Ochanostachys

Family Olacaceae. Order Santalales.

Large trees to small trees. Buttresses present, or absent; short. Spines absent. Stilt roots absent. Bark yellow, brown; not peeling in strips. Slash yellow, green, orange. Vertical stripes in the inner bark or wood absent. Odor absent. Exudate present; white; spotty; not 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 not waxy. Venation pinnate. Secondary veins open; prominent. 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; swollen; swollen at one end (apex). Stipules absent. Domatia absent. Basal glands absent. Hairs on mature leaf absent.

Inflorescences present; axillary; on an unbranched axis; specialized inflorescence units absent; numerous and persistent inflorescence bracts absent. Flowers bisexual; not stalked; about 0.5 cm long or across; round; with male or female parts not raised on a column. Hypanthium absent. Disk present. Perianth present; with distinct calyx and corolla whorls. Sepals 4-5; partially joined; not persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present; 4-5; all joined (at base); not fleshy; deciduous; not stalked; entire. Stamens 12-15; filaments present; joined (three groups); joined to the perianth; all equal in size; triplostemonous. Anthers 2 loculed; attached by the base; not awned; dehiscing by pores, or dehiscing by short slits. Ovary superior. Carpels joined; 3. Locules 3. Styles solitary. Stigmas 3 lobed; not distinctive. Fruit drupaceous; fleshy (thinly); not multiple; not splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 1 per fruit; about 1 cm long, or much more than 1 cm long; wingless; uniform in cross-section; aril absent; endospermic.

Flowers in axillary branched spikes; bole not straight; bark yellow- ochre with large, thin and adherent scales; secondary veins in 5 prominent pairs. Taxon images: ochnost.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.