Additions to the Vietnamese species of Magnolia L., sect. Gwillimia DC. (Magnoliaceae) Author Vu, Tien Chinh Author Duy, Nong Van Author Phan, Nguyen Huu Toan Author Tran, Van Tien Author Tiep, Nong Van Author Xia, Nianhe text Adansonia 2015 2015-06-26 37 1 13 18 journal article 10.5252/a2015n1a2 0385c7af-c1a3-4599-ab2e-1e46e9ecbd90 1639-4798 4598823 Magnolia lamdongensis V.T. Tran, N.V. Duy & N.H. Xia, sp. nov. ( Figs 2 ; 3 ) M. champacifolia J.E. Dandy ex F. Gagnepain , sp.nov. et M. albosericea Chun & Tsoong affinis, sed folia angustato-ovata, apice longa acutata, glabrescentia, petiolus c. 3 cm longus, pedunculus c. 3 cm longus, juventute papillatus, tepala atque gynoecia glabra . TYPUS . — Vietnam . Lam Dong Province , Lam Ha District , Phu Son Slope , elevation 1300 m asl , 11°55’05”N , 108°10’04”E , 12. VI.2013, N . V . Duy & V . T . Tran 982 (holo-, Tay Nguyen Institute for Scientific Research – VTN!); iso-, Vietnam National Museum of Nature – VMN, Da Lat University – DLU !). OTHER MATERIAL EXAMINATED. — Vietnam . Prov. Nha Trang, Ninh Hoa Dist. 17.V.1923 , Poilane 6473 ( syntype of M. champacifolia ); ibid ., versant sud-est du massif de la Mère et l’Enfant, 1500 m alt., 20.V.1923 , 6594 (P[P00204037, P00204038]!) [by comparison material from paratypes of M. lamdongensis V.T. Tran, N.V. Duy & N.H. Xia , sp. nov. ]. — Typus: China, Hainan, How 72740 (holo-, of M. albosericea , 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 Rhodoleia championii Hook. , Castanopsis chinensis (Spreng) Hance , Manglietia chevalieri Dandy , Paramichelia baillonii 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 đồng [magnolia of Lâm đồng]. ETYMOLOGY. — The specific epithet refers to Lâm đồng Province. DESCRIPTION FIG. 1. — Lectotype of Magnolia champacifolia J. E. Dandy ex F. Gagnepain , sp. nov. (P00203965). FIG. 2. — Magnolia lamdongensis T.V. Tien, N.V. Duy & N.H. Xia , sp. nov. : A , leaf blade and venation detail; B , petiole with stipular scar; C , tip of a flowering twig; D , terminal flower with bract; E , terminal flower without bracts; F , anthetical flower; G , spathe; H , outer tepal; I , middle tepal; J , inner tepal; K , floral receptacle and gynoecium; L , fruit aggregate & fruit with seeds; M , 1 upper stamen (left) & 3 lower stamens (right). N. V. Duy & V. T. Tran 982 (holo-, VTN).Drawn by Tran Van Tien. Scale bars: A, B, M, 1.5 cm; E, 1 cm; G, L, 0.8 cm; H, 0.5 cm; I, J, 0.25 cm; K, 1.2 cm. FIG. 3. — Magnolia lamdongensis V.T. Tran, N.V. Duy & N.H. Xia , sp. nov. : A , habit; B , bark; C , old twigs; D , E , young twigs with terminal bud; F , petiole with stipular scar; G , leaf blades (adaxial and abaxial sides); H , terminal flower with bracts; I , terminal flower without bract; J , flowering twig; K , androecium and gynoecium at the anthesis (top view); L , spathe; M , tepals (right: outer tepal, middle: middle tepal and left: inner tepal); N , stamens (ventral side); O , stamen (dorsal side); P , receptacle and gynoecium; Q , fruit aggregate; R , fruit with seeds. Photos by Nong Van Duy & Tran Van Tien from the type locality. TABLE 1. — Morphological comparison between Magnolia albosericea Chun & Tsoong , M. champacifolia J. E. Dandy ex F. Gagnepain , sp. nov. , and a new taxon from Vietnam, M. lamdongensis V.T.Tran, N.V.Duy & N.H.Xia , sp. nov.

M. lamdongensis V.T.Tran ,	M. champacifolia J. E. Dandy
Characters	N.V.Duy & N.H.Xia, sp. nov.	M. albosericea	ex F. Gagnepain, sp. nov.
Leaves	narrowly ovate, glabrous, midvein	oblong-elliptical, abaxially white villous, lanceolate, abaxially villous, midvein
glabrous, apex acuminate ca. 2 cm,	midvein sparsely long sericeous, apex densely villous, apex acuminate
short acuminate,
Petiole	c. 3 cm long, densely papillate when	c. 3.5 cm long, glabrous	c. 4.5 cm long, densely villous when
young	young
Peduncle	c . 2 cm long, densely papillate	c . 3 cm long, densely sericeous	c . 2.5 cm long, densely villous
Spathe	densely papillate	densely papillate	densely villous
Tepals	outer whorl c. 1.5 cm long, glabrous;	outer whorl c. 4.6 cm long, abaxially	outer whorl c. 4 cm long, abaxially
middle whorl glabrous	densely papillate and white sericeous densely villous; middle whorl abaxially
near base; middle whorl abaxially	densely villous
white sericeous near base
Gynoecium	glabrous	densely papillate	densely papillate

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; 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 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 . REMARKS 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 differs 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 papillate when young, gynoecium glabrous.