taxonID	type	description	language	source
2DBEF41FE3E15CCC914CF9AC10109E2E.taxon	description	Figs 1, 2	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
2DBEF41FE3E15CCC914CF9AC10109E2E.taxon	diagnosis	Diagnosis. Mitrephora langsuanensis is similar to M. macclurei Weerasooriya & R. M. K. Saunders, but differs in having: leaves with more secondary veins (7 - 14 pairs), sometimes with domatia abaxially; yellow outer petals with pink stripes, densely hairy abaxially, and with a margin that becomes undulate with age; more carpels per flower (10 - 12); and longer fruiting pedicels (20 - 25 mm).	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
2DBEF41FE3E15CCC914CF9AC10109E2E.taxon	description	Description (from cultivated material). Small trees, to 4 m (in cultivation). Young branches densely pubescent. Leaf laminas coriaceous, (elliptic-) lanceolate, (5.5 -) 8 - 22 by 3 - 5 cm, base obtuse or rounded, apex acute to acuminate, glossy, glabrous adaxially, sparsely to moderately pubescent (sometimes pilose) abaxially, secondary veins 7 - 14 pairs per leaf, sometimes with domatia at axils of secondary veins abaxially; petioles 6 - 12 mm long, moderately pubescent. Inflorescence rachides simple, with rachis internodes remaining short, 2 - 4 mm long, 2 - 3 - flowered, densely pubescent; pedicels 23 - 30 mm long. Sepals free, broadly ovate, not imbricate, 4 - 6 by 5.5 - 6.5 mm, densely pubescent abaxially, glabrous to sparsely pubescent, denser at margin adaxially. Outer petals creamy white, turning yellow with pink stripes, ovate, 20 - 27 by 15 - 17 mm, not clawed, margin undulate with age, acute, densely pubescent ab- and adaxially. Inner petals with greenish-yellow claw, purple towards apex with a yellow stripe, 13 - 15 by 9 - 11 mm, claw incurved, densely pubescent ab- and adaxially. Stamens 1.2 - 1.3 mm long, connective truncate, glabrous. Carpels 10 - 12 per flower, 2 - 2.7 mm long; ovary oblong, 1.3 - 1.6 mm long, moderately pubescent; stigma subglobose, 0.4 - 0.6 mm long, hairy; ovules 4 - 8 per carpel. Fruits with up to 12 monocarps, borne on a pedicel 20 - 25 mm long, 3 - 5 mm wide, densely pubescent. Monocarps yellow when ripe, ellipsoid, ovoid to oblong-ellipsoid, 20 - 40 by 17 - 20 mm, smooth, with longitudinal ridge, sparsely pubescent; stipes 16 - 20 mm long, moderately pubescent. Seeds 2 - 6 per monocarp, semi-lenticular (lowermost and uppermost within monocarp) or discoid (others), 10 - 13 by 5 - 8 mm, glabrous, pitted.	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
2DBEF41FE3E15CCC914CF9AC10109E2E.taxon	distribution	Distribution and habitat. Endemic to Chumphon Province, Peninsular Thailand (Fig. 3). Growing on limestone hill in tropical rain forest; ca. 100 m alt.	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
2DBEF41FE3E15CCC914CF9AC10109E2E.taxon	etymology	Etymology. From the name Lang Suan district, Chumphon Province.	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
2DBEF41FE3E15CCC914CF9AC10109E2E.taxon	materials_examined	Additional specimens examined (paratypes). Thailand: Pathum Thani Province, Khlong Luang District, TISTR Annonaceae collection plot, ca. 5 m alt., 23 June 2022, P. Chalermglin 650623 / 1 (originally from Phu Muang temple, Lang Suan District, Chumphon Province, Peninsular Thailand, ca. 100 m alt.) (PSU).	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
2DBEF41FE3E15CCC914CF9AC10109E2E.taxon	discussion	Discussion. Mitrephora langsuanensis resembles M. macclurei Weerasooriya & R. M. K. Saunders, but differs in having leaves with or without domatia on abaxial leaf surface (absent in M. macclurei), and a densely hairy indument abaxially (vs sparsely hairy). The flowers of Mitrephora langsuanensis have yellow outer petals with pink stripes (vs yellow petals without pink stripes in M. macclurei), margins that undulate with age (not undulate in M. macclurei), densely hairy indument abaxially (vs sparsely hairy), more carpels (10 - 12 vs 7 - 8) and longer fruiting pedicels (20 - 25 mm vs ca. 13 mm). Mitrephora langsuanensis also resembles M. wangii Hu from China (Weerasooriya and Saunders 2010), but differs in its leaf laminas that are densely pubescent (sparsely hairy in M. wangii), sometimes with domatia at axils of secondary veins abaxially (absent in M. wangii), outer petals with pink stripes (absent in M. wangii), longer fruiting pedicels (10 - 16 mm in M. wangii) and longer monocarp stipes (9 - 13 mm in M. wangii).	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
03D709FFE4235561901D46E5D4BF8A3D.taxon	description	Figs 4, 5	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
03D709FFE4235561901D46E5D4BF8A3D.taxon	diagnosis	Diagnosis. Mitrephora sirindhorniae resembles M. tomentosa Hook. f. & Thomson, but is distinguished by its leaves that are sparsely hairy abaxially, larger sepals (8 - 10 by 10 - 12 mm), larger outer petals (40 - 60 by 22 - 35 mm), larger inner petals (14 - 16 by 14.5 - 15 mm), longer flowering pedicels (25 - 27 mm), shorter monocarp stipes (2.5 - 8 mm) and monocarps with a longitudinal ridge.	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
03D709FFE4235561901D46E5D4BF8A3D.taxon	description	Description (from cultivated material). Small trees, to 4 m (in cultivation). Young branches densely pubescent. Leaf laminas subcoriaceous, (oblong-) lanceolate, 7 - 15 by 1.5 - 6 cm, base slightly oblique, broadly cuneate to slightly rounded, apex acute to rarely acuminate, glossy, glabrous adaxially, sparsely pubescent (denser on midrib) abaxially, secondary veins 8 - 12 pairs per leaf, without domatia; petioles 4 - 7 mm long, densely pubescent. Inflorescence rachides simple, with rachis internodes remaining short, 3 - 5 mm long, 2 - 3 - flowered, densely pubescent; pedicels 25 - 27 mm long. Sepals free, ovate, not imbricate, 8 - 10 by 10 - 12 mm, densely pubescent abaxially, glabrous except densely pubescent at margin adaxially. Outer petals greenish-yellow, turning yellow, (broadly) oblanceolate, 40 - 60 by 22 - 35 mm, not clawed, margin undulate with age, apex acute, sparsely pubescent ab- and adaxially. Inner petals pale yellow with purple stripes apically, 14 - 16 by 14.5 - 15 mm, claw slightly incurved, densely pubescent ab- and adaxially. Stamens 1 - 1.5 mm long, connective truncate, glabrous. Carpels 15 - 20 per flower, 2 - 2.5 mm long; ovary oblong 1.2 - 1.5 mm long, sparsely pubescent, stigma club-shaped, 0.5 - 0.8 mm long, hairy; ovules 8 - 10 per carpel. Fruits with 7 - 14 monocarps, borne on a pedicel 20 - 30 mm long, 3 - 5 mm wide, densely pubescent. Monocarps yellow when ripe, (ellipsoid-) obovoid to ovoid, 15 - 30 by 10 - 25 mm, smooth, with longitudinal ridge, densely pubescent; stipes 2.5 - 8 mm long, densely pubescent. Seeds 1 - 10 per monocarp, semi-lenticular (lowermost and uppermost within monocarp) or discoid (others), 9 - 16 by 8 - 9.5 mm, surface glabrous, pitted.	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
03D709FFE4235561901D46E5D4BF8A3D.taxon	distribution	Distribution and habitat. Endemic to Bueng Kan Province, North-Eastern Thailand (Fig. 3). Growing on sandstone hill in dry dipterocarp forest; ca. 200 m alt.	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
03D709FFE4235561901D46E5D4BF8A3D.taxon	etymology	Etymology. Named after Her Royal Highness Maha Chakri Sirindhorn, in honour of her project on plant germplasm conservation in Thailand.	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
03D709FFE4235561901D46E5D4BF8A3D.taxon	materials_examined	Additional specimens examined (paratypes). Thailand: Pathum Thani Province, Khlong Luang District, TISTR Annonaceae collection plot, ca. 5 m alt., 23 July 2020, P. Chalermglin 630723 (originally from small sandstone hill in Bueng Kan Province, North-Eastern Thailand, ca. 200 m alt.) (PSU).	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
03D709FFE4235561901D46E5D4BF8A3D.taxon	discussion	Discussion. Mitrephora sirindhorniae is characterised by its sparsely hairy abaxial leaf surface, flowers with long outer petals (40 - 60 mm) that are broadly oblanceolate, and by its densely pubescent fruits with a longitudinal ridge. The species is morphologically most similar to M. tomentosa Hook. f. & Thomson, from which it differs as its leaves are sparsely hairy abaxially (vs densely hairy), with flowers with larger sepals (8 - 10 by 10 - 12 mm vs 5 - 9 by 5 - 9 mm), outer petals (40 - 60 by 22 - 35 mm vs 16 - 19 [- 34] by 7.5 - 18 mm), inner petals (14 - 16 by 14.5 - 15 mm vs 8.5 - 16.5 by 7 - 12.5 mm), and longer flowering pedicels (25 - 27 mm vs 11 - 23 mm). The monocarp stipes are shorter (2.5 - 8 mm vs 16.5 - 29 [- 39] mm), and the monocarps have a longitudinal ridge.	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
7649BDD1EE195E598B1E29B51FE6CACA.taxon	description	Figs 6, 7	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
7649BDD1EE195E598B1E29B51FE6CACA.taxon	diagnosis	Diagnosis. Mitrephora sukhothaiensis is distinct from all other species in having a combination of outer petals that reflex at maturity as well as inner petals that have inwardly folded marginal protrusions at the midpoint adaxially.	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
7649BDD1EE195E598B1E29B51FE6CACA.taxon	description	Description (from cultivated material). Shrubs, to 2 m (in cultivation). Young branches densely pubescent. Leaf laminas coriaceous, (elliptic-) lanceolate or rarely ovate-lanceolate, 6 - 22 by 2.5 - 8 cm, base rounded to slightly cordate, apex acute to acuminate, glossy, glabrous (except midrib pubescent) adaxially, moderately to sparsely pubescent abaxially, secondary veins 6 - 14 pairs per leaf, with domatia; petioles 3 - 8 mm long, moderately pubescent. Inflorescence rachides simple, with rachis internodes remaining short, 1 - 3 mm long, 2 - 3 - flowered, densely pubescent; pedicels 8 - 17 mm long. Sepals united at base, broadly ovate, not imbricate, 4 - 5.5 by 4 - 5.5 mm, densely pubescent ab- and adaxially. Outer petals creamy white to yellow, ovate, 12 - 17 by 9 - 12 mm, reflexing when mature, not clawed, margin not undulate, apex obtuse, densely pubescent ab- and adaxially. Inner petals greenish-yellow with purple spot towards apex, 10 - 12 by 5 - 6 mm, claw incurved, densely pubescent abaxially, densely hairy with long hairs towards apex adaxially, with inwardly folded marginal protrusions at the midpoint adaxially. Stamens 0.8 - 1.3 mm long, connective truncate, glabrous. Carpels 12 - 20 per flower, 1.6 - 2 mm long; ovary ellipsoid to oblong-ellipsoid, 1.3 - 1.5 mm long, moderately hairy; stigma globose, 0.3 - 0.5 mm long, hairy; ovules 6 - 10 per carpel. Fruits with up to 16 monocarps, borne on a pedicel 15 - 25 mm long, 4 - 6 mm wide, densely pubescent. Monocarps yellow when ripe, (ellipsoid-) ovoid to subglobose, 13 - 20 by 10 - 16 mm, smooth, without longitudinal ridge, densely pubescent; stipes 15 - 22 mm long, densely pubescent. Seeds 2 - 6 per monocarp, semi-lenticular (lowermost and uppermost within monocarp) or discoid (others), 5 - 10 by 5 - 6 mm, glabrous, pitted.	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
7649BDD1EE195E598B1E29B51FE6CACA.taxon	distribution	Distribution and habitat. Endemic to Sukhothai Province, Northern Thailand (Fig. 3). Growing in mixed deciduous forest; ca. 360 m alt.	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
7649BDD1EE195E598B1E29B51FE6CACA.taxon	etymology	Etymology. From the name Sukhothai province.	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
7649BDD1EE195E598B1E29B51FE6CACA.taxon	materials_examined	Additional specimens examined (paratypes). Thailand: Pathum Thani Province, Khlong Luang District, TISTR Annonaceae collection plot, ca. 5 m alt., 20 November 2020, P. Chalermglin 631120 (originally from Si Satchanalai District, Sukhothai Province, Northern Thailand, ca. 360 m alt.) (SING); ibid. 1 May 2022, P. Chalermglin 650501 (KKU, PSU); ibid., 23 June 2022, P. Chalermglin 650623 / 2 (PSU).	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
7649BDD1EE195E598B1E29B51FE6CACA.taxon	discussion	Discussion. Mitrephora sukhothaiensis is easily distinguished from all other species in two key characters: its outer petals that reflex at maturity, and its inner petals that have inwardly folded marginal protrusions at the midpoint adaxially. Mitrephora sukhothaiensis also resembles M. tomentosa in the appearance of the fruit (monocarp shape and surface) and seeds, but differs in its shrubby habit, growing to 2 m in height (vs small to medium trees to ca. 20 m), sparsely to moderately hairy leaf indument abaxially (vs densely hairy), outer petals that reflex at maturity and without undulate margins), inner petals with inwardly folded marginal protrusions, and narrower seeds (5 - 6 mm vs ca. 8 mm).	en	Leeratiwong, Charan, Chalermglin, Piya, Saunders, Richard M. K. (2023): Three new species of Mitrephora (Annonaceae) from Thailand. PhytoKeys 218: 93-107, DOI: http://dx.doi.org/10.3897/phytokeys.218.91582, URL: http://dx.doi.org/10.3897/phytokeys.218.91582
