Edit History
Rytigynia orbicularis K. Schum. Robyns [family RUBIACEAE]
Date Updated: 26 July 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora Zambesiaca
Resource Type
Reference Sources
Entry From
FZ, Vol 5, Part 2, (1998) Author: D. Bridson
Names
Rytigynia orbicularis K. Schum. Robyns [family RUBIACEAE], in Bull. Jard. Bot. État 11: 151 (1928). —F. White, F.F.N.R.: 420 (1962). —Verdcourt in Kew Bull. 42: 156 (1987). Type from Angola.
Plectronia orbicularis K. Schum. [family RUBIACEAE], in Warburg, Kunene-Samb.-Exped. Baum: 388 (1903).
Canthium orbiculare K. Schum. Good [family RUBIACEAE], in J. Bot. 64, Suppl. 2: 22 (1926).
Information
Glabrous subshrub or shrub 0.6–1.2 m tall, with rather slender somewhat glaucous much branched stems with reddish-brown eventually somewhat flaking bark.Leaves sometimes folded and curved downward, glaucous or blue-green, 1.2–5 × 0.8–4 cm, ovate to round, or elliptic, mostly shortly acutely acuminate at the apex but sometimes rounded or even slightly emarginate, rounded to usually distinctly cordate at the base, glaucous; petiole 1–5 mm long; stipular sheath c. 1 mm long, with a subulate thickish appendage 1–2.5 mm long.Flowers solitary; peduncle 5–10 mm long; pedicels 5–8 mm long; bracts 2, minute, scarcely 1 mm long, lanceolate.Calyx tube 1–2 mm long, obconic, the limb 0.5–0.75 mm long undulate or shallowly toothed.Corolla apiculate in bud; greenish-white or yellowish, the lobes often a more distinct yellow; tube 4–6 mm long, funnel-shaped, with a ring of deflexed hairs below the throat inside; lobes triangular-lanceolate, 4–5 × 2 mm at the base, including the very short appendages.Stigma exserted about 1 mm; pollen presenter 1.5 mm long, ellipsoid, later subcoroniform, strongly 3-lobed at the apex.Ovary 3-locular.Fruit up to 8 × 10 mm with 1–3 pyrenes; pyrenes c. 8 mm long, deeply lobed in dry state.
Habitat
Woodland and thicket on Kalahari Sand; in Cryptosepalum and Baikiaea plurijuga–Burkea africana woodlands, and Brachystegia bakeriana thicket
Altitude range
c. 1500 m.
1500
1500
Distribution
Zambia S Machili, fl. 20.i.1961, Fanshawe 6152 (K; LISC; NDO).Zambia W Mwinilunga Distr., just east of R. Kasompa, fl. 1.ii.1938, Milne-Redhead 4440 (K).Zambia B Kalabo to Sikongo, 21 km, fr. 14.ii.1952, White 2073 (FHO; K).
Distribution (external)
Angola
Date Updated: 26 July 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora Zambesiaca
Resource Type
Reference Sources
Entry From
FZ, Vol 5, Part 2, (1998) Author: D. Bridson
Names
Rytigynia orbicularis K. Schum. Robyns [family RUBIACEAE], in Bull. Jard. Bot. État 11: 151 (1928). —F. White, F.F.N.R.: 420 (1962). —Verdcourt in Kew Bull. 42: 156 (1987). Type from Angola.
Plectronia orbicularis K. Schum. [family RUBIACEAE], in Warburg, Kunene-Samb.-Exped. Baum: 388 (1903).
Canthium orbiculare K. Schum. Good [family RUBIACEAE], in J. Bot. 64, Suppl. 2: 22 (1926).
Information
Glabrous subshrub or shrub 0.6–1.2 m tall, with rather slender somewhat glaucous much branched stems with reddish-brown eventually somewhat flaking bark.Leaves sometimes folded and curved downward, glaucous or blue-green, 1.2–5 × 0.8–4 cm, ovate to round, or elliptic, mostly shortly acutely acuminate at the apex but sometimes rounded or even slightly emarginate, rounded to usually distinctly cordate at the base, glaucous; petiole 1–5 mm long; stipular sheath c. 1 mm long, with a subulate thickish appendage 1–2.5 mm long.Flowers solitary; peduncle 5–10 mm long; pedicels 5–8 mm long; bracts 2, minute, scarcely 1 mm long, lanceolate.Calyx tube 1–2 mm long, obconic, the limb 0.5–0.75 mm long undulate or shallowly toothed.Corolla apiculate in bud; greenish-white or yellowish, the lobes often a more distinct yellow; tube 4–6 mm long, funnel-shaped, with a ring of deflexed hairs below the throat inside; lobes triangular-lanceolate, 4–5 × 2 mm at the base, including the very short appendages.Stigma exserted about 1 mm; pollen presenter 1.5 mm long, ellipsoid, later subcoroniform, strongly 3-lobed at the apex.Ovary 3-locular.Fruit up to 8 × 10 mm with 1–3 pyrenes; pyrenes c. 8 mm long, deeply lobed in dry state.
Habitat
Woodland and thicket on Kalahari Sand; in Cryptosepalum and Baikiaea plurijuga–Burkea africana woodlands, and Brachystegia bakeriana thicket
Altitude range
c. 1500 m.
1500
1500
Distribution
Zambia S Machili, fl. 20.i.1961, Fanshawe 6152 (K; LISC; NDO).Zambia W Mwinilunga Distr., just east of R. Kasompa, fl. 1.ii.1938, Milne-Redhead 4440 (K).Zambia B Kalabo to Sikongo, 21 km, fr. 14.ii.1952, White 2073 (FHO; K).
Distribution (external)
Angola
Date Updated: 26 July 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora Zambesiaca
Resource Type
Reference Sources
Entry From
FZ, Vol 5, Part 2, (1998) Author: D. Bridson
Names
Rytigynia orbicularis K. Schum. Robyns [family RUBIACEAE], in Bull. Jard. Bot. État 11: 151 (1928). —F. White, F.F.N.R.: 420 (1962). —Verdcourt in Kew Bull. 42: 156 (1987). Type from Angola.
Plectronia orbicularis K. Schum. [family RUBIACEAE], in Warburg, Kunene-Samb.-Exped. Baum: 388 (1903).
Canthium orbiculare K. Schum. Good [family RUBIACEAE], in J. Bot. 64, Suppl. 2: 22 (1926).
Information
Glabrous subshrub or shrub 0.6–1.2 m tall, with rather slender somewhat glaucous much branched stems with reddish-brown eventually somewhat flaking bark.Leaves sometimes folded and curved downward, glaucous or blue-green, 1.2–5 × 0.8–4 cm, ovate to round, or elliptic, mostly shortly acutely acuminate at the apex but sometimes rounded or even slightly emarginate, rounded to usually distinctly cordate at the base, glaucous; petiole 1–5 mm long; stipular sheath c. 1 mm long, with a subulate thickish appendage 1–2.5 mm long.Flowers solitary; peduncle 5–10 mm long; pedicels 5–8 mm long; bracts 2, minute, scarcely 1 mm long, lanceolate.Calyx tube 1–2 mm long, obconic, the limb 0.5–0.75 mm long undulate or shallowly toothed.Corolla apiculate in bud; greenish-white or yellowish, the lobes often a more distinct yellow; tube 4–6 mm long, funnel-shaped, with a ring of deflexed hairs below the throat inside; lobes triangular-lanceolate, 4–5 × 2 mm at the base, including the very short appendages.Stigma exserted about 1 mm; pollen presenter 1.5 mm long, ellipsoid, later subcoroniform, strongly 3-lobed at the apex.Ovary 3-locular.Fruit up to 8 × 10 mm with 1–3 pyrenes; pyrenes c. 8 mm long, deeply lobed in dry state.
Habitat
Woodland and thicket on Kalahari Sand; in Cryptosepalum and Baikiaea plurijuga–Burkea africana woodlands, and Brachystegia bakeriana thicket
Altitude range
c. 1500 m.
1500
1500
Distribution
Zambia S Machili, fl. 20.i.1961, Fanshawe 6152 (K; LISC; NDO).Zambia W Mwinilunga Distr., just east of R. Kasompa, fl. 1.ii.1938, Milne-Redhead 4440 (K).Zambia B Kalabo to Sikongo, 21 km, fr. 14.ii.1952, White 2073 (FHO; K).
Distribution (external)
Angola
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