Angiopteris involuta (Marattiaceae), a new endangered fern species from southern Yunnan, China, based on morphology and molecular evidence Author Jiang, Li-Ju 0009-0006-2145-3836 Centre for Gardening and Horticulture, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla 666303, Yunnan, China jiangliju@xtbg.ac.cn Author Zhao, Jing 0000-0001-7871-2209 School of Ecology and Environmental Science, Yunnan University, Kunming 650504, Yunnan, China zhaojing@mail.ynu.edu.cn Author Niu, Hong-Bin 0009-0004-1580-2935 Centre for Gardening and Horticulture, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla 666303, Yunnan, China niuhongbin@xtbg.ac.cn Author Zhou, Xin-Mao 0000-0003-3555-7784 School of Ecology and Environmental Science, Yunnan University, Kunming 650504, Yunnan, China xinmao.zhou@ynu.edu.cn Author Wang, Jia-Guan 0000-0003-0264-9180 School of Life Sciences, Yunnan University, East Outer Ring Road, Chenggong District, Kunming 650500, Yunnan, China wangjiaguan@ynu.edu.cn Author He, Zhao- Rong 0000-0001-6492-3689 School of Life Sciences, Yunnan University, East Outer Ring Road, Chenggong District, Kunming 650500, Yunnan, China zhrhe@ynu.edu.cn text Phytotaxa 2025 2025-12-03 732 1 35 45 https://doi.org/10.11646/phytotaxa.732.1.3 journal article 314429 10.11646/phytotaxa.732.1.3 9bf04ce2-c1fb-4ad6-b3e8-33a4594ca916 1179-3163 18422965
TABLE 4. Morphological comparison of Angiopteris involuta, A. itoi, A. bipinnata, A. sparsisora, and A. sugongii.
CharactersAngiopteris involutaA. bipinnataA. itoiA. sparsisoraA. sugongii
Frond60–120 cm50–80 cm150 cm100–120 cm70–160 cm
Stipe35–70 cm, sparsely tuberculate60–70 cm, smooth100–120 cm, smooth35–70 cm, smooth50–120 cm, smooth
Rhizomeascendingascendingerectlong-creepingascending
Laminaepinnae 5–7 pairs, 5–14 × 1.5–3 cm, bases cuneate, margin serrate to crenulate, fertile pinnules with revolute margins (boat-shaped)pinnae 10–12 pairs, 12–17 × 2–2.8 cm, bases cuneate, margin subentire, undulate, fertile pinnules flatpinnae 7–8 pairs, 26–34 × 3–5 cm, bases cuneate, margin undulate, fertile pinnules flatpinnae 7–15 pairs, 7–16 × 1.5–2.5 cm, bases cuneate, margin serrate to crenulatepinnae 5–12 pairs, 25–35 × 3–5.5 cm, bases cuneate, fertile coarsely dentate, fertile pinnules flat
False veinsabsent (or obscure)absentpresentabsent (or obscure)absent (or obscure)
Sorica. 1–2 mm from margin, ca. 0.2–0.8 cm, with 14–60 sporangiamedial, ca. 4 mm from margin, 1–2 cm, with 20–40 sporangiamedial, 1–1.2 cm, with 40–90 sporangia2–3 mm from margin, 2–4 mm, with 5–16 sporangiaca. 1–2 mm from margin, ca. 0.2–1.2 cm, with 20–80 sporangia
Exosporestuberculate-spinoseforkedverrucoseverrucosespiculose
DistributionJiangcheng, Yunnan, ChinaMalipo, Yunnan, ChinaLianhuachi, Taiwan, ChinaXichou, Yunnan, ChinaHekou, Yunnan, China
Referencethis studyHe & Christenhusz 2013Shieh 1970, Hsieh 2008Ching & Wang 1982Wang et al. 2021