AFRICAN

ORCHIDS

Stolzia Schltr., Bot. Jahrb. Syst. 53: 564 (1915).
Description:
Dwarf, mat-forming epiphytic herb, rarely lithophytic; stems creeping, bearing pseudobulbs. Pseudobulbs asymmetrical ovoid, fusiform or clavate, 1–2-leaved at the apex. Leaves fleshy or leathery, spreading or erect. Inflorescence terminal on the pseudobulb, erect, 1- to many-flowered. Flowers secund, somewhat campanulate, green, yellow, orange, brown or red, sometimes striped. Lateral sepals joined at the base, forming a mentum with the column-foot. Lip entire, recurved, V-shaped in cross-section, not spurred. Column-foot at least three times as long as the column; pollinia 8, comprising 4 large and 4 small pollinia; stigma concave, with a flap-shaped rostellum in front.
Distribution:
Trop. Africa
Notes:
This genus of small creeping epiphytes was named in honour of Adolf Stolz, a German missionary who lived in southwest Tanzania for many years, and who made many important orchid collections around Tukuyu where he was based.
All the species of Stolzia are small, creeping or upright epiphytes which produce chains of small pseudobulbs that appear to creep over the surface of branches and rocks. Each pseudobulb bears one or two leathery leaves at its apex, and an inflorescence arises between them. Ten species have been described from Tanzania but only one from Kenya. It is the most widespread of all the species and is easily recognized by its single bright red or orange flower that is almost stem less and borne between the leaves. From a little distance the plants resemble a mossy carpet and are sometimes con- fused with small plants of Peperomia species when not in flower.
Cultivation:
Small mats of the creeping stems of this orchid are not difficult to establish on a piece of bark or tree fern fibre. However, they need cool, humid conditions and are not easy to keep alive if there is continuous hot weather. They are not difficult to maintain under glass in cool conditions. They respond well to frequent misting and thrive in a shady position.
Species:

Stolzia angustifolia Mansf. Tanzania (NW. Uluguru Mts.).
Stolzia atrorubra Mansf. Tanzania (Uluguru Mts.).
Stolzia christopheri P.J.Cribb SW. Tanzania.
Stolzia compacta P.J.Cribb SW. Tanzania to E. Zimbabwe.
Stolzia compacta subsp. compacta Malawi (Nyika Plateau).
Stolzia compacta subsp. iringana P.J.Cribb SW. Tanzania.
Stolzia compacta subsp. purpurata P.J.Cribb S. Malawi to E. Zimbabwe.
Stolzia cupuligera (Kraenzl.) Summerh. NE. Zaïre to Rwanda.
Stolzia elaidium (Lindl.) Summerh. W. & WC. Trop. Africa.
Stolzia grandiflora P.J.Cribb Ethiopia.
Stolzia grandiflora subsp. grandiflora Ethiopia
Stolzia grandiflora subsp. lejolyana Stévart, Droissart & M.Simo, WC. Trop. Africa
Stolzia leedalii P.J.Cribb SW. Tanzania.
Stolzia moniliformis P.J.Cribb Tanzania (Uluguru Mts.).
Stolzia nyassana Schltr. Tanzania.
Stolzia oligantha Mansf. Tanzania (NW. Uluguru Mts.).
Stolzia peperomioides (Kraenzl.) Summerh. WC. Trop. Africa.
Stolzia peperomioides subsp. peperomioides WC. Trop. Africa.
Stolzia peperomioides subsp.thomensis (Stévart & P.J.Cribb) Stévart, Droissart & M.Simo São Tomé.
Stolzia repens (Rolfe) Summerh. Trop. Africa.
Stolzia repens var. cleistogama Stévart, W. & WC. Cameroon
Stolzia repens var. obtusa G.Will. Rwanda to E. Zimbabwe.
Stolzia repens var. repens. Trop. Africa.
Stolzia viridis P.J.Cribb Tanzania (Uluguru Mts.).
Stolzia williamsonii P.J.Cribb Rwanda to N. Malawi.

World Checklist of Monocotyledons. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/monocots/ accessed 1/16/2010
Bibliography and References:
Cribb PJ. 1978 A revision of Stolzia (Orchidaceae). Kew Bull. 33. (1): 79 - 89 (1978)
Cribb PJ. 1979 New or little known orchids from East Africa. Kew Bull. 34. (2): 321 - 340 (1979)
Cribb PJ. 1981 A new species of Stolzia (Orchidaceae) from Tanzania. Kew Bull. 36. (3): 639 - 641 (1981)
Droissart, V., Simo, M., Sonké, B., Cawoy, V. & Stévart, T. (2009) Le genre Stolzia (Orchidaceae) en Afrique centrale avec deux nouvea
taxons. Adansonia, sér. 3, 31(1), 25-40.
Pottinger M. 1982 African orchids. Plectrelminthus to Ypsilopus. Orchid Rev. 90. (1070): 384-385 (1982)
Stevart T, Cribb P. 2004 New species and records of Orchidaceae from Sao Tome and Principe. Kew Bull. 59. (1): 77-86 (2004)
Williamson G. 1976 Some interesting miniature Epiphytes. Orchid Rev. 84. (996)
Williamson G. 1980 Studies in Orchidaceae from South Central Africa. (Studies van Orchidaceae vanaf Suid Sentraal Afrika.) J.S. Afr. Bot. 46.
(4): 329 - 342 (1980)