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Primulina Diffusa (Gesneriaceae), a New Species Endemic to the Karst

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Primulina Diffusa (Gesneriaceae), a New Species Endemic to the Karst Primulina diffusa (Gesneriaceae), a New Species Endemic to the Karst Limestone Area in Southwestern Guangxi, China Author(s): Shou-Biao Zhou, Xin Hong, Zhong-Lin Li & Fang Wen Source: Annales Botanici Fennici, 51(4):212-216. 2014. Published By: Finnish Zoological and Botanical Publishing Board DOI: http://dx.doi.org/10.5735/085.053.0404 URL: http://www.bioone.org/doi/full/10.5735/085.053.0404 BioOne (www.bioone.org) is a nonprofit, online aggregation of core research in the biological, ecological, and environmental sciences. BioOne provides a sustainable online platform for over 170 journals and books published by nonprofit societies, associations, museums, institutions, and presses. Your use of this PDF, the BioOne Web site, and all posted and associated content indicates your acceptance of BioOne’s Terms of Use, available at www.bioone.org/page/ terms_of_use. Usage of BioOne content is strictly limited to personal, educational, and non-commercial use. Commercial inquiries or rights and permissions requests should be directed to the individual publisher as copyright holder. BioOne sees sustainable scholarly publishing as an inherently collaborative enterprise connecting authors, nonprofit publishers, academic institutions, research libraries, and research funders in the common goal of maximizing access to critical research. Ann. Bot. Fennici 51: 212–216 ISSN 0003-3847 (print) ISSN 1797-2442 (online) Helsinki 12 June 2014 © Finnish Zoological and Botanical Publishing Board 2014 Primulina diffusa (Gesneriaceae), a new species endemic to the karst limestone area in southwestern Guangxi, China Shou-Biao Zhou1,3, Xin Hong1,4, Zhong-Lin Li1 & Fang Wen2,4,* 1) College of Life Sciences, Anhui Normal University, CN-241000 Wuhu, China 2) Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization, Herbarium, Guangxi Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and the Chinese Academy of Sciences, CN-541006 Guilin, China (*corresponding author’s e-mail: [email protected]) 3) The Key Laboratory of Conservation and Employment of Biological Resources of Anhui, CN-241000 Wuhu, China 4) Gesneriad Conservation Center of China, Guangxi Zhuang Autonomous Region and the Chinese Academy of Sciences, CN-541006 Guilin, China 5HFHLYHG0D\ÀQDOYHUVLRQUHFHLYHG)HEDFFHSWHG)HE Zhou, S. B., Hong, X., Li, Z. L. & Wen, F. 2014: Primulina diffusa (Gesneriaceae), a new species endemic to the karst limestone area in southwestern Guangxi, China. — Ann. Bot. Fennici 51: 212–216. Primulina diffusa Xin Hong, Fang Wen & S.B. Zhou (Gesneriaceae), a new species growing in rocky crevices at the foot of a limestone hill near the Sino-Vietnamese border in southwestern Guangxi, China, is described and illustrated. It is morphologi- cally similar to P. hochiensis and P. hochiensis var. rosulata, but can be distinguished E\KDYLQJVLQJOHÁRZHUHGF\PHVVKRUWSHGXQFOH ²FPORQJ QDUURZO\HOOLSWL- FDOWRVXEXODWHEUDFWV²¥FDPP²FPORQJSHGLFHOFDO\[OREHVWKDWDUH GHQVHO\SXEHUXOHQWRQERWKVLGHVDQGÀODPHQWVWKDWDUHJHQLFXODWHQHDUWKHPLGGOH The genus ChiritaRQFHKDGDWOHDVWVSHFLHV distribution center of the genus (Wei et al making it a large genus in Gesneriaceae (Weber During an excursion across the karst lime- +RZHYHULWVVHFWLRQDOGLYLVLRQZDVIRXQG stone hills near the Sino-Vietnamese border in WR EH DUWLÀFLDO DQG XQQDWXUDO DQG WKHUHIRUH WKH D SODQW RI *HVQHULDFHDH ZDV FROOHFWHG E\ genus was recently revised based on molecu- 0U+XD:DQJEXWLWODFNHGÁRZHUVZKLFKZHUH lar data (Möller et al. :DQJ et al IRXQGRQO\LQ$IWHUFDUHIXOO\FRQVXOWLQJWKH Weber et al. $OO VSHFLHV RI WKH VHFWLRQV relevant literature (e. g. Wang et al.:DQJ Gibbosaccus and Chiritopsis, and two species et al. /L :DQJ :HL et al of the section Wentsaiboea, were incorporated Hong et al.:HQet al.DE:HQ into a previously monotypic genus, Primulina. et al;Xet al=KDRet al DQG 0RVW VSHFLHV RI WKDW QHZO\ GHÀQHG JHQXV KDYH many specimens from Chinese and Vietnamese a narrow distribution and many new species herbaria (e.g. NU, BJFU, CDBI, HN, IBK, IBSC, were discovered in recent years, especially in the KUN, PE, VMN, CTC, MO, CDBI) we con- *XDQJ[L=KXDQJ$XWRQRPRXV5HJLRQWKHPDLQ cluded that it was an undescribed species. ANN. BOT. FENNICI Vol. 51 Primulina diffusa, a new species from China 213 Fig. 1. Primulina diffusa (from the holotype). — A: +DELW LQ ÁRZHULQJ ³ B: &XWRSHQ ÁRZHU VKRZLQJ stamens and staminodes. — C: Anthers. — D: Calyx and pistil. — E: Bract lobe, dorsal view showing dense pubescence. — F: Bract lobes, ventral view. Primulina diffusa Xin Hong, Fang Wen, & VSLFXRXV DED[LDOO\ ,QÁRUHVFHQFHV D[LOODU\ ² S.B. Zhou, sp. nova (Figs. 1, 2A–K, 3) RU PRUH XQEUDQFKHG F\PHV VLQJOHÁRZHUHG SHGXQFOH VKRUW ² FP ORQJ FD FP LQ TYPE &KLQD *XDQJ[L =KXDQJ]X $XWRQRPRXV 5HJLRQ diameter, densely erect-puberulent with both &KRQJ]XR FLW\ 'D[LQ &RXQWU\ /HLSLQJ 7RZQ JURZLQJ LQ JODQGXODUDQGHJODQGXODUKDLUVEUDFWVRSSRVLWH rocky crevices at the foot of a limestone hill, 200 m a.s.l., 1RY Á Fang Wen 0173 KRORW\SH,%.LVRW\SH QDUURZO\ HOOLSWLFDO WR VXEXODWH ² PP ORQJ $18 ³PARATYPES6DPHORFDOLW\$XJWang-062 ² PP LQ GLDPHWHU PDUJLQ HQWLUH DSH[ ,%. PDVO1RYHong 20121116 $18 DFXWH RXWVLGH GHQVHO\ SLORVH 3HGLFHO ² FP ETYMOLOGY7KHVSHFLÀFHSLWKHWLVGHULYHGIURPLWVGLI- ORQJFDPPLQGLDPHWHUJODQGXODUSXEHVFHQW fuse habit, resulting from the many stolons growing from leaf axils. &DO\[JUHHQSDUWHGIURPEDVHVHJPHQWVHTXDO HOOLSWLFDO²PPORQJ²PPLQGLDPHWHU Perennial, acaulescent, stoloniferous herb. margin entire, apex acute, outside densely puber- 5KL]RPH F\OLQGULFDO ² FP ORQJ RU ORQJHU ulent. Corolla purple or pale pink, throat with two FD FP LQ GLDPHWHU JODEURXV OHDYHV ² GLVWLQFWO\ HOOLSWLF \HOORZ VSRWV ² FP ORQJ RU PRUH IDVFLFXODWH DQG URVXODWH YHUWLFLOODWH RULÀFH²FPLQGLDPHWHURXWVLGHSXEHUXOHQW SHWLROHF\OLQGULFDOGHQVHO\YLOORXV² ² with both glandular and eglandular hairs, inside ¥ ² FP OHDI EODGH VOLJKWO\ RYDWHHOOLSWLF JODEURXV WXEH LQIXQGLEXOLIRUP FD FP ORQJ RU QHDUO\ URXQGHG ² ¥ ² FP WKLFN limb distinctly 2-lipped, adaxial lip 2-parted to papery, densely villous on both sides, broadly WKH PLGGOH OREHV RYDWH FD ¥ PP DED[LDO cuneate, or cuneate-attenuate to oblique at base, OLS SDUWHG WR WKH EDVH OREHV REOLTXHO\ RYDWH PDUJLQ HQWLUH DSH[ QHDUO\ URXQGHG WR REWXVH WRREORQJODWHUDORQHVFD¥PPWKHFHQWUDO ODWHUDO YHLQV ² RQ HDFK VLGH RI PLGULE FRQ- one ca. 7 ¥PP6WDPHQVDQWHULRUSRVLWLRQ 214 Zhou et al. ANN. BOT. FENNICI Vol. 51 Fig. 2. A–K: Primulina diffusa. — A: Habitat. — B: Habit. — C: Rosette plants showing stolons. — D: Plant and rhizome. — E)URQWDOYLHZRIÁRZ- ers. — F: Flower throat. — G: Lateral view of ÁRZHUV ³ H: Calyx and pistil. — I: Bracts. — J: Abaxial surface of bract. — K: Stigma. — L–O: P. hochiensis. — L: Plants and stolons. — M: Front YLHZ RI ÁRZHU ³ N: Lat- HUDO YLHZ RI ÁRZHU ³ O: Stigma. — P–S: P. hochiensis var. rosulata. — P: Habit. — Q: Lateral YLHZRIÁRZHU³R: Fron- WDO YLHZ RI ÁRZHU ³ S: Stigma. Fig. 3. Primulina diffusa. — A: Habit. — B: Stolons and ÁRZHUV ³ C: Close-up of plant with stolon. ANN. BOT. FENNICI Vol. 51 Primulina diffusa, a new species from China 215 DGQDWHWRFDPPDERYHWKHFRUROODEDVHDQWKHUV Town, Daxin Country, Chongzuo City, south- fused across entire adaxial surfaces, yellow, reni- HDVWHUQ *XDQJ[L =KXDQJ $XWRQRPRXV 5HJLRQ IRUPFD¥PPVOLJKWO\FRQVWULFWHGDWWKH China. PLGGOH JODEURXV ÀODPHQWV SXUSOH JHQLFXODWH HABITAT. Primulina diffusa is locally abun- QHDU WKH PLGGOH FD PP ORQJ VSDUVHO\ JODQ- dant. It is growing in rocky crevices at the foot of GXODU SLORVH VWDPLQRGHV OLQHDU JODEURXV FD a limestone hill in a subtropical evergreen broad- PPORQJDGQDWHWR²PPDERYHWKHFRUROOD leaved forest near the Sino-Vietnamese border in base. Disc annular, margin entire or sometimes southwestern Guangxi, China, at an elevation of VOLJKWO\HURVH²PPKLJK3LVWLOFDPP 200 m a.s.l. The average temperature of Zhong- ORQJRYDU\OLQHDU²PPORQJFDPPLQ ]XR&RXQW\LV&DQGWKHDYHUDJHDQQXDO diameter, densely puberulent with both glandular SUHFLSLWDWLRQRYHUPP DQG HJODQGXODU KDLUV VW\OH ² PP ORQJ FD Primulina diffusa is morphologically, based PP LQ GLDPHWHU GHQVHO\ JODQGXODUSXEHUX- RQ OHDI DQG ÁRZHU VKDSH FORVH WR P. hochien- lent. Stigmas greenish, obtrapeziform, emargin- sis )LJ .²1 FI :HEHU et al DQG P. DWH DW DSH[ ² PP ORQJ &DSVXOH OLQHDU hochiensis var. rosulata )LJ 3²6 FI +XDQJ ²FPORQJFDPPLQGLDPHWHUSXEHUX- &KHQ:HQ :HLD ERWKIRXQGLQ lent. Flowering from November to December. southwestern Guangxi, but there are numerous DISTRIBUTION. China, narrow endemic and GLIIHUHQFHV 7DEOH RQO\NQRZQIURPWKHW\SHORFDOLW\LH/HLSLQJ Table 1. Morphological comparison of Primulina diffusa, P. hochiensis and P. hochiensis var. rosulata. Characters P. diffusa P. hochiensis P. hochiensis var. rosulata Stolons present present absent Rhizome length (cm) 2–4 1.5–2 1.6–2 Petiole length (cm) 1.0–1.6(–2.8) 1-3.5 3.5–6.0 Indumentum of petiole densely villous pubescent very short pubescence Leaf blade size (cm) 1.8–4.0 ¥ 1.5–2.0 2–5.5 ¥ 1.3–3.5 3.5–6.0 ¥ 2.5–4.0 Texture of leaf blade thick papery papery chartaceous Indumentum of leaf blade densely villous on both densely appressed densely appressed sides puberulent puberulent ,QÁRUHVFHQFH VLQJOHÁRZHUHG ÁRZHUHG ²ÁRZHUHG Peduncle length (cm) 1–1.5 4–7 3.0–9.5 Bract shape narrowly elliptical to linear-lanceolate linear subulate Bract size (mm) 2–2.5 ¥ 0.6 3–4 ¥ 1.2 4–5 ¥ 1 3HGLFHOOHQJWK FP ² Indumentum of pedicel glandular pubescent glandular puberulent puberulent Calyx shape elliptical lanceolate-linear to lanceolate-linear subulate Calyx size (mm) 2–2.5 ¥ 1–1.2 4–7 ¥ 0.5–0.8 7–7.5 ¥ 1.5–2.3 Calyx color green purple purple Indumentum of calyx densely
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