Swintonia

Family Anacardiaceae. Order Sapindales.

Emergent trees to small trees. Buttresses present, or absent; tall, or short. Spines absent. Stilt roots present, or absent. Bark red, gray, brown; not peeling in strips. Slash yellow, red, gray, brown. Vertical stripes in the inner bark or wood absent. Odor absent. Exudate present; white, or red, or colorless; spotty; blackening on exposure to air. Terminal buds not enclosed by leaves.

Complex hairs absent. Stinging hairs absent. Mature twig indumentum absent.

Leaves spiral; not scale-like; simple; all of the same type; not modified into spines; coriaceous; not gland-dotted; symmetric at the base; not dissected; smooth margined. Epidermis waxy, or not waxy. Venation pinnate. Secondary veins open; prominent. Smallest veins prominent, or not prominent, but visible; net like. Intramarginal vein present. 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 absent. Domatia absent. Basal glands absent. Hairs on mature leaf present, or absent; sparse.

Inflorescences present; terminal, or axillary; on a branched axis; specialized inflorescence units absent; numerous and persistent inflorescence bracts absent. Flowers bisexual, or at least some flowers unisexual; with male and female flowers on the same plant; stalked; 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 male parts of the flower raised on a stalk, or with the female parts of the flower raised on a stalk. Hypanthium absent. Disk present (as 5 gland-like lobes); the stamens inside the disk. Perianth present; with distinct calyx and corolla whorls. Sepals 5; partially joined; not persistent in fruit; not growing any further after flowering, or growing slightly after flowering. Epicalyx absent. Petals present; 5; free; fleshy; persistent (accrescent); not stalked; entire. Stamens 5; filaments present; free of each other; free of the perianth; all equal in size; isomerous; opposite the sepals (when isomerous). 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; distinctive; head shaped. Fruit drupaceous; fleshy; not multiple; not splitting; not enclosed in, or sitting on, fleshy perianth parts; winged (petals), or wingless. Seeds 1 per fruit; less than 5 mm, or about 1 cm long; wingless; uniform in cross-section; aril absent; non-endospermic.

Bark dippled or scaly; leaves often in pseudowhorls, generally glaucous beneath; petals persistent and greatly enlarged in fruit. Taxon images: genswint.gif


Cite this publication as: Jarvie, J.K. and Ermayanti (1996 onwards). `Tree Genera of Borneo - Descriptions and Illustrations' URL http://django.harvard.edu/users/jjarvie/Borneo.htm/.
Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993) should also be cited.