Zygogynum whitmoreanum Vink, 2014

Vink, W., 2014, The Winteraceae of the Old World. VII. Zygogynum in the Solomon Islands (incl. Bougainville), Blumea 59 (2), pp. 155-162 : 161

Zygogynum whitmoreanum Vink , sp. nov. — Fig. 3

Zygogyno haplopus carpellis numerosis (10–13) et inflorescentiis partialibus 6–8-floribus differt. — Typus: Farodo BSIP 12034 ( L) .

Etymology. This species is named after Dr. Timothy Charles Whitmore (1935–2002), from 1962 till 1964 Forest Botanist at Honiara; see Flora Malesiana I, 5, 1958, CCCXXXII, and I, 8, 1974, CV; Turner 2002; Grubb et al. 2003.

Treelet 6 m high with crooked bole 10 cm diam; bark dark brown, smooth; wood white, soft. Branchlets rather slender, brown. Leaves scattered along branchlets; petiole 15–25 mm long, rounded but distally shallowly grooved above, brown; blade oblanceolate, 15–17 × 3.5– 4 cm, chartaceous, in sicco light brown below; apex (narrowly) rounded (or minutely retuse), base unequal, narrowly acute; midrib impressed above, rounded below; secondary nerves at 65–75° with midrib, arcingly joined at some distance from the margin, distinct on either side. On lower leaf surface stomata white, solitary, dense, also present over secondary nerves; oil cells many, dark to hardly visible. Inflorescences with 9 partial inflorescences, these 6–8.5 cm long, with rather slender axes but not pendulous, 6–8-flowered; empty bracts below inflorescence absent; pedicels 8–17 mm long, slender. Flowers strongly scented. Calyx subrotate, 1 mm long, thin, smooth, margin with 2 small tips. Petals 14, white, outer ones obovate and broadly rounded, 7 × 3.5 mm, next higher ones 5.5–6.5 × 2–2.3 mm, inner ones narrowly obovate to oblanceolate and rounded, adaxially with apical thickenings, 4.3–5 × 1–1.5 mm. Stamens 23–27, 3–4 mm long, except for thecae finely papillate, thecae lateral, sterile apex lingulate to narrowly triangular, 30–50 % of length of stamen. Carpels 10–13, free, 2.3 × 1 mm; stigma short (about half as long as carpel width), variably steep on adaxial side of carpel apex; ovules 9–13. Fruits not seen.

Distribution — Only known from the type: Duidui, SW Guadalcanal, Solomon Islands.

Habitat & Ecology — Primary forest on hillside, 315 m altitude. Flowering October.

Vernacular name — Kwara’ae language:Aisigwarigwari (the same name as for Z. haplopus ).

Figures

Fig. 3 Type specimen of Zygogynum whitmoreanum Vink (name corrected).