Anisophyllea sabahensis Li Bing Zhang, Xin Chen & H.He, 2015

Chen, Xin, He, Hai & Zhang, Li-Bing, 2015, A monograph of the Anisophylleaceae (Cucurbitales) with description of 18 new species of Anisophyllea, Phytotaxa 229 (1), pp. 448-450 : 448-450

60. Anisophyllea sabahensis Li Bing Zhang, Xin Chen & H.He , sp. nov. ( Figure 118 )

Type:— MALAYSIA. Sabah: Ranau, Mohd. Kg. Miruru, Gan logging area, 29 May 1979, Aban & Petrus SAN 90077 (holotype KH2008 /00218112!, isotype SAN-057734!) .

Diagnosis:— Anisophyllea sabahensis is most similar to A. sarawakensis in having petioles 3–6 mm long, pedicels tomentose, and styles 0.6–1.0 mm long, but the former has buds densely pubescent, bracts tomentose, styles 0.8–1.0 mm long, and leaves dark brown when dry; in contrast, the latter has buds glabrous, bracts glabrous, styles ca. 0.6 mm long, and leaves yellowish green when dry.

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CHEN ET AL.

Trees to 30 m tall, 22 cm in diam.; bark smooth, brown, inner bark brownish, sap woods yellow; young branches sparsely pubescent with brownish hairs ca. 0.16 mm long, glabrescent when mature; buds densely pubescent. Leaves monomorphic (?), internodes 1.5–3.5 cm; leaves petiolate, petiole 3–6 mm long, 1.2–2.0 mm in diam., sparsely pubescent or glabrous; leaf blade elliptical or ovate-elliptical, 9–16 cm long, 4.0– 6.5 cm wide, bases slightly oblique, acute, rarely obtuse, apex acute or acuminate, margin often slightly revolute, coriaceous, glabrous and dark brown when dry; main longitudinal veins 5, springing from blade base, middle 3 veins (midrib and its adjacent lateral veins) bold, outermost two veins rather fine and 0.5–2.0 mm distant from blade margins, raised on both surfaces; transverse veins irregular; veinlets reticulate, tessellate and slightly prominent on both surfaces. Inflorescence a supra-axillary raceme or panicle, solitary or in 2–4 serials, simple or rarely branched at base, with both female and male flowers on same inflorescence; rachis 5–7 cm long, 0.8 mm in diam., sparsely tomentose, with unevenly fascicled flowers (rather densely tomentose at base of floral fascicles with matted rusty hairs ca. 0.08 mm long), floral fascicles 1–4 mm distant; bracts deltoid, at base of fascicles and flowers, ca. 0.6 mm long, 0.3 mm wide, tomentose, margins ciliate; flower buds globose, densely tomentose with matted hairs. flowers unisexual, 4-merous; female flowers sessile; receptacle cylindric and ±quadrangular, ca. 0.6 mm long, 1.1 mm in diam., densely tomentose; sepals deltoid, 0.6–0.7 mm long, 0.8–1.0 mm wide at base, farinose on both surfaces and also obvious on margins; petals ca. 0.2 mm long, 0.16 mm wide, or petals absent; stamens 8, equal in length, filament short, 0.03–0.06 mm long, anthers ca. 0.16 mm long; disk between stamens bulged, ca. 0.16 mm high; styles 4, free, exserted, 0.8–1.0 mm long, base conical, distally attenuate, 0.2–0.3 mm in diam., densely pubescent with yellowish brown hairs ca. 0.04 mm long; male flowers pedicelled, pedicel 0.6–1.2 mm long, 0.25–0.30 mm in diam., densely tomentose; sepals, petals and disk as female flowers; stamens 8, equal in length, 0.4–0.6 mm long, filament thickened and compressed at base, base ca. 0.16 mm wide, farinose, anther ca. 0.25mm long; pistil rudimentary, styles 4, free, subulate, ca. 0.25 mm long, pubescent. Fruit a drupe, broadly ellipsoid, 4.0– 5.5 cm long, 2.5–3.5 cm in diam., blunt at both ends, greenish (immature?).

Flowering and fruiting: —March–September.

Habitat and distribution: —In mixed forests; 900–1200 m. Malaysia (Sabah, Sarawak) ( Figure 119 ).

Vernacular names: —Iben: Medang teja.

Taxonomic notes: — Anisophyllea sabahensis is also similar to A. corneri , from which it can be differed by its shorter petioles, its tomentose pedicels of male flowers, its longer styles in female flowers, and its fruits without purple stripes on surface. It is also close to another new species described hereafter, A. sarawakensis , from which it is distinguished by pubescent buds, tomentose bracts, longer styles, and darker brown dried leaves.

MONOGRAPH OF ANISOPHYLLEACEAE

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The epithet is from the name of one of the states of Malaysia in the Island Borneo , Sabah, where the type specimens were collected .

Additional specimens examined: — MALAYSIA. Sabah: Labuk Sugut, Sungai Tinumbukan, 9 Jul. 1983, Aban Gibot SAN 90494 ( SAN); Nabawan, Syarikat Undan Sdn Bhd Logging Area KM18 Jalan Nabawan / Pandewan , 24 March 1990, Sumbing J SAN 128555 ( SAN); Ranau, Ulu Sungai Lakimut, 26 July 1985, Amin et al SAN 110574 ( K, L, SAN); Ranau, Ulu Tongod, 06 April 1983, Amin & Soinin 95282 ( K, L, SAN) . Sarawak: Baram, G . Mulu, path from Sg. Melinau Paku, 1130 m, 29 June 1961, J. A. R . Anderson 4576 ( L); Gunong Mulu National Park, 4 th Division , 30 September 1976, Bernard Lee S . 38089 ( K, L, MO).

Figures

FIGURE 118. Anisophyllea sabahensis Li Bing Zhang, Xin Chen & H.He. —A, B. Flowering branches (Aban &Petrus SAN 90077; isotype, SAN-057734). —C. Female flower. —D. Male flower. —E. Petal. —F. Stamen of female flower. —G. Stamen of male flower. —H. Styles and disk of male flower (Drawn by Fang Cui).

FIGURE 119. Geographical distribution of Anisophyllea sabahensis Li Bing Zhang, Xin Chen & H.He.