Tên Khoa học: Magnolia lamdongensis TV Tien, NV Duy & NH XiaTên tiếng Anh: Tên tiếng Việt: Ngọc lan lâm đồngTên khác:
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, c. 2 cm; margins slightly undulate; midve in 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 c. 3 cm long, expanded at base, densely white papillate when young, stipular scar nearly reaching apex of petiole. Peduncle erect, c. 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, c. 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, c. 7 × 1 mm, glabrous; stigmas c. 5-6 mm long, reflexed. Ovules 2, irregular with 3 winged-shape and 3 slight deep-set faces, c. 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, c. 0.8 × 0.4 mm.
This remarkable species is very similar to Magnolia champacifolia J. E. Dandy ex F. Gagnepain, sp. nov. and alboserisea Chun & Tsoong in certain characters, but diffrs by leaf blades narrowly ovate, glabrous, apex long acuminate, petiole c. 3 cm long, tepals short and glabrous, peduncle c. 3 cm long and densely papillae when young, gynoecium glabrous