diff --git a/data/86/BA/6F/86BA6F4B607256539EF2699950854790.xml b/data/86/BA/6F/86BA6F4B607256539EF2699950854790.xml new file mode 100644 index 00000000000..5b85a82101e --- /dev/null +++ b/data/86/BA/6F/86BA6F4B607256539EF2699950854790.xml @@ -0,0 +1,567 @@ + + + +Dryopteris × subdiffracta (Dryopteridaceae), a new natural hybrid fern from Guangxi, China + + + +Author + +Wei, Hong-Jin +0000-0002-3679-6683 +Eastern China Conservation Centre for Wild Endangered Plant Resources, Shanghai Chenshan Botanical Garden, Shanghai, 201602, China + + + +Author + +Zuo, Zheng-Yu +0000-0002-8334-6132 +Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, 650201, China + +text + + +PhytoKeys + + +2024 + +2024-12-18 + + +250 + + +7 +19 + + + +journal article +10.3897/phytokeys.250.119803 + + + + + +Dryopteris +× +subdiffracta +H. J. Wei & Z. Y. Zuo + +nothosp. nov. + + + + +Figs 3 +, +4 +, +5 C, D + + + + +≡ + +D. diffracta +(Baker) C. Chr. + +× + +D. polita +Rosenst. + + + + + +Type. + + + +China +• +Guangxi +: +Jinxiu county +, +Mt. Shengtangshan +, +in broad-leaved forest +, + +23°58'11"N +, +116°6'54"E + +, elev. + +1156 m + +, + +9 May 2018 + +, + +She-Lang Jin +, +Jing Liu +, +Qi-MingTang +& +Xu Yan +JSL 6337 + +( +holotype +: +CSH 0200999 +!; +isotypes +: + +CSH + +!, + +IBK + +!, + +KUN + +!) + +. + + + + +Diagnosis. + + + +Dryopteris +× +subdiffracta + +is similar to + +D. +× +subreflexipinna + +in having slightly flexuous rachis and deflexed pinna stalks, but the former has a tripinnate to tripinnate-pinnatisect frond, narrowly ovate or oblong pinnulets with obtuse apex and nearly symmetric base, while the latter has 4 - pinnate frond, ovate pinnulets with round or obtuse-rounded apex and asymmetric base. + + + + + + + +Dryopteris +× +subdiffracta + +A +habitat showing the plant growing together with parents (arrows inset) +B + +Dryopteris diffracta + +and + +D. polita + +C +adaxial view of lamina +D +habit +E +abaxial view of lamina +F +adaxial view of lower portion of middle pinna with portion of rachis +G +adaxial view of lower portion of middle pinna with portion of rachis +H +ultimate pinnule +I +sori +J +indusium +K +adaxial view of portion of rachis with lower portion of costae +L +rhizome with lower portion of stipes. Photographed by Hong-Jin Wei. + + + + + +Description. + + +Rhizome +erect, densely covered with brown scales at apex. +Frond +(42 –) +50–84 cm +; stipe stramineous, (23 –) +26–56 cm +, (1 –) +1.5–3 mm +in diam. at middle part, sparsely covered with scale at base, upwards glabrous, grooved adaxially; scales lanceolate, ca. 16 × +2.4 mm +, brown, entire; +lamina +3 - pinnate to nearly 4 - pinnate, deltoid to ovate-deltoid, (22 –) 27–43 × (15 –) +25–34 cm +, base round or broadly cuneate, apex acuminate, rachis somewhat flexuous; +pinnae +8–12 pairs, triangular-lanceolate, slightly falcate, alternate, lowest pair sometimes opposite to nearly opposite, stalked, stalks of lower pinnae slightly deflexed, bases forming an angle of ca. 70–85 ° with rachis, upswept distally, +2–6.5 cm +apart from each other, stalks of middle pinnae spreading; +lowest pinna +largest, deltoid, (9 –) 12–21 × (6 –) +7–13 cm +, base broadly cuneate or truncate, apex acuminate, stalk (1.5 –) +2–4 cm +; +pinnules +8–12 pairs, often anadromous, 1 - or 2 - pinnate, alternate, spreading, triangular-lanceolate, apex shortly acuminate, proximal pairs shortly stalked, bases broadly cuneate or shallowly cordate, nearly symmetrical, distal pairs of pinnules nearly sessile, bases asymmetrical, acroscopically broadly cuneate, basiscopically cuneate, basal acroscopic pinnule of pinna as large as or slightly smaller than adjacent ones, basal basiscopic pinnule on lowest pinna largest, (3.6 –) 5.5–7.5 (– 9) × (1.7 –) +2–3.7 cm +, shortly acuminate, stalklet (1.5 –) +2–4 mm +; +pinnulets +6–10 pairs, often anadromous, proximal 2–5 pairs free, alternate, spreading to ascending, ovate to ovate-oblong, basal acroscopic one as large as or slightly larger than basiscopic one, bases of proximal pair rounded-cuneate, nearly symmetrical, bases of others rounded-cuneate to cuneate acroscopically, cuneate to narrowly cuneate basiscopically, apex blunt, acute to subacute, with 1 or 2 short obtuse teeth, larger pinnules (9.5 –) 11–18 × (5.5 –) +6.5–11 mm +, stalklet +0.5–2 mm +, pinnatifid or pinnatisect at base, with 1 or 2 free lobes proximally; +lobes +1–3 pairs, ovate, narrowly ovate or oblong, ascending, margin undulant to entire, base narrowly cuneate, apex obtuse, entire or with 1 or 2 short obtuse teeth, larger lobes 3–6 × +2–3 mm +; upper pinnae gradually reduced, spreading to oblique; +lamina +herbaceous, green on adaxial surface and light green on abaxial surface when dry, both surfaces glabrous, rachis and rachillae of every order stramineous, nearly glabrous expect for several hair-like scales on midribs and rachillae on abaxial surface, grooved adaxially; +veins +indistinct on adaxial surface, visible on abaxial surface, pinnate on pinnulets, veinlets forked or simple on lobes, not reaching margin; +sori +medial or slightly nearer to margin than to costa, terminal on veinlets, 1–3 pairs on each ultimate lobes; +indusium +brown, papery, entire, fugacious. + + + + + + + +Dryopteris +× +subdiffracta + +A +habit +B +portion of costa with pinnule showing veins and sori +C +scale from stipe base. Illustrated by Hong-Jin Wei. + + + + + + + + +Dryopteris diffracta + +(top), + +D. × subdiffracta + +(middle) and + +D. polita + +(bottom) +A +, +C +, +E +habit +B +portion of rachis with portion of upper pinna +D +portion of rachis with portion of middle pinna +F +portion of middle pinna. Photographed by Hong-Jin Wei. + + + + + +Geographical distribution and ecology. + + + +Dryopteris +× +subdiffracta + +was found in Jinxiu, Shangling and Wumin County, +Guangxi Zhuang +Autonomous Region, South +China +(Fig. +6 +), always growing together with + +D. diffracta + +and + +D. polita + +in broad-leaved forests at the elevation of +800–1200 m +. + + + + + + +Geographical distributions of + +Dryopteris +× +subdiffracta + +(centers of rings) in Guangxi Zhuang Autonomous Region, China. + + + +We noticed that +two specimens +of + +D. +× +subreflexipinna + +( +TAI +270081, +TAI +270101) collected from +Taiwan +are consistent with the characteristics of the new hybrid. There is a strong possibility that these +two specimens +were collected in the area where + +D. diffracta + +coexisted with + +D. polita +. + +Dryopteris × +subdiffracta + + +might be distributed to +Taiwan +. + + + + +Etymology. + + +The specific name is derived from the Latin prefix sub- (close to), and + +diffracta + +, epitheton of a species, referring the new species is closely related to + +Dryopteris diffracta + +. + + + + +Chinese name. + +曲轴鳞毛蕨 (qū zhóu lín máo jué). + + + + +Paratypes +. + + + + +China +• +Guangxi +: Same place as the holotype, + +1100–1200 m + +, + +9 May 2018 + +, + +She-Lang Jin +, +Jing Liu +, +Qi-MingTang +& +Xu Yan +JSL 6341 + +( + +CSH + +!), + +Jing Liu +, +She-Lang Jin +, +Qi-MingTang +& +Xu Yan +DYS 426, DYS 427, DYS 428 + +( + +IBK + +!) + +• + +ibid., + +15 Aug. 2023 + +, + +Zheng-Yu Zuo +Zuo 5589 + +( + +KUN + +!) + +• + +ibid., + +2 Mar. 2024 + +, + +Ming-jin Wei +& +Yu-jin Wei +JSL 9482 + +( + +CSH + +!) + +. + + + + +Additional specimens examined. + + + +China +• +Guangxi +: +Wumin County +, +Mt. Damingshan +, +Gannanhe +(Ganlanhe), elev. + +800–1000 m + +, + +14 Sep. 1991 + +, + +Hou-Gao Zhou +& +Hua Li +2769 + +( + +IBK + +!) + +• + +Shangling County +, +Mt. Damingshan +, +Ganlanhe +, elev. + +900 m + +, + +16 Jul. 2011 + +, + +Lei Wu +& +She-Lang Jin D +2760 + +( + +IBK + +!) + +. + + + + \ No newline at end of file