Tuesday, September 20, 2022

[Botany • 2022] Lycoris insularis (Amaryllidaceae) • A New Species from eastern China revealed by Morphological and Molecular Evidence

  Lycoris insularis S.Y. Zhang & J.W.Shao, 

in Zhang, Wang, Hu, ... et Shao, 2022. 

Lycoris insularis S.Y.Zhang & J.W.Shao, a new fertile diploid species from coastal provinces in eastern China is described. This new species is most similar to L. sprengeri in morphology and has been misidentified as the latter for a long time. However, it can be distinguished from the latter by the relatively longer perianth tube (1.5‒2.5 cm vs. less than 1.3 cm), a characteristic that was overlooked before. Phylogenetic analysis, based on complete plastid genome, showed that L. insularis is not genetically related to L. sprengeri in the genus. The former was a sister group of L. sanguinea, while the latter was closely related to L. longituba and L. chinensis and they were respectively located on different clades that were separated at the base of the phylogenetic tree. The chromosome number of L. insularis is 2n = 22. At present, as the new species is relatively widely distributed and the wild population can normally reproduce by seeds, we evaluate it as LC (Least Concern) according to criteria of the IUCN Red List.

Keywords: Lycoris sprengeri, taxonomy, chloroplast genome, cryptic species

  Lycoris insularis S.Y. Zhang & J.W.Shao, sp. nov. 
A inflorescence B habitat C plants in leaf stage D, E, F different individuals G anatomy of the flower H fruit I bulbs G 
photographed by Cheng-sheng Li.


Lycoris insularis S.Y.Zhang & J.W.Shao, sp. nov.
Diagnosis: The new species resembles Lycoris sprengeri by young leaves swirling and rising, tepals usually pink with blue apex and tepals length substantially similar, but differs in significantly longer perianth tube (1.5‒2.5 cm vs. 0.5‒1.3 cm).

Distribution and habitat: Most of the populations grow on the hillsides or island slopes near the sea (the coastal areas of Shanghai City, Zhejiang Province and Fujian Province) and sporadic populations grow around the inland hills and valleys (Fig. 7).
Chinese Name: Hăi bīn shí suàn (海滨石蒜).

Etymology: Latin insulaisland, and -arisbelonging to; the specific epithet alludes to occurrence of the new species in Damao Island.

Si-Yu Zhang, Hao-Tian Wang, Ying-Feng Hu, Wei Zhang, Song Hu and Jian-Wen Shao. 2022. Lycoris insularis (Amaryllidaceae), A New Species from eastern China revealed by Morphological and Molecular Evidence.  PhytoKeys. 206: 153-165. DOI: 10.3897/phytokeys.206.90720