Anisophyllea insularis 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

33. Anisophyllea insularis Li Bing Zhang, Xin Chen & H.He , sp. nov. ( Figure 64 )

Type:— MALAYSIA. Sabah: Beaufort , 18 October 1962, J. K . Lajangah 32263 (holotype L-0520548!, isotype SAN!) .

Diagnosis:— Anisophyllea insularis is most similar to A. glandibeccariana in their eglandular flowers, but the former has flowers bisexual, sessile, 1.1–1.3(–2) mm long; styles glabrous; young branches and buds pannose; in contrast, the latter has flowers polygamous, bisexual flowers sessile, 2.2–3.0 mm, male flowers to 1.6 mm long, with pedicels to 1 mm long; styles of bisexual flowers pubescent; young branches and buds pubescent.

Trees to 21 m tall, 24 cm in diam.; young branches pannose with brownish appressed hairs ca. 0.25 mm long, and also with transparent protuberant glands; buds densely pannose as young branches. Leaves dimorphic, internodes between similar types of leaves 1.0– 2.5 cm, between two adjacent different types of leaves 2–8 mm; small leaves caducous, only leaving very small scars; large leaves petiolate, petiole to 6 mm long, 1.2 mm in diam., furrowed adaxially, glandular; leaf blade elliptic or elliptical-lanceolate, 6.5–10.0 cm long, 2.5–3.8 cm wide, base slightly oblique, acute or obtuse, apex acute or acuminate, margins often slightly revolute, thinly coriaceous, glabrous on both surfaces, glandular with transparent protuberant glands (0.12–) 0.2–0.3 mm in diam., 0.3–1.4 mm distant; main longitudinal veins 5, springing from blade base, midrib straight and bold, impressed adaxially and raised abaxially, lateral main veins rather fine and close to blade margins, outermost two veins nearly confluent with blade margins, slightly prominent on both surfaces; transverse veins irregular, ones from midrib curved towards blade apex, as conspicuous as lateral main veins and resulting in ±pinnate-like venation; veinlets reticulate, slightly prominent on both surfaces. Inflorescence an axillary or supra-axillary spike, in serials, usually branched at base; rachis 2.5–4.5 cm long, ca. 0.4 mm in diam., pannose with brownish hairs ca. 0.1 mm long (more densely covered at base of flowers), rather remotely with flowers (floral internodes 0.6–2.0 mm distant); bracts lanceolate, 0.5–0.8 mm long, 0.15–0.50 mm wide, glabrous adaxially and pannose abaxially, margins ciliate; floral buds obovate, ±quadrangular, pannose outside; flowers bisexual, 4-merous, 1.1–1.3(–2) mm long, sessile, yellowish; receptacle cylindric, ca. 1 mm long, 1.3 mm in diam., sparsely pannose; sepals deltoid, 1.1–1.3 mm long, apex acute, glabrous adaxially and pannose abaxially; petals obovate, ca. 0.5 mm long, 0.5 mm wide at apex, 0.16 mm wide at base,

MONOGRAPH OF ANISOPHYLLEACEAE

Phytotaxa 229 (1) © 2015 Magnolia Press • 89 90 • Phytotaxa 229 (1) © 2015 Magnolia Press

CHEN ET AL.

slightly emarginate, margins incurved; stamens 8, episepalous 4 fertile, ca. 0.6 mm long, filaments fleshy, linearly oblong, ca. 0.5 mm long, 0.1 mm wide at apex, 0.2 mm wide at base, glabrous, anthers sub-globose, ca. 0.22 mm long, epipetalous 4 sterile, ca. 0.3 mm long; disk 8-lobed, crenulate; styles 4, free, ca. 0.54 mm long, base conical ca. 0.25 mm in diam., distally attenuate and recurved, glabrous. Fruits unknown.

Flowering and fruiting: —Flowering in October; fruiting time unknown.

Habitat and distribution: — In lowland forests; below 250 m. Malaysia (Johor, Sabah, Terengganu) ( Figure 65 ) .

Taxonomic notes: — Anisophyllea insularis shows close affinity with A. glandibeccariana , from which it differs in its smaller bisexual flowers, its glabrous styles and its pannose young branches and buds. It also resembles A. griffithii in indumentum on young branches and buds and in inflorescences and flower structures. However, the former can easily be distinguished from the latter by its glandular hairs on young branches, petioles, and most obviously both surfaces of leaf blades. In addition, the former has relatively longer petiole, shorter rachis of inflorescences, and often smaller flowers.

The epithet insularis refers the Borneo island where the type specimen was collected.

Additional specimens examined: — MALAYSIA. Johor: Rengam F. R ., Gunong Lambak Microwave Station, Virgin Jungle Reserve , 19 September 1970, T . Suppiah FRI 17760 ( L) . Sabah: Sandakan, Bintang Baru logging area Mile 55, ca. 30 m, 22 September 1975, Tarmiji Arsid 81534 ( SAN); Telupid, Keramuak, 15 June 1988, Miskon Simin 122667 ( SAN) . Terengganu: lu Besut, Bt. Jebak Puyoh, Ualt. 220 m, 04 May 1968, P. F . Cockburn FRI 8332 ( L) .

Figures

FIGURE 64. Anisophyllea insularis Li Bing Zhang, Xin Chen & H.He (J. K. Lajangah 32263; holotype L-0520548). —A. Flowering branch. —B. Flower. —C. Petal. —D. Episepalous stamen. —E. Epipetalous stamen. —F. Styles and disk (B–F drawn by Fang Cui).

FIGURE 65. Geographical distribution of Anisophyllea insularis Li Bing Zhang, Xin Chen & H.He.