A new species and putative hybrids of Manihot (Euphorbiaceae) from Brazil

A new species and putative hybrids of Manihot (Euphorbiaceae) from Brazil

This work describes and illustrates the new species Manihot reflexifolia, sp. nov. and compares its leaf anatomy to Manihot reniformis and probable hybrids between the two species. Manihot reflexifolia is also compared to Manihot jacobinensis from which it can be distinguished by its cylindrical pet...

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Bibliographic Details
Published in:Plant systematics and evolution Vol. 305; no. 8; pp. 663 - 674
Main Authors: Santos, Ariana S., Martins, Márcio L. Lopes, Martins, Fabiano M., de Carvalho, Paulo C. L., da Silva Ledo, Carlos A., Amorim, André M.
Format: Journal Article
Language:English
Published: Vienna Springer Science + Business Media 01-10-2019
Springer Vienna
Springer Nature B.V
Subjects:
Anatomy
Animal behavior
Biomedical and Life Sciences
Flowers
Hybrids
Identification keys
Leaves
Life Sciences
Lobes
Manihot
Mesophyll
Morphology
New species
ORIGINAL ARTICLE
Outcrops
Papillae
Physical characteristics
Plant Anatomy/Development
Plant Ecology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Scanning electron microscopy
Sheaths
Brazil
Leaf morphology
Wild cassava
Endemic species
Taxonomy
Bahia
Conservation
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Summary:This work describes and illustrates the new species Manihot reflexifolia, sp. nov. and compares its leaf anatomy to Manihot reniformis and probable hybrids between the two species. Manihot reflexifolia is also compared to Manihot jacobinensis from which it can be distinguished by its cylindrical petioles, elliptical to short lanceolate, reflexed leaf lobes and staminate flowers restricted to the terminal portion of the inflorescence (upper half), while M. jacobinensis has dorsiventrally flattened petioles, suborbicular to obovate leaf lobes, and staminate flowers along the entire inflorescence axis. The new species is restricted to rocky outcrops of the Chapada Diamantina in central Bahia State, Brazil. An identification key to Manihot species from rocky outcrops of Chapada Diamantina is provided. The leaf anatomy of M. reflexifolia, M. reniformis and the putative hybrids was analyzed using optical and scanning electron microscopy. Leaf anatomy was sufficient to characterize M. reflexifolia, M. reniformis and the putative hybrids, as well as to identify the first two wild taxa as potential progenitors of the hybrids (M. reflexifolia × M. reniformis). The most useful anatomical characteristics were the morphology of the petiole and midrib, bundle sheath extension, organization and quantity of vascular bundles, organization and composition of the mesophyll, and the presence of epidermal papillae.
ISSN:0378-2697
1615-6110
2199-6881
DOI:10.1007/s00606-019-01597-z