Large trees to small trees. Buttresses present, or absent; tall, or short. Spines absent. Stilt roots absent. Bark brown, black; not peeling in strips. Slash orange, red. Vertical stripes in the inner bark or wood absent. Odor absent. Exudate absent. Terminal buds not enclosed by leaves.
Complex hairs absent. Stinging hairs absent. Mature twig indumentum absent.
Leaves spiral; not scale-like; compound; pinnate, or bipinnate, or with two leaflets; without a terminal leaflet; leaflets opposite; all of the same type; not modified into spines; coriaceous; gland-dotted; very asymmetric at the base, or symmetric at the base; not dissected; smooth margined. Epidermis not waxy. Venation pinnate. Secondary veins open; prominent, or not prominent, but visible. Smallest veins prominent, or not prominent, but visible; net like. Intramarginal vein absent. Stalk of blade less than a quarter the length of the blade; not winged; attached to base of leaf blade; swollen; swollen at one end. Stipules present (small); free from one another; laterally placed; not encircling the twig; scale-like; not fringed; small; not persistent. Domatia absent. Basal glands absent. Hairs on mature leaf absent.
Inflorescences present; terminal, or axillary; on an unbranched axis, or on a branched axis; specialized inflorescence units absent; numerous and persistent inflorescence bracts absent. Flowers bisexual; stalked; with the parts barely visible to the eye to about 0.5 cm long or across; round; with male or female parts raised on a column, or not raised on a column; with the female parts of the flower raised on a stalk. Hypanthium present, or absent. Disk present (S. schmutzii only), or absent; the stamens outside the disk. Perianth present; with distinct calyx and corolla whorls. Sepals 5; partially joined; not persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present; 5; all joined (base); not fleshy; deciduous; not stalked; entire. Stamens 10; filaments present; free of each other; joined to the perianth (base); of different sizes (alternating short and long); diplostemonous. Anthers 2 loculed; attached along the side; not awned; dehiscing by long slits. Ovary superior. Carpels solitary; 1. Locules 1. Styles solitary. Stigmas 1 lobed; not distinctive. Fruit legume-like; non-fleshy; not multiple; splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 2-3 per fruit; about 1 cm long to much more than 1 cm long; wingless; uniform in cross-section; aril absent; non-endospermic.
Sometimes buttressed trees; flowers small; fruits woody, 15-20 cm long and inflated below where the seeds are found. Taxon images: sympet.gif
Cite this publication as: Jarvie, J.K. and
Ermayanti (1996 onwards). `Tree Genera of Borneo - Descriptions and
Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993) should also be cited.