Otoba (Candolle) Karsten (1882: 578)

Jaramillo-Vivanco, Tatiana S. & Balslev, Henrik, 2020, Revision of Otoba (Myristicaceae), Phytotaxa 441 (2), pp. 143-175 : 152

Otoba (Candolle) Karsten (1882: 578) .

Myristica sect. Otoba Candolle (1855: 30) .

Dialyanthera Warburg (1895: 83) .

Type:— Myristica otoba Willdenow ( Fig. 1 )

Homotypic synonyms: Dialyanthera otoba (Willdenow) Warburg ; Otoba novogranatensis Moldenke.

Dioecious trees. Branchlets terete or angular, glabrescent to glabrous or pulverulent. Hairs 2-branched, branches uneven, sessile to 1.5 mm long, usually of two sizes, mainly on the lamina; hyaline crystals often present throughout. Leaves with canaliculate, sometimes with winged petiole; lamina pubescent or glabrescent, entire, membranous or papery to leathery; primary vein raised below; secondary veins irregularly or not anastomosing near margin; tertiary veins inconspicuous; intersecondary veins sometimes present. Inflorescences axillary to foliage leaves or on defoliated nodes, with 1–3(–5) partial inflorescences; each partial inflorescence spicate with sessile umbelliform parts, usually pubescent; bracts ovate, deltoid or reniform, usually inconspicuous when present, caducous; bracteoles absent or rarely present. Perianth 3(–4)-lobed. Staminate flowers with a small perianth, somewhat fleshy, inner perianth surface glabrous, smooth or spongy; stamens 3; filaments fused to a column, occasionally distally divergent, or free almost to the base; anthers longitudinally reniform or globose, free and divergent (fused when immature), or fused at the base; connective inconspicuous. Pistillate flowers usually larger, fleshier or stouter than staminate ones; gynoecium grooved at base; ovary glabrous or pubescent, bottle-shaped, ellipsoidal, obconical, or globose and sometimes stalked; stigma sessile to subsessile, bilobed, elongate. Fruit globose to ellipsoidal, 2-valved, rarely carinate; pericarp usually woody, rugose to striate or smooth; aril white to yellow (-orange), usually thin, laciniate for 1/2 or more of its length; seed ellipsoidal or globose, red-brown.

Figures

FIGURE 1. Overview of morphological characters in Otoba. A–B. Fertile shoots. A. Staminate inflorescence of O. gordoniifolia. B. Infructescence of O. cyclobasis.Scale bars: 5 cm.C. Schematic inflorescence, partial inflorescences spicate with sessile umbelliform parts. D–G.Androecia. D. Otoba parvifolia. E. Otoba novogranatensis. F. Otoba gordoniifolia. G. Otoba cyclobasis, flower with tepal removed showing the inner spongy surface and swollen extrastaminal disc surrounding the base of the filament column. H–J. Gynoecia. H. Otoba gordoniifolia. I. Otoba parvifolia. J. Otoba cyclobasis. Scale bars: 1 mm. K–L. Fruits. K. Otoba novogranatensis. L. Otoba parvifolia, presence of lateral prickle. Scale bars: 1 cm. M. 2-branched hair with uneven branches, short-stalked, 0.1–1.5 mm long. Illustration by: Tatiana S. Jaramillo. Voucher specimens:A, F Holm-Nielsen et al. 24457 (AAU), B, Tirado et al. 453 (QCNE), D, Palacios 1694 (AAU), E. Hansen et al. 7904 (AAU), G, Méndez et al. 156 (QCNE), H, Van den Werff et al. 13369 (QCNE), I. Luteyn & Balslev 10224 (AAU), J. Méndez et al. 62 (F), K, Øllgaard et al. 98754 (AAU), L, Luteyn & Balslev 10118 (AAU).