Cyrtandromoea grandiflora, a new generic record for Vietnam, and a key to Vietnamese Phrymaceae Author Quang, Bui Hong Department of Botany, Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam. & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam. Author Bach, Tran The Department of Botany, Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam. & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam. Author Hai, Do Van Department of Botany, Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam. & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam. Author Hoan, Duong Thi 0000-0002-4298-5720 Department of Botany, Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam. & duongthihoan @ yahoo. com; https: // orcid. org / 0000 - 0002 - 4298 - 5720 duongthihoan@yahoo.com Author Huong, Nguyen Thi Thanh Department of Botany, Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam. & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam. Author Han, Le Ngoc 0000-0003-2657-5091 Department of Botany, Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10072, Vietnam. & lengochan 7 @ gmail. com; https: // orcid. org / 0000 - 0003 - 2657 - 5091 lengochan7@gmail.com Author Nuraliev, Maxim S. Department of Higher Plants, Biological Faculty, M. V. Lomonosov Moscow State University, 1, 12, Leninskie Gory, Moscow 119234, Russia. & Joint Russian-Vietnamese Tropical Scientific and Technological Center, Cau Giay, Hanoi 10072, Vietnam. text Phytotaxa 2023 2023-04-04 591 2 147 154 http://dx.doi.org/10.1094/PDIS-04-22-0755-PDN journal article 56449 10.11646/phytotaxa.591.2.6 e55e45a8-1ec0-4b14-8b92-8bf574370a77 1179-3163 7797528 Key to the genera and species of Phrymaceae in the flora of Vietnam Partly based on Hong et al. (1998) , Yamazaki (1985 , 1990 ), Bean (1997) , Fischer (2004) , Barker et al. (2012) , Liu et al. (2020) . The genera included in the key are treated within the following tribes:Cyrtandromoeeae ( Cyrtandromoea ), Leucocarpeae ( Erythranthe ), Mimuleae ( Glossostigma , Microcarpaea , Mimulus ), Phrymeae ( Phryma ) ( Stevens 2001 onwards, Liu et al. 2020 ). 1. Gynoecium pseudomonomerous (ovary unilocular); fruit a 1-seeded achene ............................................ Phryma ( P. leptostachya ) - Gynoecium with both carpels fertile (ovary bilocular); fruit a many-seeded capsule .......................................................................2 2. Suffrutescent perennial herbs; stem erect, sometimes woody at base; inflorescence cymose; corolla usually with 2 raised yellow ridges; stamens 4 .............................................................................................................................. Cyrtandromoea ( C. grandiflora ) - Annual or perennial herbs; stem erect to prostrate; inflorescence racemose (often described as single flowers); corolla various; stamens 2 or 4.....................................................................................................................................................................................3 3. Small annual herbs, glabrous (rarely with hairy calyx); stamens 2 or 4; anthers 1-celled.................................................................4 - Annual or perennial herbs of various size, glabrous or with various indumentum; stamens 4; anthers 2-celled ..............................5 4. Stem short, with slender creeping stolons arising from leaf axils; flowers subsessile to pedicellate; calyx terete, with 3–4 unequal lobes; stamens 2 or 4 ( 2 in the Vietnamese species), if stamens 2 than 2 staminodes present............... Glossostigma ( G. diandrum ) - Stem prostrate, rooting at nodes; flowers sessile to subsessile (rarely long pedicellate); calyx terete to 5-ribbed, with 5 equal lobes; stamens 2, staminodes absent ................................................................................................................... Microcarpaea ( M. minima ) 5. Leaf venation basal to suprabasal acrodromous; corolla variously coloured (yellow with red spots in the Vietnamese species)....... ................................................................................................................................................................. Erythranthe ( E. nepalensis ) - Leaf venation brochidodromous or basal acrodromous; corolla blue to violet, purplish, light pink to nearly white, or rarely (outside Vietnam ) yellow ............................................................................................................................................................... 6 ( Mimulus ) 6. Plants floating in ponds and rice fields, with prostrate stem; leaves with distinct petioles; leaf blade orbicular, with entire margin; calyx terete, much shorter than corolla; corolla purple; capsule exserted from calyx ........................................ Mimulus orbicularis - Plants terrestrial, with erect stem; leaves sessile; leaf blade linear-oblong or oblanceolate, with slightly serrate margin; calyx narrowly winged, ca. 2/3 as long as corolla; corolla white to pale blue; capsule included in calyx......................... Mimulus strictus