狭叶红光树 xia ye hong guang shu

Trees to 20 m tall, 10-35 cm d.b.h.; juvenile branches with dense grayish brown scurfy or stellate pubescence, hairs ca. 0.1 mm, glabrescent. Petiole rather slender, 8-20 mm, with dense appressed rusty or tawny pubescence, glabrescent; leaf blade oblong-lanceolate or linear-lanceolate, 8-30 × 2-8.5 cm, papery, abaxially pale or glaucous, early glabrescent from minute 0.1-0.3 mm hairs, adaxially glossy, glabrous, base cuneate to rounded, apex acuminate or long acuminate; midvein and lateral veins with granular or powdery stellate pubescence, lateral veins 20-25 pairs, midvein prominent abaxially and sunken adaxially, ultimate venation very fine, prominent on both surfaces. Male inflorescences up to 5 mm, pedunculate, simple. Male flowers 3-15; pedicel 5-10 mm; bracteole at or above middle; perianth in bud globose, ca. 4 mm in diam., lobes 3; staminal disk flattish; anthers 8-16. Female inflorescences with 2 or 3 flowers. Female flowers: pedicel 3-6(-10) mm; perianth in bud ovoid-oblong, ca. 6 mm; ovary ovoid, with dense pubescence, hairs 0.5-1 mm; style short; stigma deeply 2-lobed and each lobe shallowly many lobulate. Fruiting pedicel short, 3-8(-12) mm. Fruits 1-3 per infructescence, ellipsoid, 2-3.5 × 1.5-2 cm, base rounded, apex acute or rounded; perianth persistent, with dense pubescence of shaggy hairs 1-2 mm, partly glabrescent; pericarp ca. 1.5 mm thick. Seeds ellipsoid, 2-2.2 × 1.4-1.6 cm, base rounded, apex oblique, slightly pointed; aril thin, completely enclosing seeds or only at apex slightly open. Fl. Oct, fr. Apr-May.

Mountain slopes, ravines; 500-1200 m. Yunnan (Mengla, Ruili) [Bangladesh, India (including Andaman Islands), Myanmar, Thailand, Vietnam].

In FRPS (30(2): 187. 1979), this species was misidentified as Knema cinerea (Poiret) Warburg var. glauca (Blume) Y. H. Li (K. glauca (Blume) Petermann; Myristica glauca Blume). True K. cinerea var. glauca is distributed in Indonesia, Malaysia, and Peninsular Thailand.

Knema lenta resembles K. andamanica (Warburg) W. J. de Wilde (K. cinerea var. andamanica (Warburg) J. Sinclair; K. glauca var. andamanica Warburg), from SE India (Andaman and Nicobar Islands). Knema andamanica differs in having obovoid male flower buds and fruit with hairs 1 mm or less in length.