pubmed.ncbi.nlm.nih.gov

Phylogeny and taxonomy of Cinnamomum (Lauraceae) - PubMed

  • ️Sat Jan 01 2022

. 2022 Oct 1;12(10):e9378.

doi: 10.1002/ece3.9378. eCollection 2022 Oct.

Affiliations

Phylogeny and taxonomy of Cinnamomum (Lauraceae)

Zhi Yang et al. Ecol Evol. 2022.

Abstract

Taxonomy of Cinnamomum Schaeff. of Lauraceae remains problematic because recent phylogenetic studies have suggested that this genus is not monophyletic. In this study, we assembled three sequence matrices including plastomes (datamatrix I), nrITS sequences alone (datamatrix II), and nrITS plus plastid psbA-trnH sequences (datamatrix III) of the Cinnamomum-Ocotea complex of Lauraceae and conducted a new phylogenetic study with thusfar the most extensive species sampling of the Cinnamomum-Ocotea group. We determined that the Old World Cinnamomum is diphyletic: sect. Camphora Meisn. is sister to Sassafras J.Presl and sect. Cinnamomum is sister to the African Kuloa Trofimov & Rohwer. A recent study indicated that characters of leaf micromorphological anatomy can define the two clades: one possessing reticulate periclinal and the other having non-reticulate periclinal walls. As result, we divided the genus Cinnamomum of Lauraceae into two genera, i.e., Cinnamomum and Camphora Fabr. The generic name Cinnamomum is retained for those species mainly having reticulate periclinal epidermal cell walls, inconspicuous non-perulate terminal buds and usually tripliveined leaves; the oldest generic name, Camphora, is applied to the second group which contains those species mainly possessing non-reticulate periclinal epidermal cell walls, prominent perulate terminal buds and pinnately-veined leaves. A census of the species and their type specimens listed under Cinnamomum in Asia resulted in the transfer of 18 species to Camphora, including 15 new combinations.

Keywords: Camphora; Cinnamomum; Lauraceae; new combinations; phylogeny; taxonomy.

© 2022 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.

PubMed Disclaimer

Conflict of interest statement

The authors declare that there is no conflict of interest.

Figures

FIGURE 1
FIGURE 1

Morphology of Cinnamomum Schaeff. (a–d) Cinnamomum camphora (L.) J. Presl (= Camphora officinarum Nees); (e–h) Cinnamomum glanduliferum (Wall.) Meisn. (≡ Camphora glandulifera (Wall.) Nees).

FIGURE 2
FIGURE 2

Morphology of Cinnamomum Schaeff. (a–d), Cinnamomum japonicum Sieb.; (e–h) Cinnamomum bejolghota (Buch.‐Ham.) Sweet.

FIGURE 3
FIGURE 3

Phylogenetic trees of the Cinnamomum‐Ocotea complex based on three sequence datamatrices using maximum likelihood (ML) and Bayesian inference (BI). The support values of ultrafast bootstrap (UFBS ≥ 70%; on the left) and posterior probability (PP ≥ 70%; on the right) are shown below branches.

FIGURE 4
FIGURE 4

Maximum likelihood (ML) tree of the Cinnamomum‐Ocotea group using nrITS and psbA‐trnH data. Ultrafast bootstrap values of the outgroup and the five ingroup clades are shown on the tree. Illustrations display macro‐ and micromorphological characters of sect. Camphora s.s. (a–c) and Cinnamomum s.l. (d–h). (a) Alternate and pinnately veined leaves; (b) prominent perulate terminal buds; (c) non‐reticulate periclinal wall of the upper leaf epidermis; (d) opposite/subopposite and tripliveined leaves; (e) non‐perulate terminal bud; (f,g) reticulate periclinal wall of the upper leaf epidermis. The illustrations c, f, and g were published by Gang et al. (2021).

FIGURE 5
FIGURE 5

Morphology of Cinnamomum saxatile H.W. Li, an unusual species of Cinnamomum Schaeff. With pinnately veined leaves. (a) Inflorescence branch; (b), inflorescence; (c), infructescence branch; (d), fruit.

Similar articles

Cited by

References

    1. Bentham, G. , & Hooker, J. D. (1880). Laurineae. In Bentham G. & Hooker J. D. (Eds.), Genera Plantarum (Vol. 3, pp. 146–168). L. Reeve.
    1. Blume, C. L. (1849. –1851). Museum botanicum Lugduno‐Batavum, sive, Stirpium exoticarum novarum vel minus cognitarum ex vivis aut siccis brevis expositio et descriptio. Tom. I. E.J. Brill.
    1. Capella, G. S. , Silla, M. J. M. , & Gabaldón, T. (2009). trimAl: A tool for automated alignment trimming in large‐scale phylogenetic analyses. Bioinformatics, 25, 1972–1973. - PMC - PubMed
    1. Chanderbali, A. S. , van der Werff, H. , & Renner, S. S. (2001). Phylogeny and historical biogeography of Lauraceae: Evidence from the chloroplast and nuclear genomes. Annals of the Missouri Botanical Garden, 88, 104–134.
    1. De Kok, R. P. J. (2019). A revision of Cinnamomum Schaeff. (Lauraceae) for peninsular Malaysia and Singapore. Gardens' Bulletin Singapore, 71, 89–139.