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Issue: Vol. 672 No. 1: 19 Nov. 2024
Type: Article
Published: 2024-11-19
DOI: 10.11646/phytotaxa.672.1.1
Page range: 1-29
Abstract views: 104
PDF downloaded: 11

A taxonomic monograph of the Eurasian holoparasitic plant genus Lathraea L. (Orobanchaceae)

Royal Botanic Gardens, Kew, London, TW9 3AE, UK. Earth and Environmental Sciences, University of Manchester, Manchester, M13 9PY, UK.
Department of Forest and Natural Environment Sciences, Democritus University of Thrace, Drama, 66132, Greece.
Department of Biology, University of Oxford, Oxford, OX1 3RB, UK. University of Oxford Botanic Garden and Arboretum, Oxford, OX1 4AZ, UK.
Lamiales Lathraea Orobanchaceae Lathraea squamaria Lathraea clandestina parasitic plants holoparasite Lathraea japonica Lathraea rhodopea Lathraea purpurea Eudicots

Abstract

A taxonomic monograph is presented for Lathraea L. (Orobanchaceae), a genus of holoparasitic plants distributed across Europe and Asia. Plants in this genus are characterised by their underground stems, achlorophyllous scales with internal gland-lined cavities, and, in some species, explosive seed dehiscence. Despite their conspicuousness, no taxonomic treatment of the genus has been written since 1930. Our work draws upon extensive international field data and a comprehensive survey of herbarium specimens. Detailed descriptions are provided for each species, along with full synonymy, distribution maps, and notes on habitat, host specificity, phenology, ecology, ethnobotany and threat risk. We present evidence to consolidate Lathraea into five species, resolving taxonomic confusion. The infrageneric classification is reviewed and a key to species is provided. Species are illustrated with photographs of living and dried material.

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