Tirpitzia meiguensis D.J.Xie & R.B.Zhang, 2023

Xie, Da-Jun, Li, Jin-Xiao, Peng, Shu-Ming, Deng, Tan, Wei, Ruo-Xun, Dou, Quan-Li & Zhang, Renbo, 2023, Tirpitzia meiguensis (Linaceae), a new species from southwest Sichuan (China), Phytotaxa 626 (1), pp. 51-59 : 54

Tirpitzia meiguensis D.J.Xie & R.B.Zhang sp. nov. NJÊȒDZ¨ [měi gū qīng lí chái] Figs. 2–3

TYPE: — CHINA. Sichuan Province, Meigu County, Lama Town, Mountain Huangmaogeng of Daliangshan , 103°6′51.7″E, 28°8′11.2″, 1480 m a.s.l, 23 Jul 2022, Da-Jun Xie SCMG01 (fl.) (holotype SCFI!, isotypes ZY!) and 9 Sep 2023, Da-Jun Xie SCMG02 (fr.) (paratype SCFI!, ZY!)

Diagnosis: Similar to T. sinensis in having white flowers, terminal or axillary cymes, a four-loculed ovary with two ovules per locule, and a four-valvate capsule; differs from the latter by many traits and the key differences are the herb-like habit, toothed leaf margin, subulate stipules with decurrent appendages, and seeds without a membranous wing. These characteristics have not been seen in the three previously-reported Tirpitzia species .

Figures

FIGURE 2. Line drawing of Tirpitzia meiguensis D.J.Xie & R.B.Zhang, sp. nov. A. Habit; B. Leaf; C. Bract; D. Flower; E. Pistil; F. Stamens; G. Opened stamens; H. Sepals; I. Stipule; J. Ovary cross section; K. Seed. Drawn by Tan Deng.

FIGURE 3. Photographs of living or re-watered Tirpitzia meiguensis D.J.Xie & R.B.Zhang, sp. nov. A. Habitat; B. Plant; C. Root; D. Flower; E. Fruit; F. Leaf margin; G. Bract; H. Bracteoles; I. Stipule; J. Floral segregation; K. Opened corolla; L. Filament tube and staminodes; M. Capsule; N. Seeds. Photographed by Da-Jun Xie, Shu-Ming Peng & Ren-Bo Zhang.