AFRICAN

ORCHIDS

Ancistrorhynchus paysanii Senghas, J. Orchideenfr. 8: 163 (2001).
Description:
Differt a A. straussio caulibus brevioribus, floribus omnino albis, labello integro (ex icone). Ancistrorhynchus paysanii ist lediglich zu ergänzen, dass die Blütenstände immer nur 2-blütig, die duftlosen Blüten selbst rein weiß und nur halb geöffnet sind. Ihre Blätter messen nur 30 x 5 mm.
Habitat:
?

Culture:
Als Tropenbewohner handelt es sich um Warmhausarten. Sehr reiche Bildung an unverzweigten Wurzeln, daher bietet sich die Sandwichkultur an, mit einem Aufbau aus Tonscherben und Styroporbrocken, versehen mit einer dünnen Moosauflage. Keine Ruhezeit. Während der lichtreichen Monate viel Wasser - auch Dünger - und jeweils anschließend kräftige Luftzirkulation. Schlecht sieht es mit der Möglichkeit vegetativer Vermehrung aus, denn die Verzweigungstendenz der sehr langsam wachsenden Fächersprosse ist bei den großen Arten, die auch die häufigeren in der Kultur sind, äußerst dürftig. Daher nach Möglichkeit Selbstbestäubung vornehmen, sie ist möglich und führt zu fertilen Samen.
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Distribution:
Kenya
Reference:
Journal für den orchideenfreund heft.2 2001; WCSP (2017). 'World Checklist of Selected Plant Families. 10.03-2017; http://apps.kew.org/wcsp/
Images:
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Ancistrorhynchus tenuicaulis Summerh., Kew Bull. 8: 590 (1953 publ. 1954).
Description:
Plants with erect or curved stems, 2–16 cm high, 2 mm in diameter, with few narrow roots, 1–2 mm in diameter. Leaves linear, clustered near apex of stem, unequally bilobed at the apex, each lobe subacute or obscurely 2-toothed, articulated to rugulose leaf bases, 2–7.2 cm long, 4–5 mm wide. Inflorescences capitate, dense, 4–5 mm long, many-flowered; bracts elliptic, obtuse, 2–3 mm long; pedicel with ovary 3 mm long. Flowers white; dorsal sepal oblong-elliptic, rounded, 1.5–3.5 mm long, 0.9–1.3 mm wide; lateral sepals obliquely elliptic-oblong, obtuse, 2–3.5 mm long, 1–1.2 mm wide; petals elliptic, rounded, 1.7–3 mm long, 0.7–1.4 mm wide; lip concave, ovate, obtuse, 1.4–2.5 mm long, 1.4–2.4 mm wide; spur globose or club-shaped, 1–2 mm long.
Habitat:
Epiphyte in lowland and submontane primary forest. In Rio Muni, specimens were also collected in the forest fringe of an inselberg. Altitudinal range from 400 to 1200 m. Flowering peaks between May and July.
Cultivation:
As given for the genus, warm to cool growing epiphyte.
Notes:
This is one of the small-flowered species, somewhat similar to Ancistrorhynchus parviflorus in Tanzania and to Ancistrorhynchus schumannii and Ancistrorhynchus straussii from west and central.
Distribution:
Gabon to Uganda and Malawi
References:
Flora of Tropical East Africa Orchidaceae Cribb 1989; Angraecoid Orchids Stewart, Hermans and Campbell 2006; WCSP (2017). 'World Checklist of Selected Plant Families. 10.03-2017; http://apps.kew.org/wcsp/
Images:
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Ancistrorhynchus serratus Summerh., Kew Bull. 20: 195 (1966).
Description:
Plant with erect stems, sometimes branched, up to 10 cm long. Leaves in 2 rows, spaced close together near apex of stem, linear-ligulate, with rounded apical lobes that are irregularly serrate, 5–11 cm long, 7–10 mm wide. Inflorescences capitate, dense, 1 cm long, several- to many-flowered; bracts chaffy, shorter than the pedicel with ovary. Flowers white; sepals oblong-elliptic, 3–3.5 mm long, 1.25 mm wide; petals oblanceolate, acute, 3 mm long, 1 mm wide; lip obscurely 3-lobed, distinctly broader than long, 2.5 mm long, 4.25 mm wide; spur straight, funnel-shaped at first, then constricted, finally inflated in the apical quarter, 4–4.5 mm long.
Habitat:
Epiphyte in forest; ca. 1500 m; flowering in May.
Cultivation:
As given for the genus, cool growing epiphyte.
Distribution:
Bioko, S. Nigeria to Cameroon
References:
African Orchids in the Wild and Cultivation La Croix 1997; Angraecoid Orchids Stewart, Hermans and Campbell 2006; WCSP (2017). 'World Checklist of Selected Plant Families. 10.03-2017; http://apps.kew.org/wcsp/
Images:
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Ancistrorhynchus straussii (Schltr.) Schltr., Beih. Bot. Centralbl. 36(2): 139 (1918).
Homotypic Synonyms:
Angraecum straussii Schltr., Bot. Jahrb. Syst. 38: 164 (1906).
Cephalangraecum straussii (Schltr.) Summerh. in J.Hutchinson & J.M.Dalziel, Fl. W. Trop. Afr. 2: 462 (1936).
Description:
Plant erect with a short stem 2.5 cm long. Leaves 5–7, linear, or linear-lanceolate, unequally bilobed at the apex, the lobes rounded, entire or finely denticulate, 5–13 cm long, 3–13 mm wide. Inflorescences capitate, dense, 5- to 14-flowered; bracts oblong-elliptic, 3–4 mm long; pedicel with ovary 4 mm long. Flowers very small, white with 2 green spots on the lip; sepals oblong-elliptic, obtuse, 2.6 mm long, 1 mm wide; petals similar to the sepals; lip concave, obscurely 3-lobed, the lobes rounded, 2.7 mm long, 3 mm wide; spur straight, inflated at the middle, narrowing towards both ends, 1.5–3.5 mm long.
Habitat:
In primary forest; 700 m.
Cultivation:
As given for the genus, hot to warm growing epiphyte.
Distribution:
Nigeria to WC. Trop. Africa
References:
Angraecoid Orchids Stewart, Hermans and Campbell 2006; WCSP (2017). 'World Checklist of Selected Plant Families. 10.03-2017; http://apps.kew.org/wcsp/
Images:
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Ancistrorhynchus schumannii (Kraenzl.) Summerh., Kew Bull. 3: 281 (1948).
Homotypic Synonyms:
Angraecum schumannii Kraenzl., Mitt. Deutsch. Schutzgeb. 2: 159 (1889).
Mystacidium schumannii (Kraenzl.) Rolfe in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 7: 173 (1897).
Phormangis schumannii (Kraenzl.) Schltr., Beih. Bot. Centralbl. 36(2): 104 (1918).
Tridactyle schumannii (Kraenzl.) Summerh. in J.Hutchinson & J.M.Dalziel, Fl. W. Trop. Afr. 2: 463 (1936).
Description:
Plant erect with a stem up to 15 cm long. Leaves oblong, almost equally lobed at the apex, 1.5–6 cm long, 2–7.5 mm wide. Inflorescences small, 1- to 3-flowered; bracts 2–3 mm long. Flowers white; sepals and petals oboval, obtuse, 2–3 mm long, 1–1.5 mm wide; lip broadly oval, rounded, 2–3 mm long, 1.5–2.5 mm wide; spur narrow below the lip then sub ellipsoid, 2–2.5 mm long.
Habitat:
Epiphyte in dense forest.
Cultivation:
As given for the genus, hot to warm growing epiphyte.
Distribution:
S. Nigeria to WC. Trop. Africa
References:
ngraecoid Orchids Stewart, Hermans and Campbell 2006 ; WCSP (2017). 'World Checklist of Selected Plant Families. 10.03-2017; http://apps.kew.org/wcsp/
Images:
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