10. Homalium phanerophlebium How & Ko, Acta Bot. Sin. 8(1): 44. 1959.
显脉天料木 xian mai tian liao mu
Homalium phanerophlebium var. obovatifolium S. S. Lai.
Trees, 8-10 m tall; bark gray to grayish brown; branchlets terete, initially pubescent with short curved (in dry material) hairs, soon glabrescent, markedly lenticellate. Stipules not seen, scars present; petiole 8-15 mm, pubescent with short curved hairs or practically glabrous; leaf blade drying blackish brown, elliptic-oblong or ovate-oblong, (3-)7-14 × (2-)3-5.5 cm, 2-3.5 × as long as wide, both surfaces glabrous, midvein and lateral veins slightly raised abaxially, adaxially flat, lateral veins 5-7 pairs, base acute, obtuse, or rounded, suboblique, margin remotely serrulate, appearing nearly entire, slightly revolute in dried state, apex usually obtuse, contracting gradually or abruptly to a narrow acumen 10-30 mm, extreme tip generally blunt, less often leaf apex acute. Inflorescence terminal or axillary, racemose or paniculate, 7-15 cm; rachis pubescent, hairs semispreading, curved, short; bracts ca. 1.5 mm, very narrow, glabrous or pubescent. Pedicels 1.5-2.5 mm, longer in fruit, articulate near middle, pubescent, below articulation hairs semispreading, curved, short, above articulation generally straighter and more appressed. Flowers numerous, inserted along rachis singly or in fascicles of 2-4, fragrant; (5 or)6 or 7(or 8)-merous, at anthesis 3-4 mm, to 6 mm in fruit (excluding styles). Calyx tube 1-1.5 mm at anthesis, sparsely pubescent with closely appressed hairs 0.1-0.2 mm, initially smooth, later becoming longitudinally ridged; sepals linear-oblong to narrowly obovate, ca. 2 × 0.4 mm at anthesis, both surfaces glabrous or with a few closely appressed hairs, margin ciliate, hairs straight, often appressed, 0.1-0.2 mm; sepal apex acute or rounded. Petals oblanceolate, slightly longer and wider than sepals, both surfaces glabrous except for sparse spreading hairs near base, margin ciliate, hairs spreading, ca. 0.3 mm, longer than hairs on sepal margin, shorter than 1/2 width of petal; petal apex obtuse, apiculate. Stamen filaments ca. 3.5 mm, glabrous except for long, spreading hairs toward base. Disk glands sparsely pubescent, hairs spreading, long. Free part of ovary pubescent, hairs spreading, long, similar to those on disk glands and petal margins; styles 2 or 3(or 4), free, 3-4 mm, glabrous or with a few spreading hairs near base; placentas 2 or 3(or 4), each with 3 or 4 ovules. Capsule excluding perianth segments 4-5 mm. Fl. Oct-Nov, fr. Dec-Feb of following year.
Mixed woods and thickets. Guangdong, Hainan [Vietnam].
The specimen S. K. Lau 5436 (A), from Hainan, is not referable to Homalium phanerophlebium ; see inadequately known "species C" below.