102 urn:lsid:arphahub.com:pub:73abe0ce-d97c-5d7c-bee5-b8e6e6fe6a17 ARPHA Preprints preprints Pensoft Publishers 10.3897/arphapreprints.e58764 58764 Single Taxon Treatment Liliaceae Biodiversity & Conservation Systematics Taiwan Lilium longiflorum var. longiflorum (Liliaceae), a neglected lily of Taiwan Chao Chien-Ti ff8bahamut@gmail.com https://orcid.org/0000-0001-6778-4629 1 National Taiwan Normal University, , Taiwan National Taiwan Normal University Taiwan

Corresponding author: Chien-Ti Chao (ff8bahamut@gmail.com).

Academic editor:

2020 17 09 2020 1 5B7E97EE-55BE-5D24-BE0E-6055BE7CE2D1 17 09 2020 17 09 2020 Chien-Ti Chao This is an open access preprint distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Background

The genus Lilium comprises ca. 100 species and famous byb its showy flowers. In Taiwan, four taxa were recorded in Flora of Taiwan, namely L. callosum, L. formosanum, L. speciosum var. gloriosoides, and L. longiflorum var. scabrum. 

New information

In this article, the author reported a newly recorded lily taxon, Lilium longiflorum Thunb. var. longiflorum. This variety is morphologically similar to the other two endemic taxa, L. longiflorum Thunb. var. scabrum Masam. and L. formosanum Wallace of Taiwan, and is often misidentified as such. However, L. longiflorum var. longiflorum is distinguished from them by having subglabrous stems, and tepals without purplish stripes. Lilium longiflorum var. longiflorum has only been found in the remote islands of Taiwan, such as Lanyu, Lutao, and Pengchia Islet. The conservation status of the two varieties of L. longiflorum of Taiwan was re-evaluated and assigned as near threatened (NT).