Sohmaea laxiflora subsp. laxiflora DC.

Saisorn, Witsanu & Chantaranothai, Pranom, 2022, A taxonomic revision of two genera, Pleurolobus and Sohmaea (Leguminosae) in Thailand and Indo-China, Phytotaxa 573 (2), pp. 231-246 : 240

3.2 Sohmaea laxiflora subsp. laxiflora DC. Fig. 2A–B .

Distribution:— India, Nepal, Myanmar, China, Taiwan, Thailand, Malaysia, Indonesia, Timor, and Philippines. Introduced to Senegal and Burkina Faso.

Ecology:—Roadsides or in sunny places of evergreen, lower montane oak mixed with dry dipterocarp, dry evergreen, and mixed deciduous forests; 50–1300 m elev.

Phenology:—Flowering in September–December. Fruiting in September–February.

Notes:—Although, Sohmaea laxiflora is a common species in southeast Asia, but it has never been reported from Cambodia. There are two syntype duplicates of D. macrophyllum Desv. kept at P. The samples of each duplicate were mixed between S. laxiflora and Ototropis megaphylla (Zoll. & Moritzi) H.Ohashi & K.Ohashi. The first duplicate (P02937969) consisted of two leaves of O. megaphylla , mounted on the left side of the sheet. A leaf and inflorescence with flowers and young fruits of S. laxiflora are on the middle and right side of the sheet. The second duplicate (P02937970) consisted of a twig with three leaves and inflorescence (with flowers and young fruits) of O. megaphylla , covering the most part of the sheet, while inflorescence with flowers and young fruits of S. laxiflora are mounted on the right side.

Specimens examined:— THAILAND. Mae Hong Son: Mae Surin waterfall, 1500 m, 24 Sept. 1995, Larsen et al. 46909 (AAU, SING) & Mueang Mae Hong Son, 311 m, 15 Dec. 2007, Tanaka et al. HN8407 (QBG, TI); Chiang Mai: Mae Rim, QBG, 22 Oct. 1997, BGO.Staff 9749 (QBG-2 sheets), Doi Suthep-Pui National Park, 900 m, 1 Oct. 2000, Chamsai 123 (CMUB), Doi Chiang Dao, 700 m, 12 Dec. 1990, Dy Phon 86/90 (P), Doi Chiang Dao Wildlife Sanctuary, 540 m, 23 Nov. 1995, Gardner H112 (CMUB, L), Doi Suthep, 12 Oct. 1921, Hayata s.n. (TI), Doi Suthep, 427 m, 4 Oct. 1910, Kerr 1456 (C, L), Mae Taeng, Pah Poo Chom village, Khrueasan MS824 (QBG), Doi Chiang Dao, 600–1300 m, 25 Sept. 1971, Murata et al. T-14979 (BKF, KYO-3 sheets, TI), en route from Mae Klang waterfall to Sop Aep, 350–700 m, 1 Oct. 1971, Murata et al. T-15508 (KYO), Hot, Mai Mueang Nao Arboretum, 970 m, 29 Sept. 2001, Sankamethawee 289 (BKF, CMUB), Doi Chiang Dao, 450–1300 m, 28 Oct. 1979, Shimizu et al. T-21010 (KYO), Om Koi, 950–1100 m, 18 Oct. 1979, Shimizu et al. T-19226 (BKF, KYO), Mae Rim, QBG, 860 m, 30 Oct. 2014, Tanming 726 (QBG) & Doi Chiang Dao, 1000 m, 25 Sept. 1971, Vidal 5156 (AAU, P); Chiang Rai: Doi Tung, 800 m, 24 Sept. 1967, Iwatsuki et al. T-10938 (BKF, KYO, L, TI), Khunkorn waterfall, 700 m, 7 Dec. 1997, KK 646 (BCU-2 sheets), Pan, Doi Luang National Park, 623 m, 2 Nov. 2015, Muangyen 186 (QBG), Tham Luang-Khun Nam Nang Norn National Park, 1181 m, 4 Nov. 2011, Norsaengsri & Tathana 8292 (QBG) & Mae Fa Luang, Teut Tai, 1060 m, 23 Oct. 2006, Palee 1056 (CMUB, QBG); Phayao: Mueang Phayao, Doi Luang National Park, 600 m, 25 Sept. 1997, Petrmitr 122 (CMUB, L); Nan: Tha Wang Pha, Ban Sop Khun, 500 m, 14 Nov. 1993, Larsen et al. 44357 (AAU, SING); Lampang: Chae Hom, 325 m, 26 Oct. 2012, Maxwell 12-281 (CMUB, QBG), Mueang Pan, Chae Son National Park, 550 m, 16 Jan. 1997, Panatkool 31 (CMUB) & en route from Pang La to Huai Tak, 350 m, 24 Sept. 1967, Shimizu et al. T-10753 (AAU, BKF, KYO, L, TI); Uttaradit: Ban Nam Pad, 700 m, 29 Oct. 2010, Pongamornkul 2739 (KYO, PSU, QBG); Loei: Phu Ruea National Park, 13 Nov. 2005, Hanmontri 4 (KKU) & Phu Kradueng, 21 Oct. 1967, Prayad 1069 (BK); Sakon Nakhon: Phu Phan National Park, 13 Nov. 1999, Leeratiwong 99-183 (KKU-2 sheets); Khon Kaen: Phu Pha Man National Park, 377.3 m, 24 Oct. 2007, Norsaengsri & Lakoet 2773 (QBG); Buriram: en route from Buriram city to Sateuk, 5 Oct. 1984, Murata et al. T-37540 (KYO); Kanchanaburi: Sai Yok, Mahidol University Kanchanaburi Campus, 200 m, 25 Oct. 2006, Chongko 590 (CMUB), Sangkhla Buri, Saneh Pawn village, 220 m, Dec. 2003, Kansuntisukmongkol 1088 (CMUB), Sai Yok, 170 m, 22 Dec. 1961, Larsen 8904 (C), Si Sawat, Ban Khao Lek, 500–600 m, 21 Oct. 1994, Nisit 94102113 (BK), Si Sawat, Erawan National Park, 550 m, 3 Nov. 1979, Shimizu et al. T-21643 (BKF, KYO, L), Huai Bankau, 800 m, 8 Nov. 1972, van Beusekom et al. 3504 (BKF, C, KYO, P, L) & Si Sawat, Erawan National Park, 1 Nov. 2003, van de Bult 707 (BKF, CMUB); Chanthaburi: Pong Nam Ron, 7 Nov. 1955, Sangkhachand 556 (BKF, TI) & Pong Nam Ron, Ban Thalu, 150 m, 24 Oct. 1965, Smitinand 3617 (L); LAOS. Xieng Khouang: Nong Het, 1800 m, Poilane 16832; Champasak: Bassac, Thorel 2591 ( Dy Phon et al, 1994); CAMBODIA. Mondulkiri: Bord de route, 698 m, 28 Oct. 2006, Long et al. CL313 (P), Sen Monorom, 578 m, 3 Nov. 2016, Tagane et al. 7204 (FU) & Sen Monorom, 527 m, 5 Nov. 2016, Yahara et al. 7395 (FU); VIETNAM. Tonkin: without locality, Bon 4923 (BO) & without locality, Petelot 5917 (HNU); Lao Cai: Sa Pa, 25 Sept. 1963, Khoi 823 (HN); Dac Lac: Hoa Son, 24 Dec. 1979, Khoi & Tue 422 (HN-2 sheets); Dong Nai: Bien Hoa, 18 Nov. 1932, Poilane 21393 (AAU) & Bien Hoa, Dinh Quan, 20 Nov. 1932, Poilane 21399 (L); Without province provided: July 1927, Petelot 3083 (SING).

Figures

FIGURE 2. A.–B. Sohmaea laxiflora: A. Habit; B. Infructescence; C.–D. S. teres: C. Habit; D. Inflorescence with flowers and immature pods. Photos A.–B. by the first author; C.–D. by T. Srisuk.