Saurauia

Family Actinidiaceae. Order Theales.

Small trees to shrubs. Buttresses absent. Spines absent. Stilt roots absent. Bark red, gray, brown; not peeling in strips. Exudate absent. Terminal buds not enclosed by leaves.

Complex hairs present, or absent; star-like, or awl-like. Stinging hairs absent. Mature twig indumentum present, or absent; dense, or sparse.

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, or with small to large teeth on margin. Epidermis not waxy. Venation pinnate. Secondary veins open; prominent, or not prominent, but visible. Smallest veins prominent, or not prominent, but visible; ladder like. Intramarginal vein absent. Stalk of blade less than a quarter the length of the blade to a quarter to one half the length of the blade; not winged; attached to base of leaf blade; not swollen. Stipules absent. Domatia absent. Basal glands absent. Hairs on mature leaf present; dense, or sparse.

Inflorescences present, or represented by solitary flowers only; axillary, or on the trunk or branches; the flowers from a single point on the stem, or on a branched axis; specialized inflorescence units present, or absent; specialized inflorescence units heads, or corymbs; numerous and persistent inflorescence bracts present at the bottom of the inflorescence, or absent. Flowers bisexual; stalked; about 0.5 cm long or across, or to about 3 cm long or across; round; with male or female parts not raised on a column. Hypanthium absent. Disk absent. Perianth present; with distinct calyx and corolla whorls. Sepals 5; free; persistent in fruit; not growing any further after flowering. Epicalyx present (Saurauia calyptrata), or absent. Petals present; 5; all joined (basally); not fleshy; deciduous; not stalked; lobed, or entire. Stamens 100 (many); filaments present; free of each other; free of the perianth, or joined to the perianth; all equal in size, or of different sizes; polystemonous. Anthers 2 loculed; attached along the side; not awned; dehiscing by short slits. Ovary superior. Carpels joined; (2-)3-6(-7). Locules (2-)3-6(-7). Styles solitary. Stigmas (2-)3-6(-7) lobed; not distinctive. Fruit berry-like; fleshy; not multiple; not splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 100 per fruit (many); barely visible; wingless; uniform in cross-section; aril absent; endospermic.

Often with scaly hairs on twigs; flowers long pedicelled and sometimes cauliflorous; petals white; stamens numerous; berries with numerous seeds in a slime like gel. Taxon images: gensaur.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.