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Tên Khoa học: Magnolia lamdongensis TV Tien, NV Duy & NH Xia
Tên tiếng Anh:
Tên tiếng Việt: Ngọc lan lâm đồng
Tên khác:

MÔ TẢ CHUNG

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

 

ẢNH

Magnolia lamdongensis TV Tien, NV Duy 1.jpg at www.BotanyVN.com

Ảnh 1. Magnolia lamdongensis TV Tien, NV Duy 1.jpg

 

Magnolia lamdongensis TV Tien, NV Duy 2.jpg at www.BotanyVN.com

Ảnh 2. Magnolia lamdongensis TV Tien, NV Duy 2.jpg

 

PHÂN LOẠI KHOA HỌC
Giới: Thực vật
Ngành: Magnoliophyta
Lớp: Magnoliopsida
Bộ: Magnoliales
Họ: Magnoliaceae
Chi: Magnolia

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