Sterculia rogersii N.E.Br.

Squat star-chestnut (en)

Species

Angiosperms > Malvales > Malvaceae > Sterculia

Characteristics

A small tree up to 6 m high, branching from low down with a characteristic swollen trunk and a very sparse, moderately spreading crown; bark brownish red, peeling off in paper-thin flakes to reveal a yellow to yellowish green, glossy stem mottled with brown, red and even dark purple patches; young branchlets stellate hairy. Leaves simple, petiolate, borne singly or clustered at ends of short side shoots; lamina broadly ovate, 3-6 x 2-5 cm, discolorous, covered with stellate hairs, shallowly and sinuately 3-5-lobed, base cordate, apex obtuse or subacute, conspicuous nerves 5-7; petiole slender, up to 7.5 cm long. Flowers solitary or in small clusters produced both on old wood and young branches. Calyx shallowly campanulate, with 5 sepals tapering to a long point, greenish yellow flushed with pink and with conspicuous deep pink or red streaks and lines; sepals with outer side and tip of inner side stellate hairy, inner side glandular hairy. Corolla wanting. Androgynophore c. 10 mm long, curved, cupular at apex, furnished with hairs; cupule with stamens round its circumference. Fruit star-shaped, consisting of up to 5 free follicles, radiating from a central point, follicles 5-6 cm long, 2 cm wide tapering to a long point, outer surface densely covered with stellate hairs, inner surface sparsely stellate hairy, long irritant hairs present along inside of suture; seeds oblong-ellipsoid, 10-15 x 7 mm, dull blackish.
More
A dumpy tree. The trunk is swollen. It is often 3 m high but can be 8 m high. It usually branches near the base. The trunk is stout and shiny. The main branches are robust and grey. The leaves are alternate. They are on long wand like branches clustered at the ends. They are 2.5-6 cm long and often with 3-5 lobes. The lobes have a sharp point. They leaves are dark green above and greyish-green below. The flowers are separately male and female on the same tree. They are yellow-green streaked with red and 1.5 cm across. The fruit consists of 1-5 stalkless lobes or separate parts.
Leaves borne singly or clustered on the ends of short side-shoots; lamina up to 6 × 5 cm., very broadly cordate-ovate, entire or very shallowly and sinuately 3–5-lobed, apex obtuse or subacute, minutely puberulous above, whitish and tomentellous below, 5–7-nerved at the base; petiole up to 2 cm. long, tomentellous.
Small tree, up to 6 m high. Leaves simple, lamina broadly ovate, shallowly and sinuately 3-5-lobed, base cordate. Fruit of 5 free follicles, outer surface densely stellate hairy. Flowers greenish yellow flushed with pink, marked with pink or red.
Follicles 3–5, up to 7–5 cm. long, oblong-ovoid, spreading, subsessile, apical horn up to 1·3 mm. long, golden-tomentellous outside, pale and tomentellous inside; placentas with very dense acicular hairs.
Flowers in clusters on the short side-shoots, appearing before the leaves; pedicels up to 5 mm. long, tomentellous, articulated near the middle; bracteoles c. 1–5 mm. long, linear, pubescent, caducous.
Small tree up to 5 m. tall with rather slender branches and often branching low down; bark brown and peeling in papery flakes.
Flowers yellowish-green with reddish guide-lines within, very similar in size and structure to those of S. africana.
Seeds numerous, like those of S.africana but only 1–1·3 × 0·7 cm,
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention deciduous
Sexuality -
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 6.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

A tropical plant. It occurs in drier places. It is in hot, low-altitude areas. It is often in rocky places. It can grow in arid places.
Light -
Soil humidity -
Soil texture 5-8
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

The heartwood is eaten in times of food shortage.
Uses animal food food gene source material wood
Edible seeds
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Plants can be grown from seeds.
Mode seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Fruit

Sterculia rogersii fruit picture by Jannie Shelton (cc-by-sa)
Sterculia rogersii fruit picture by Herwig Mees (cc-by-sa)

Distribution

Sterculia rogersii world distribution map, present in Botswana, Mozambique, eSwatini, South Africa, and Zimbabwe

Conservation status

Sterculia rogersii threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:825442-1
WFO ID wfo-0001141109
COL ID 52DKW
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Sterculia rogersii