A new species of Croton (Euphorbiaceae) endemic to the Brazilian Pampa and its phylogenetic affinities

Croton guaritensis , sp. nov. is here described, illustrated, and classified based on morphological and molecular data. The new species is restricted to the Pampa biome where it grows around rocky outcrops. Examination of the morphology from herbarium collections and field observations, as well as e...

Full description

Saved in:
Bibliographic Details
Published in:Plant systematics and evolution 2022-04, Vol.308 (2), Article 14
Main Authors: Pereira, Amanda da Paixão Noronha, Riina, Ricarda, Valduga, Eduardo, Caruzo, Maria Beatriz Rossi
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Conservation status
Ecosystems
Endemic species
Flowers
Identification keys
Life Sciences
Morphology
New species
Original Article
Outcrops
Phylogenetics
Phylogeny
Plant Anatomy/Development
Plant Ecology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Rare species
Sepals
Taxonomy
Trichomes
Vegetation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Croton guaritensis , sp. nov. is here described, illustrated, and classified based on morphological and molecular data. The new species is restricted to the Pampa biome where it grows around rocky outcrops. Examination of the morphology from herbarium collections and field observations, as well as evidence from molecular analysis, indicate that Croton guaritensis belongs to Croton section Barhamia subsection Medea . Croton subsection Medea is represented by several rare and endemic species and stands out by its glandular structures in stipules, bracts, and sepals. The new species differs from other species of this subsection in the indumentum on branches and leaves, which consists of subentire lepidote trichomes, and in the sepals of staminate and pistillate flowers that have stipitate glands. An identification key to the new species and closely related taxa in southern Brazil is provided, as well as a preliminary conservation status.
ISSN:0378-2697
1615-6110
2199-6881
DOI:10.1007/s00606-021-01803-x