Michaelmoelleria (Gesneriaceae), a new lithophilous dwelling genus and species with zigzag corolla tube from southern Vietnam Author Wen, Fang Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guilin Botanical Garden, Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China & Gesneriad Conservation Center of China (GCCC), Guilin Botanical Garden, Chinese Academy of Sciences, Guilin 541006, China & Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China Author Xin, Zi-Bing Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guilin Botanical Garden, Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China & Gesneriad Conservation Center of China (GCCC), Guilin Botanical Garden, Chinese Academy of Sciences, Guilin 541006, China https://orcid.org/0000-0002-0062-6930 Author Fu, Long-Fei Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guilin Botanical Garden, Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China & Gesneriad Conservation Center of China (GCCC), Guilin Botanical Garden, Chinese Academy of Sciences, Guilin 541006, China Author Li, Shu Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guilin Botanical Garden, Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China & Gesneriad Conservation Center of China (GCCC), Guilin Botanical Garden, Chinese Academy of Sciences, Guilin 541006, China Author Su, Lan-Ying Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guilin Botanical Garden, Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China Author Maciejewski, Stephen Gesneriad Conservation Center of China (GCCC), Guilin Botanical Garden, Chinese Academy of Sciences, Guilin 541006, China & The Gesneriad Society, 2030 Fitzwater Street, Philadelphia, PA 19146, USA Author Huang, Zhang-Jie Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guilin Botanical Garden, Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China & Gesneriad Conservation Center of China (GCCC), Guilin Botanical Garden, Chinese Academy of Sciences, Guilin 541006, China Author Do, Truong Van Vietnam National Museum of Nature, Vietnam Academy of Science & Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam & Graduate University of Science and Technology, Vietnam Academy of Science & Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam https://orcid.org/0000-0002-0585-5513 dovantruong_bttn@yahoo.com Author Wei, Yi-Gang Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guilin Botanical Garden, Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China & Gesneriad Conservation Center of China (GCCC), Guilin Botanical Garden, Chinese Academy of Sciences, Guilin 541006, China & Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China weiyigang@aliyun.com text PhytoKeys 2020 146 89 107 http://dx.doi.org/10.3897/phytokeys.146.49731 journal article http://dx.doi.org/10.3897/phytokeys.146.49731 1314-2003-146-89 DE64AF2293085BA198EADB384ECFD70A
Table 1. Comparison of morphological characters Michaelmoelleria, Cathayanthe, Deinostigma and Tribounia.
CharactersMichaelmoelleriaCathayantheDeinostigmaTribounia
Life formperennialperennialperennialprobably annual
Stemglabrescent to glabrous when ageingrhizomatous, stemlessmultifarious, from short and constrictive to procumbent; from glabrous to pubescent and puberulentwith hairs and often hooked at the tip
Leavesalternate on elongate aeriald stem, 12-20 or morefew, 4-8, basalalternate, numerousopposite, numerous
Lea-bladeovate to elliptic, both surfaces glabrousoblanceolate to obovate or elliptic, adaxially whitish to brownish sericeous, abaxially appressed pubescentmultifarious, slightly peltate or not, glabrous or eglandular pubescent on both surfacesovate, densely pubescent adaxially and abaxially mostly with eglandular pubescents (occasional glandular pubescent present in Tribounia grandiflora)
CalyxActinomorphic, 5-parted to the basezygomorphic, 2-lippeddivided to base, elliptic, those on ventral side slightly longer and widerequally 5-partite almost to base
Corollatube narrowly curving to zigzag infundibuliform-tubular, and bent at about 90° angle in the middle of corolla tube, and gradually slightly swollen from the middle to the base of the tube; dramatically enlarged to be trumpet-shaped from the middle of the corolla tube toward the limbtube tubular, nearly straight to slightly bent, slightly gibbous abaxially toward limb, much longer than limbtube infundibuliform, lower lip 3-lobed, upper lip 2-lobed, lobe apices roundedzygomorphic, of a narrow lower tube which widens into an infundibuliform upper tube which has a prominent boss on the dorsal surfacew
Fertile stamens number4222
Ovarycylindric-linear, glabrous, 3.5-4 cm longnarrowly ellipsoid, ca. 6 mm longfusform, long or short, with different indumentum, from glabrous to glandular- and eglandular-puberulentcylindrical, densely glandular pubescent, ca. 6 mm long in T. venosa, 7.5-11.0 mm long in T. grandiflora
Stigma2-lobed, often gathering togethersubcapitate, lower part developingligulate, upper lip usually vestigial and only lower lip developing, broad, flat and weakly 2-lobedcapitate