Camellia proensis (Theaceae, sect. Piquetia), a new species from Southern Vietnam Author Hoi, Quach Van 0000-0002-3691-941X Tay Nguyen Institute for Scientific Research, Vietnam Academy of Science and Technology, Xo Viet Nghe Tinh str. 116, Dalat, 66107, Vietnam. & School of Natural Sciences, Far Eastern Federal University, Sukhanova str. 8, Vladivostok, 690090, Russia. & quachvanhoi @ gmail. com; https: // orcid. org / 0000 - 0002 - 3691 - 941 X quachvanhoi@gmail.com Author Dung, Luong Van 0000-0001-5985-1975 Faculty of Biology, Dalat University, Phu Dong Thien Vuong str. 01, Dalat, 66106, Vietnam. & dunglv @ dlu. edu. vn; https: // orcid. org / 0000 - 0001 - 5985 - 1975 dunglv@dlu.edu.vn Author Doudkin, Roman V. School of Natural Sciences, Far Eastern Federal University, Sukhanova str. 8, Vladivostok, 690090, Russia. & Botanical Garden-Institute, Far-East Branch, Russian Academy of Sciences, Makovskii str. 142, Vladivostok, 690024, Russia. Author Averyanov, Leonid V. 0000-0001-8031-2925 Komarov Botanical Institute, Russian Academy of Sciences, Prof. Popov str. 2, St. Petersburg, 197376, Russia. & av _ leonid @ mail. ru; https: // orcid. org / 0000 - 0001 - 8031 - 2925 av_leonid@mail.ru Author Thinh, Bui Bao 0000-0002-3826-1199 School of Natural Sciences, Far Eastern Federal University, Sukhanova str. 8, Vladivostok, 690090, Russia. & buibaothinh 9595 @ gmail. com; https: // orcid. org / 0000 - 0002 - 3826 - 1199 buibaothinh9595@gmail.com Author Lieu, Nguyen Thi 0000-0002-3691-941X Faculty of Biology, Dalat University, Phu Dong Thien Vuong str. 01, Dalat, 66106, Vietnam. & lieunt _ sh @ dlu. edu. vn; https: // orcid. org / 0000 - 0002 - 3691 - 941 X lieunt_sh@dlu.edu.vn Author Truong, Luu Hong 0000-0002-7036-7081 Southern Institute of Ecology, Vietnam Academy of Science and Technology, 1 D, TL 29 str., Thanh Loc Ward, District 12, Ho Chi Minh city, 71500, Vietnam. & hongtruongluu @ gmail. com; https: // orcid. org / 0000 - 0002 - 7036 - 7081 hongtruongluu@gmail.com text Phytotaxa 2021 2021-01-07 479 1 137 141 http://dx.doi.org/10.11646/phytotaxa.479.1.12 journal article 4496 10.11646/phytotaxa.479.1.12 c0ae70d0-176e-40ed-921b-f428d40ed22b 1179-3163 5413291 Key to Camellia proensis and related species: 1a. Flowers red .........................................................................................................................................................................................2 1b. Flowers orange or yellow ...................................................................................................................................................................3 2a. Ovary 3 .......................................................................................................................................................................... C. honbaensis 2b. Ovary 5 ...............................................................................................................................................................................................4 3a. Flowers orange ........................................................................................................................................................... C. dongnaiensis 3b. Flowers yellow ...................................................................................................................................................................................5 4a. Petal 5–6, campanulate........................................................................................................................................................... C. longii 4b. Petal 8 or more, rotate .................................................................................................................................................... C. piquetiana 5a. Young branches and leaves hairy .................................................................................................................................... C. dalatensis 5b. Young branches and leaves glabrous..................................................................................................................................................6 6a. Leaves narrowly lanceolate; ovary (3)–4; mature fruits capsular, corky shape, 3.0– 3.5 cm in diameter, 1.5–2.0 cm tall .................. ..................................................................................................................................................................................... C. sonthaiensis 6b. Leaves oblong-elliptic; ovary 4–5 locular; mature fruits capsular, flat-globose, 8.5–10.0 cm wide, 4.0– 5.5 cm tall ......................... ............................................................................................................................................................................................ C. proensis