A revision of Cinnadenia Kosterm. (Lauraceae) Author De Kok, Rogier P. J. Author Sengun, Seda text Adansonia 2020 2020-03-09 42 4 105 112 journal article 21755 10.5252/adansonia2020v42a4 4b767a37-3a18-48a2-8007-d1ae9e507fbd 1639-4798 3877364 Genus Cinnadenia Kosterm. Adansonia, sér. 2 , 13: 223 (1973) ; Grierson & Long, Flora of Bhutan 1 (2): 39 (1984); Kochummen, Tree Flora of Malesia 4: 123 (1989); Rohwer, Families and Genera of Vascular Plants 2: 389 (1993) ; Van der Werff, Blumea 46: 135 (2001). — Type species: Dodecadenia paniculata Hook.f. (1886) (synonym of Cinnadenia paniculata (Hook.f.) Kosterm.) Litsea section Octolitsea, H.Liu, Bulletin de la Société botanique de France 80: 568 (1933). — Type species: Litsea liyuyingii H.Liu (synonym of Cinnadenia liyuyingii (H.Liu) de Kok & Sengun , comb. nov.). DISTRIBUTION. — Three species, one in North India and Bhutan, one in South China and North Vietnam and one in Peninsular Malaysia (see Fig. 1). DESCRIPTION Trees 3-30 m tall. Terminal leaf buds not perulate. Leaves alternate, venation pinnate, domatia absent. Inflorescence umbellate or a panicle or with 3 or 4-5 terminal flowers, axillary, rarely terminal, involucral bracts absent or present. Flowers unisexual, dimerous or trimerous; perianth lobes 4 or 6, equal, persistent, partly truncate or deciduous in fruit; tube short, funnel-shaped, enlarged and indurate in fruit. Male flowers, stamens 8-12, 18-26 or 32, 3 rd row with a pair of stalked or sessile glands on the filaments; anthers 4-celled, all introrse. Female flowers, ovary sessile, at the bottom of FIG. 1. — Distribution of the species of Cinnadenia Kosterm. :, Cinnadenia paniculata (Hook. f.) Kosterm.;, Cinnadenia liyuyingii (H.Liu) de Kok & Sengun , comb. nov. ;, Cinnadenia malayana Kosterm. perianth tube; style slender; stigma discoid or obscurely 3-lobed. Fruit a drupe, seated on a cup-shaped perianth tube (cupule), margin entire. KEY TO THE SPECIES OF CINNADENIA KOSTERM. 1. Leaves lanceolate; apex acuminate; upper surface smooth (hand lens), secondary venation hardly visible. Inflorescence with an apical whorl of 2-3 flowers; flowers with 4 perianth lobes .............. 2. C. malayana Kosterm. — Leaves elliptic to lanceolate, sub-obovate or narrowly ovate; apex acute to indistinctly acuminate to obtuse; upper surface pitted (hand lens), secondary venation clearly visible. Inflorescence with apical whorl of 4-5 flowers or umbellate; flowers with 6 perianth lobes ................................................................................................. 2 2. Twigs sparsely hairy to glabrous when young; terminal leaf bud 6.4-7.4 mm long, apex acuminate, glabrous to velutinous; flowers with 26 or 32 stamens .................. 1. C. liyuyingii (H.Liu) de Kok & Sengun , comb. nov. — Twigs velutinous when young, glabrescent; terminal leaf bud 2.3-2.5 mm long, apex acute to indistinctly acuminate, velutinous; flowers with 9-12 stamens ............................................ 3. C. paniculata (Hook. f.) Kosterm.