AFRICAN

ORCHIDS

Disperis katangensis var. katangensis
Description:
Terrestrial herb 5-20 cm tall, tuber c. 1 cm long, globose; leaves 2, alternate, 1-3 x 0.8-2 cm, ovate, cordate at base, deep dull green with whitish veins on upper surface, deep purple below; inflorescence 1-5 flowered, ovary 10-13 mm long, bracts leaf like, 6-20 mm; flowers pale mauve with yellow and purple marks inside hood; dorsal sepal 7-17 mm long, linear, adnate to petals to form an open hood 13-15 mm long, 5.5-11 mm deep and 15-18 mm wide across mouth; lateral sepals 12-15 x 6-11 mm, obliquely elliptic, apiculate, joined for quarter to one third their length, each with a sac-like spur up to 0.5 mm long; petals 7-17 x 7-11 mm, elliptic; lip 7.5-10 mm long, claw sharply bent back near base dilating into a densely papillate appendage, broadly reniform.
Habitat:
Brachystegia woodland 1500–1800 m.
Flowering time:
Dec - Frb
Distribution:
Zambia; Angola; Tanzania; Zaire;
References:
Flora Zambesiaca volume:11 part:1 (1995) Orchidaceae by I. la Croix and P.J. Cribb
Images:
Click on each image to see a larger version.

Habitat/In situ  Habitat/In situ  Habitat/In situ  Habitat/In situ  Habitat/In situ 
Disperis katangensis var. katangensis  01  Disperis katangensis var. katangensis 02 Disperis katangensis var. katangensis 03  Disperis katangensis var. katangensis 04  Disperis katangensis var. katangensis 05 
Photograph© Nicholas Case
Wightman Image used with kind
permission. 
Photograph© Nicholas Case
Wightman Image used with kind
permission.
 
Photograph© Nicholas
Case Wightman Image
used with kind
permission.
   
Photograph© Nicholas Case
Wightman Image used with kind
permission.
 
Photograph© Nicholas Case
Wightman Image used with kind
permission.
 





















Disperis guttata Frapp. ex Cordem., Fl. Réunion: 255 (1895).
Description :
Plante de 15-20 cent, de hauteur. Tig. flexueuse, ayant un diamètre d'1-2 millim. Feuill. 2-3, caulinaires, alternes, très espacées, passant brusquement à l'état de braci. vers le haut delà tige, sans changer de forme, mais en réduisant de plus de moitié leur dimension. Ces feuilles, dont la plus longue a 25 millim., avec 1 cent, de largeur à la base, sont deltoïdes, cordées, aiguës, amplexicaules, vert noir en dessus, violacées en dessous, un peu charnues, et laissant peu paraître, par suite de cette dernière circonstance, le réseau de veinules qui les parcourt en tout sens. FI. 1-2 assez petites, rosées, ayant tous les caractères du type générique, avec les particularités suivantes: Sép. latéraux parsemés de grosses taches vertes (d'où le nom spécifique); bras du rosi, largement spatules, et en tout plus grands que chez les autres espèces du même genre, dans l'ile.
Help wanted to an English translation, please write to me, if you know where this can be found.
Habitat:
Distribution:
Réunion

Disperis kilimanjarica Rendle in J. Linn. Soc., Bot. 30: 400, t. 32/8–10 (1895).
Description:

Epiphytic or terrestrial herb 5–12 cm tall; tuber 10–15 × 5–10 mm, ovoid. Leaves 2, alternate, 1.5–3.5 × 1.2 cm, ovate, cordate at base. Inflorescence single-flowered. Flowers white tinged with green and sometimes with mauve. Ovary and pedicel 10–11 mm long; bracts leaf-like, 10–15 × 7 mm, ovate. Dorsal sepal 8–16 mm long, joined to petals to form a blunt spur. Lateral sepals 7–12 × 3–5 mm, obliquely ovate, apiculate, each with a sac-like spur 1–2 mm long. Petals 8 × 4 mm, oblong, the free margin irregular. Lip 6 mm long, curved back into spur, the linear claw expanded into a triangular blade reflexed at the tip, with an oblong appendage 3 mm long arising at the point of reflexion, papillate at tip, almost reaching apex of the spur.
Habitat:

In montane or submontane forest on mossy branches and trunks of trees 1750–2250 m.
Distribution:

Kenya to Zambia

Disperis hildebrandtii Rchb.f., Otia Bot. Hamburg.: 73 (1878).
Descriptions:
Plants 10-20 cm tall: stem bare, with several sheaths basally, in the lower half, bearing above 3-4 rounded, embracing leaves, narrow (2.5-7 x 1-1.8 cm), rounded and embracing basally, alternate and very compressed; inflorescence several flowered, flowers very large. Hood wide and obtuse (8 x 12 mm), median sepal linear and 3 veined, petals semi-oval, very wide basally, very dilate on the external margin and very obtuse apically. Lateral sepals (10 x 5.5 mm) semi-oval, obtuse, 5 veined, the median projecting behind and with the median pouch wide and deep. Labellum abruptly cylindrical and narrow above the part joined to the column, enlarged in 3 very different appendages apically, the 2 laterals upright, thick, slightly recurved-lyrate apically, pubescent, provided on the internal surface with a channel with its margins ciliate, less acute and truncate apically, 1.8-2 mm long: median sessile, pendent from the front edge, very thick, in the form of a wide tail, arched-reflexed, flat basally, hollowed below, attenuate to a point apically, pubescent below and on the margins, covered above with very dense hairs, 5 mm long. Anther narrow (1.5 x 1 mm); cauda very thick and short, viscidiums discoidal, flat (0.6 mm in diameter) Rostellum large (2.2 x 1.5 mm), arms long (1.7 mm), bent and spatulate apically.
Habitat:
Quite frequent in the understorey of humid to semi-dry woodland and forest in the N-NE and Centre of Madagascar and on Mayotte, on laterite soils derived from gneiss or from basalt; 90-1400 m.
Phenology:
Flowering in December-January.
Cultivation:
As given for the genus, hot to cool growing terrestrial.
Distribution:
Comoros (Mayotte), N. Madagascar
References:
The genus Disperis (Orchidaceae) in Madagascar, the Comores, the Mascarenes and the Seychelles, ADANSONIA, sér. 3-2002 -24 (1) : 55-87; The Orchids of Madagascar Hermans, Du Puy, Cribb and Bosser 2007; Field Guide to the Orchids of Madagascar Cribb & Hermans 2009; A synopsis of the genus Disperis Sw. (Orchidaceae), ADANSONIA, sér. 3 - 2005 - 27 (2) : 155-207
Images:
Click on each image to see a larger version.

Habitat/In situ  Habitat/In situ  Habitat/In situ  Habitat/In situ  Habitat/In situ  Habitat/In situ  Habitat/In situ 
disperis hildebradtii 07  disperis hildebradtii 08  disperis hildebradtii 09  disperis hildebradtii 10  disperis hildebradtii 05  disperis hildebradtii 11
 
disperis hildebradtii 01 
Photograph© Etienne Vennetier
Image used with kind permission.
Photograph© Etienne Vennetier
Image used with kind permission. 
Photograph© Etienne Vennetier
Image used with kind permission. 
Photograph© Etienne Vennetier
Image used with kind permission. 
Photograph© Etienne Vennetier
Image used with kind permission. 
Photograph© Etienne Vennetier
Image used with kind permission. 
Photograph© Etienne Vennetier
Image used with kind permission.






















Disperis kerstenii Rchb.f., Otia Bot. Hamburg.: 102 (1881).
Description:

Plants 150-300 mm. Leaves 2, opposite, ovate, 32-39 × 20-24 mm. Flowers 2-4, pink; median sepal linear, forming curved ascending spur 8- 12 mm long together with petals, lateral sepals obovate, 9 × 5-7.5 mm, free; petals with long posterior lobe, and apical and basal anterior lobes, shortly clawed; lip about 9-13 mm long, blade descending, oblong, appendage of two narrow bifurcate lobes.
Habitat:

In humus or moss on rocks on the floor of evergreen forests from 1350 to 2250 m. Flowering from April to August.
Distribution:

Tanzania.