Magnolia lamdongensis Vu &amp; Duy &amp; Phan &amp; Tran &amp; Tiep &amp; Xia 2015, N.V.
Creators: name: Vu, Tien Chinh
name: Duy, Nong Van
name: Phan, Nguyen Huu Toan
name: Tran, Van Tien
name: Tiep, Nong Van
name: Xia, Nianhe
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Magnoliales
Magnoliaceae
Magnolia
Magnolia lamdongensis

description: <i>Magnolia lamdongensis</i> V.T. Tran, N.V. Duy &amp; N.H. Xia, sp. nov. (Figs 2; 3) M. champacifolia <i>J.E. Dandy ex F. Gagnepain</i> <i>, sp.nov. et</i> M. albosericea <i>Chun &amp; Tsoong</i> <i>affinis, sed folia angustato-ovata, apice longa acutata, glabrescentia, petiolus</i> c. <i>3 cm longus, pedunculus</i> c. <i>3 cm longus, juventute papillatus, tepala atque gynoecia glabra.</i> TYPUS. — <b>Vietnam</b>. Lam Dong Province, Lam Ha District, Phu Son Slope, elevation 1300 m asl, 11°55’05”N, 108°10’04”E, 12. VI.2013, <i>N. V. Duy &amp;</i> <i>V. T. Tran 982</i> (holo-, Tay Nguyen Institute for Scientific Research – VTN!); iso-, Vietnam National Museum of Nature – VMN, Da Lat University – DLU!). OTHER MATERIAL EXAMINATED. — <b>Vietnam</b>. Prov. Nha Trang, Ninh Hoa Dist. 17.V.1923, <i>Poilane 6473</i> (syntype of <i>M. champacifolia</i>); <i>ibid</i>., versant sud-est du massif de la Mère et l’Enfant, 1500 m alt., 20.V.1923, <i>6594</i> (P[P00204037, P00204038]!) [by comparison material from paratypes of <i>M. lamdongensis</i> V.T. Tran, N.V. Duy &amp; N.H. Xia, sp. nov.]. — Typus: China, Hainan, <i>How 72740</i> (holo-, of <i>M. albosericea</i>, IBSC!) [by comparison material from other species]. DISTRIBUTION, HABITAT. — South Vietnam, Lam Dong Province. Lam Ha district, Phu Son slope and Hon Nga mountain. Growing sparsely scattered in montane evergreen broad-leaved forest, between 1300 and 1500 m asl, associated with species such as <i>Rhodoleia championii</i> Hook., <i>Castanopsis chinensis</i> (Spreng) Hance, <i>Manglietia chevalieri</i> Dandy, <i>Paramichelia baillonii</i> Hu … So far there are no seedlings and young trees around the mature individuals. PHENOLOGY. — The plants were flowering and fruiting between May and July. VERNACULAR NAME. — Dạ họp lâm &amp;dstrok;ồng [magnolia of Lâm &amp;dstrok;ồng]. ETYMOLOGY. — The specific epithet refers to Lâm &amp;dstrok;ồng Province. DESCRIPTION Evergreen trees, to 4 m tall and 15 cm in stem diam.; bark grayish-brown, rough. Twigs slender 0.3-0.5 cm in diam., young twigs covered with densely grayish-white hairs, old twigs with elevated lenticels; terminal buds grayish-white hairy. Leaves spirally arranged, mature leaf blade rigid and leathery, narrowly ovate, glabrous, 25-35 × 5-8.5 cm; base narrowly cuneate; apex acuminate, <i>c.</i> 2 cm; margins slightly undulate; midvein abaxially prominent, with elevated long lenticels, lateral veins 14-20 on each side, abaxially prominent, reticulate veins dense and prominent on both surface when dry; petiole <i>c</i>. 3 cm long, expanded at base, densely white papillate when young, stipular scar nearly reaching apex of petiole. Peduncle erect, <i>c.</i> 2 × 0.4 cm, 3-4 internodes, densely white papillate. Flower terminal, solitary, ovoid, yellowish-white, 2-2.5 × 1.5- 2 cm; two spathaceous bracts, <i>c.</i> 2.5 cm, densely white papillate outside; pedicel inconspicuous. Tepals 9, all glabrous, in 3 whorls and different from each other; 3 outer tepals obovate-oblong, thin, 1-1.5 × 2-2.5 cm, apex slightly obtuse; 3 middle tepals obovate, thick, 0,8-1.3 × 1.5-2 cm, apex obtuse; inner tepals obovate, thick, 1.2- 1.5 × 0.5-0.8 cm, apex obtuse or slight acute. Stamens in 4-5 ranges, 70-80, unequal, dehiscing introrsely, apex triangular, acute, 8-10 × 1-1.5 mm, scarred into ventral inner tepals ca. 7 mm long. Gynoecium narrowly obovoid to ellipsoid, white, <i>c.</i> 7 × 1 mm, glabrous; stigmas <i>c.</i> 5-6 mm long, reflexed. Ovules 2, irregular with 3 winged-shape and 3 slight deep-set faces, <i>c.</i> 0.7 mm long. Fruit narrowly ellipsoid, 3.5-4 × 1-1.5 cm, carpels 13-15, dorsally dehiscent, glabrous, apex with an outcurved beak 1-3 mm long. Seeds 1-2, seed irregularly polygonal, testa pink, hilum connected to placenta by filiform funiculus, <i>c.</i> 0.8 × 0.4 mm. REMARKS This remarkable species is very similar to <i>Magnolia champacifolia</i> J. E. Dandy ex F. Gagnepain, sp. nov. and <i>alboserisea</i> Chun &amp; Tsoong in certain characters, but differs by leaf blades narrowly ovate, glabrous, apex long acuminate, petiole <i>c.</i> 3 cm long, tepals short and glabrous, peduncle <i>c.</i> 3 cm long and densely papillate when young, gynoecium glabrous.
description: Published as part of <i>Vu, Tien Chinh, Duy, Nong Van, Phan, Nguyen Huu Toan, Tran, Van Tien, Tiep, Nong Van &amp; Xia, Nianhe, 2015, Additions to the Vietnamese species of Magnolia L., sect. Gwillimia DC. (Magnoliaceae), pp. 13-18 in Adansonia 37 (1)</i> on pages 14-18, DOI: 10.5252/a2015n1a2, http://zenodo.org/record/4598823