Dipterocarpaceae Blume

Family

Angiosperms > Malvales

Characteristics

Trees, evergreen or semievergreen, rarely deciduous in dry season. Xylem with aromatic resin in intercellular resin canals. Branchlets with stipular scars, sometimes annular. Leaves simple, alternate; stipules persistent or caducous, large or small; leaf blade with lateral veins pinnate, margin entire or sinuate-crenate. Inflorescences few-or many-flowered, terminal or axillary racemes or panicles; flowers usually sweetly scented; bracts usually fugacious and minute, rarely persistent and large. Inflorescences, calyces, petals, ovary, and other parts usually with stellate, squamate, fascicled or free-standing hairs. Flowers bisexual, actinomorphic, contorted. Calyx lobes 5, free or united at base, imbricate in bud if not united. Petals 5, adnate or connate at base. Stamens (10-)15 to many, free from or connate to petals; filaments usually dilated at base; anthers 2-celled, with 2 pollen sacs per cell (Chinese species); connective appendages aristate, filiform or stout. Ovary superior, rarely semi-inferior, slightly immersed in torus, usually 3-loculed, each locule 2-, rarely many ovuled; ovules pendulous, lateral or anatropous. Fruit usually nutlike, sometimes capsular and 3-valved, 1(to many)-seeded, with persistent, variously accrescent calyx of which 2 or more lobes are usually developed into lorate wings. Seed exalbuminous; cotyledons fleshy, equal or unequal, applanate or ± folded or cerebriform, entire or laciniate; radicle directed toward hilum, usually included between cotyledons.
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Small to large usually resinous mostly buttressed trees; indumentum various but often of fasciculate hairs, frequently glandular. Leaves alternate, simple, entire or sinuate at margin; stipules paired, large or small, persistent or soon falling. Flowers ?, regular, in axillary or terminal branched panicles, racemose or less often cymose; bracts and bracteoles paired, persistent or soon falling. Calyx persistent; lobes imbricate or valvate, free or fused at the base; 2–5 lobes usually accrescent into very distinct wings in fruiting state. Corolla-lobes 5, contorted, connate at base or free. Stamens 5 to over 100; filaments free or connate; anthers 2-thecous, introrse or laterally dehiscent. Ovary superior or semi-inferior, partly unilocular or (2–)3–5-locular (4 in the sole S. American genus); ovules 2(–4) in each locule, axile or parietal. Fruit indehiscent, usually 1-seeded with woody pericarp, usually with 2–5 persistent wing-like sepals but not accrescent in a few genera
Leaves alternate, entire, penninerved; indumentum often of two kinds, of stellate hairs or rarely of peltáte scales; stipules mostly small and deciduous, sometimes very large and enclosing the young bud, rarely persistent, leaving an annular scar after falling away
Calyx-tube short or well developed, free or adnate to the ovary; lobes 5, imbricate or valvate, mostly greatly enlarged, wing-like, and ascending in fruit and then strongly nervose, rarely small and reflexed or spreading
Stamens rarely definite, hypogynous or subperigynous; filaments short, often dilated at the base; anthers 2-celled, opening lengthwise; connective mucronate or aristate or club-shaped
Leaves alternate, petiolate, entire, penninerved, in African species always with an extra-floral nectary at the base of the midrib on the upper face of the lamina; stipules caducous
Ovary inserted on the broad torus or slightly immersed in it, 3-celled; style subulate or variously thickened, entire or 3-lobed; ovules 2 in each cell
Fruit free from or included in the enlarged calyx-tube, rarely closely adnate to it, indehiscent, usually 1-seeded
Fruit 1-seeded, indehiscent, surrounded by the wings (always 5 in the African species) of the accrescent calyx
Petals 5, much contorted, free or slightly connate at the base, often hairy and inconspicuous
Ovary superior, (1) 3-locular with axile or parietal placentation; carpels (1) 3, 2-ovulate
Seeds without endosperm; cotyledons thick and equal or variously contorted
Petals 5, contorted to the right, free or slightly connate at the base
Flowers hermaphrodite, actinomorphic, fragrant, in axillary panicles
Stamens 5, 10, 15 or numerous (always numerous in African species)
Flowers actinomorphic, bisexual
Trees with resinous wood
Sepals 5, accrescent
Trees or shrubs
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Sexuality hermaphrodite
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Cultivation

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Images

Dipterocarpaceae unspecified picture
Dipterocarpaceae unspecified picture

Distribution

Dipterocarpaceae world distribution map, present in China

Identifiers

LSID urn:lsid:ipni.org:names:77126600-1
WFO ID wfo-7000000197
COL ID 9CP
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Dipterocarpaceae

Lower taxons

Anisoptera Shorea Trillesanthus Vateriopsis Dipterocarpus Pentacme Hopea Stemonoporus Vateria Vatica Marquesia Dryobalanops Monotes Pseudomonotes Neobalanocarpus Parashorea Cotylelobium Upuna