of capitula (measured by ligule length), are environmentally plastic and much affected by temperature. Reduced temperature resulted in significantly larger capitula, with both thicker and darker involucre indumentum. Since dark colouration, dense indumentum and large floral ... : The data represents unprocessed raw data, collected by scoring dried capitula (flower heads) on specimens from 13 Nordic herbaria, plants grown in a common garden at Lund University (2019) and plants grown in climate chamber at Lund University (2021) for involucre colour and indumentum intensity, based on predetermined grading categories 1-5 for colour and 1-4 for indumentum). ...