Euploca marifolia (J. Koeenig ex Retz.) Ancy & P.Javad, Nord. J. Bot. 38(11): 2. 2020.

Rueangsawang, Kanokorn & Chantaranothai, Pranom, 2023, A taxonomic synopsis of Heliotropiaceae and new combinations in Heliotropium from Thailand, PhytoKeys 232, pp. 189-210 : 189

2. Euploca marifolia (J. Koeenig ex Retz.) Ancy & P.Javad, Nord. J. Bot. 38(11): 2. 2020.

Fig. 2B

Heliotropium marifolium J. Köenig ex Retz., Observ. Bot. 2: 8. 1781. Type: Asia, 1781, Köenig 7052 (holotype LD [LD1748458 image!]).

Heliotropium scabrum Retz., Observ. Bot. 2: 8. 1781. Type: India, Coromandel coast, Köenig s.n. ([C10008736!]).

Euploca scabra (Retz.) M.W.Frohl. & M.W.Chase, Phytotaxa 434: 19. 2020. Type as above.

Type.

Based on Heliotropium marifolium J. Köenig ex Retz.

Distribution.

Pakistan, India, Sri Lanka, China, Cambodia, Vietnam, Thailand (Fig. 1B ), Peninsular Malaysia, Java.

Ecology.

In the open deciduous forest, dry secondary forest; 50-300 m alt., flowering and fruiting from January to October.

Specimens examined.

Thailand, Eastern: Nakhon Ratchasima, Nong Sarai, 300 m alt., 5 Sept 1963, Smitinand & Sleumer 8359 (K, L). South-western: Kanchanaburi, Si Sawat, 16 Nov 1917, van Beusekom et al. 3809 (BKF, L); Sai Yok, 15 Aug 1967; Hin Lat, 50 m alt., 28 Nov 1957, Smitinand 3875 (BKF); Khao Ai Mao, 15 Nov 1968, Sangkhachand 1576 (BKF, K); ibid., 40 m alt., 8 July 1922, Marcan 889 (BM, K); Thong Pha Phum, 215 m alt., 6 Aug 2012, Middleton et al. 5261 (BKF, E); Phetchaburi, Kaeng Krachan NP, 285 m alt., 11 Aug 2002, Middleton et al. 972 (BKF, E, K). Central : Sing Buri, Mueang , 5 Jun 1880, Put 2614 (BM, BK, K, BKF), Suphan Buri, Bang Plama , 22 Sept 1930, Kerr s.n. (K); Phra Nakhon Si Ayutthaya, 9 Sept 1922, Marcan 1000 (ABD, BM, K) .

Diagnostic characters.

Euploca marifolia is characterised by being prostrate, much-branched with stiff bristly white hairs on the stems and leaves, lanceolate leaves (6-17 × 1-4 mm), revolute margin and inflorescence with leaf-like bracts.

Figures

Figure 1. Distribution of Heliotropiaceae from Thailand, based on the specimens examined.

Figure 2. Species of Euploca from Thailand A E. bracteata (R. Br.) M. W. Frohl. & M. W. Chase B E. marifolia (J. Koeenig ex Retz.) Ancy & P. Javad C-E E. ovalifolia (Forssk.) Diane & Hilger C inflorescence D dehiscing fruit separating into four nutlets A Photo by Pramote Triboun C-E Photos by Siriporn Zungsontiporn.