identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
F11787D0FFBE0C1DFF57FCF6FD73185C.text	F11787D0FFBE0C1DFF57FCF6FD73185C.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Polystichum cretaceum Xiaohua Chen & Y. F. Gu 2025	<div><p>Polystichum cretaceum Xiaohua Chen &amp; Y.F.Gu sp. nov. (Fig. 2).</p><p>Type:— CHINA. Guangxi: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.856155&amp;materialsCitation.latitude=22.958382" title="Search Plazi for locations around (long 105.856155/lat 22.958382)">Baise City</a>, Napo County, 105°51′22.174″E, 22°57′30.171″N, elev. ca. 1032 m, 20 May 2023, Chen Xiao-hua &amp; Li Min-yu YYH19982 (Holotype PE!; isotype NOCC!) .</p><p>Diagnosis:—It is characterized with a simple lamina, or occasionally pinnatilobate at the base, whereas other species consistently exhibit 1-pinnate laminae. It resembles P. fraxinellum but differs in having oblong-rectangular, entire, and obtuse-apex lateral pinnae, in contrast to the ovate-lanceolate lateral pinnae of P. fraxinellum, which feature slightly curved, distally basiscopic margins that are regularly shallowly incised-toothed with acuminate apices. Additionally, the venation in P. cretaceum is free, whereas it is reticulate in P. fraxinellum (Table 1).</p><p>Evergreen plants, 4.3–8 cm tall. Rhizome erect or ascending, short, 0.5–0.8 cm in diam, densely covered with lanceolate brown scales. Fronds clustered; petiole straw-colored, groove, 2–3 cm long, 0.1–0.2 cm in diameter; basal portion densely covered with scales; basal scales ovate-lanceolate, caudate, brown, edges with lighter color, apex with caudal tip and margins with sparse ciliated; distal stipe scales similar but narrower. Lamina triangular to broadly lanceolate, simple or one lateral pinnules at base or 1-pinnate; simple lamina entire or undulate or slightly repand, coriaceous, elliptic, apex of lamina rounded, base of lamina cordate; 1-pinnate lamina 2.5–3.5 cm long, ca. 1–1.5 cm wide, apex obtuse, pinnae 2–4 pairs, oblong-rectangular, entire, shortly stalked, base asymmetric and cuneate, auricles indistinct; adaxially pilose or glabrous, abaxially sparsely lanceolate scaly. Sori terminal on lateral veins, rounded. Indusium indusiate, orbiculate, peltate. Spores 40–50 μm in diam., the polar view is nearly round, the equatorial view is oval, the outer perispore surface ornamentation is fenestrate, and the spore is smooth after removing the outer perispore (Fig. 3).</p><p>Distribution: —Napo County, Baise City, Guangxi Zhuang Autonomous Region, China.</p><p>Ecology and conservation: — Polystichum cretaceum is currently known only from its type locality in Napo County, Baise City, Guangxi Zhuang Autonomous Region, China, where approximately 50 individuals have been documented. It grows on damp, shaded limestone walls along winding mountain roads. The region’s high rainfall and frequent landslides pose significant threats to the survival of the species.</p><p>Etymology: —The specific epithet “cretaceum ” is derived from the habitat of this newly identified species, which thrives on moist, chalky soil slopes.</p><p>Vernacular name: —H垩※叶ffẍ (bai e liu ye er jue)</p><p>Additional specimens checked:— Polystichum cretaceum (paratype): CHINA. Guangxi: Baise City, Napo County, 105°51′22.174″E, 22°57′30.171″N, elev. ca. 1032m, 15 May 2023, Xu Yi-Da 22251 (NOCC).</p><p>Polystichum fraxinellum: CHINA. Guizhou: 24 Oct 1898, Bodinier, E. M. &amp; Laborde, J. 2527 (E) E00429039; Luodian, elev. 937.3 m, 106°45′44.74″E, 25°33′0.14″N, 14 Oct 2015, Wang M. C. LDX098 (GZTM) GYBG0005447; Zheng'an, Hexi, Shuanglong, 107°22′04″E, 2°26′30″N, elev. 1002.9 m, 25 March2016, Zheng J. H.520324160325014 LY (GZTM) GZTM0043075. Sichuan: Leshan, Mt. Emei, elev. 1400 m, 1 Nov 1964, Guan K. J., Wang J. W. &amp; Li C. L., 2422 (PE) 00984615. Chongqing: Nanchuan, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=107.36778&amp;materialsCitation.latitude=2.4416668" title="Search Plazi for locations around (long 107.36778/lat 2.4416668)">Mt. Jinfoshan</a>, elev. 1100 m, 17 Oct 2002, Zhang X. C., Liu Z. Y. 2596 (PE) 01450701 .</p><p>Polystichum minimum: CHINA. Guizhou: Ninggu, in fissuris rupium, 29 Aug 1965, P. S. Wang 1155 (PE) 00984641 ; Huaxi Park, elev. 1300 m, Cao Z. Y. 0280 (PE) 09984639. Chongqing: Wulong, Changba, elev. 540 m, 21 Sept 2007, Liu Z. Y. 180174 (PE) 01818962 ; Nanchuan, Mt. Jinfoshan, 1 Nov 2002, Lu J. M, Chen Y. &amp; Li H. Z. 047 (KUN) 1225643 ; 29 Sept 2007, Liu Z. Y. 071510 (IMC) IMC0006088. Guangxi: longlin, elev. 1550 m, 105°14′03.72″E, 24°38′37.44″N, 28 Oct 2014, Lv H. Z., Nong D.X. &amp; Cen H. F. 451031141028033 LY (GZTM) GXMG0188418 .</p><p>Polystichum tenuius: CHINA. Guangxi: elev. 1133 m, 2 Aug 1928, Ching R. C. 6649 (PE) 00984597; Nandan, elev. 616 m, 107°36′03.01″E, 25°04′33.28″N, 1 July 2019, Nandan Census Team 451221190701001 LY (GZTM) GXMG0198694. Guizhou: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=110.69278&amp;materialsCitation.latitude=25.075912" title="Search Plazi for locations around (long 110.69278/lat 25.075912)">Maolan National Nature Reserve</a>, elev. ca. 800 m, 20 Aug 2015, Li Z. Y., Wei R. &amp; Zhang H. R. 7326 (PE) 02056173. Hunan: Changde, Shimen, Anxi, 110°41′34″E, 29°50′'30″ N, 31 Oct 2013, Jin S. L. &amp; Zhang J. B. ISL-WLSQ202 (CSH) CSH0141140 ; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=110.081665&amp;materialsCitation.latitude=29.709723" title="Search Plazi for locations around (long 110.081665/lat 29.709723)">Sangzhi</a>, elev. 420, 110°04′54″E, 29°42′35″N, 21 Oct 2014, Zhou X. L., Yan Y. H. &amp; Jin D. M. ZXL9690 (CSH) CSH0045120 .</p></div>	https://treatment.plazi.org/id/F11787D0FFBE0C1DFF57FCF6FD73185C	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Chen, Xiao-Hua;Shu, Jiang-Ping;Xu, Yi-Da;Liu, Hong-Mei;Chen, Li-Jun;He, Jiao;Zheng, Xi-Long;Gu, Yu-Feng	Chen, Xiao-Hua, Shu, Jiang-Ping, Xu, Yi-Da, Liu, Hong-Mei, Chen, Li-Jun, He, Jiao, Zheng, Xi-Long, Gu, Yu-Feng (2025): Polystichum cretaceum (Polystichum sect. Cyrtogonellum, Dryopteridaceae), a new fern from Guangxi, China. Phytotaxa 690 (2): 276-284, DOI: 10.11646/phytotaxa.690.2.8, URL: https://doi.org/10.11646/phytotaxa.690.2.8
F11787D0FFBB0C1DFF57FB6CFA7C1A19.text	F11787D0FFBB0C1DFF57FB6CFA7C1A19.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Polystichum (sect. Cyrtogonellum)	<div><p>Key to species of Polystichum sect. Cyrtogonellum in China</p><p>1a Lamina imparipinnate and with apical pinna .....................................................................................................................................2</p><p>1b Lamina pinnate and with pinnatifid apex ...........................................................................................................................................4</p><p>2a Apical pinna of different shape as lateral pinnae ............................................................................................................ P. cretaceum</p><p>2b Apical pinna of same shape as lateral pinnae.....................................................................................................................................3</p><p>3a Veins free; pinnae 13–24 pairs, obliquely ovate................................................................................................................ P. minimum</p><p>3b Veins with few areoles along midrib; pinnae fewer than 8(–10) pairs, lanceolate........................................................ P. fraxinellum</p><p>4a Veins with few areoles along midrib .............................................................................................................................. P. × rupestris</p><p>4b Veins free ............................................................................................................................................................................................5</p><p>5a Pinnae narrowly lanceolate, symmetrical or nearly symmetrical at base............................................................................. P. tenuius</p><p>5b Pinnae obliquely deltoid-falcate or falcate-lanceolate, obviously asymmetrical at base ...................................................................6</p><p>6a Pinnae fewer than 20 pairs, falcate-lanceolate ....................................................................................................................... P. simile</p><p>6b Pinnae ca. 30 pairs, obliquely deltoid-falcate................................................................................................................. P. xichouense</p></div>	https://treatment.plazi.org/id/F11787D0FFBB0C1DFF57FB6CFA7C1A19	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Chen, Xiao-Hua;Shu, Jiang-Ping;Xu, Yi-Da;Liu, Hong-Mei;Chen, Li-Jun;He, Jiao;Zheng, Xi-Long;Gu, Yu-Feng	Chen, Xiao-Hua, Shu, Jiang-Ping, Xu, Yi-Da, Liu, Hong-Mei, Chen, Li-Jun, He, Jiao, Zheng, Xi-Long, Gu, Yu-Feng (2025): Polystichum cretaceum (Polystichum sect. Cyrtogonellum, Dryopteridaceae), a new fern from Guangxi, China. Phytotaxa 690 (2): 276-284, DOI: 10.11646/phytotaxa.690.2.8, URL: https://doi.org/10.11646/phytotaxa.690.2.8
