A new combination in Pseudolappula (Boraginaceae, Rochelieae) based on morphological, molecular and palynological evidence

By

Liu, Danhui
Xu, Xue-Min
He, Yi
Liu, Quan-Ru

Type

Article

Date of Publication

2021

Original Publication

PhytoKeys

Volume

187

Pages

77--92

Subjects

Boraginaceae , Lappula occultata , new combination , Pseudolappula

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.187.75346

 

Abstract

Lappula sinaicawas recently transferred to the monotypic genusPseudolappulabased on phylogenetic studies, while the related species,L. occultata, has remained in the genusLappula. In this study, morphological, molecular, and palynological evidence supports thatL. occultatashould be transferred to the genusPseudolappula. BothL. occultataandP. sinaicashare a combination of nutlets features that distinguish them fromLappula: a longer adaxial keel and a linear attachment scar. Phylogenetic analysis based on ITS andtrnL-Fstrongly supportsL. occultataas the sister taxon ofP. sinaica. In addition, pollen grains of these two species are 3-syncolporate with 3 alternating pseudocolpi, which is significantly different from the grains ofLappulataxa. Based on the above evidence, the new combinationPseudolappula occultatais proposed.