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ORCHID SPECIES CULTURE Charles and Margaret Baker Domingoa haematochila (Rchb. f.) Carabia AKA: Epidendrum hymenodes Rchb. f. not Lindley, Epidendrum haematochilum Rchb. f., Epidendrum broughtonioides Grisebach, Domingoa hymenodes (Rchb. f.) Schlechter. Plants were originally described as Epidendrum hymenodes by Reichenbach in 1865. Unfortunately, another plant had already been described by LIndley using the same name, making Reichenbach's name invalid for use with this plant. The mistake was not discovered, however, and it was then compounded when Schlechter founded the new genus with Domingoa hymenodes as the type species for the genus. ORIGIN/HABITAT: Cuba, Hispaniola, and Puerto Rico. These plants usually grow with their roots firmly attached to small branches and twigs In Cuba, plants are found in the Sierra de Linares in Pinar del Río. Habitat elevation has been estimated, so the following temperatures should be used with caution. CLIMATE: Station #78315, Pinar del Río, Cuba, Lat. 22.4N, Long. 83.7W, at 164 ft. (50 m). Temperatures are calculated for an elevation of 1650 ft. (500 m), resulting in probable extremes of 99F (37C) and 41F (5C). N/HEMISPHERE JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC F AVG MAX 74 75 79 81 84 84 86 86 84 81 77 75 F AVG MIN 59 59 61 63 67 69 70 70 69 68 63 60 DIURNAL RANGE 15 16 18 18 17 15 16 16 15 13 14 15 RAIN/INCHES 1.8 1.7 2.5 2.6 7.0 10.3 6.6 7.0 10.7 7.7 2.5 1.4 HUMIDITY/% 79 80 76 76 80 84 79 79 87 84 80 86 BLOOM SEASON * ** ** DAYS CLR @ 6AM 11 10 15 15 13 10 11 13 10 17 14 18 DAYS CLR @ 12PM 5 5 5 1 4 1 1 2 2 4 5 8 RAIN/MM 46 43 64 66 178 262 168 178 272 196 64 36 C AVG MAX 23.3 23.9 26.1 27.2 28.9 29.1 30.1 30.0 28.9 27.2 25.0 23.9 C AVG MIN 15.0 15.1 16.2 17.3 19.5 20.6 21.2 21.2 20.6 20.1 17.3 15.6 DIURNAL RANGE 8.3 8.8 9.9 9.9 9.4 8.5 8.9 8.8 8.3 7.1 7.7 8.3 S/HEMISPHERE JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN Cultural Recommendations: LIGHT: 2500-3000 fc. Light should be somewhat filtered or diffused, and plants should not be exposed to direct midday sun. Brisk air movement should be provided at all times. TEMPERATURES: Summer days average 84-86F (29-30C), and nights average 69-70F (21C), with a diurnal range of 15-16F (9C). HUMIDITY: 80-85% most of the year, dropping to near 75% for about 2 months in late winter and early spring. WATER: Rainfall is heavy from late spring into autumn but diminishes rapidly into a 3-4 month winter dry season. Cultivated plants should be watered frequently while actively growing FERTILIZER: 1/4-1/2 recommended strength, applied weekly during the growing season. A high-nitrogen fertilizer is beneficial from spring to midsummer, but a fertilizer high in phosphates should be used in late summer and autumn. REST PERIOD: Winter days average 74-75F (23-24C), and nights average 59-60F (15-16C), with a diurnal range of 15-16F (8-9C). Rainfall is relatively low for 3-4 months in winter, but additional moisture is generally available from heavy dew. Cultivated plants need less water in winter. They should be allowed to dry out between waterings but should not remain dry for extended periods. Fertilizer should be reduced or eliminated until new growth starts and heavier watering is resumed in spring. GROWING MEDIA: Growers report that plants are best grown on a slab of rough cork without any medium around the roots. Plants grown on slabs should be watered daily in summer, however, and several waterings a day may be necessary during particularly hot, dry weather. If grown in pots, a very open, fast-draining medium should be used and the pot hung where high light and strong air movement are available. MISCELLANEOUS NOTES: The bloom season shown in the climate table is based on cultivation records as D. hymenodes. Plant and Flower Information: PLANT SIZE AND TYPE: A 4-12 in. (11-30 cm) sympodial epiphyte. PSEUDOBULB: To 1.5 in. (3.8 cm) long. The thin, stemlike pseudobulbs, which are covered with sheaths, are vaguely angular and become slightly narrower toward the base. Plants are vegetatively similar to a Pleuroallidinae. LEAVES: 1.5-3.5 in. (3.8-8.9 cm) long by 0.5 in. (1.2 cm) wide. The solitary, papery leaves are dark green, lanceolate-elliptic or lanceolate-ovate, and sharply or bluntly pointed. INFLORESCENCE: To about 6 in. (15 cm) long. The inflorescence emerges from the top of the pseudobulb and is completely covered by bracts. FLOWERS: Few. Blossoms on the few-flowered raceme usually open successively over a rather long period of time. The faintly fragrant flowers, which are about 1 in. (2.5 cm) across, are almost translucent in texture, usually whitish green with longitudinal purplish lines. The lip is generally dark brownish purple in the center. The more or less spreading sepals and petals are lanceolate-ovate with sharply pointed tips. The slender column is 2-winged at the apex and dilated into a foot at the base. HYBRIDIZING NOTES: N/A. REFERENCES: Gale, J. [Not dated.] 1987. Catalogo Descriptivo de las Orquideas Cubanas. Boletin No. 60 of the Estacion Experimental Agronomica Santiago de las Vegas. Reprinted by Bishen Singh Mahendra Pal Sing, Dehra Dun, India. Hamilton, R. 1988. When does it flower? 2nd ed. Robert M. Hamilton, 9211 Beckwith Road, Richmond, B.C., Canada V6X 1V7. Hawkes, A.  1987. Encyclopaedia of cultivated orchids. Faber and Faber, London. Withner, C. 1996. The cattleyas and their relatives, vol. 4: the Bahamian and Carribean species. Timber Press, Portland, OR. PHOTOS/DRAWINGS: Withner, C. 1996. The cattleyas and their relatives, vol. 4: the Bahamian and Carribean species. Timber Press, Portland, OR. Copyright 1998, Charles O. Baker and Margaret L. Baker Sheet version 31280135 ......................................................................... Please remember that this sheet is for your use only, and though it was provided free of charge, it may not be reproduced or retransmitted in any way without permission. ......................................................................... __________________________________________________________________________ "Orchid Species Culture" Charles & Margaret Baker, Portland, Oregon USA Orchid Culture & Pollination site http://www.orchidculture.com email <email@example.com> __________________________________________________________________________ "Orchid Species Culture Vol. 1 - Pescatorea, Phaius, Phalaenopsis, Pholidota, Phragmipedium, Pleione" 250 pages of culture information. "Orchid Species Culture Vol. 2 - Dendrobium" 850 pages of culture information for more than 1230 Dendrobium species. "The genus Paphiopedilum--Natural History and Cultivation" - Part 1 Dr. Guido Braem, Charles and Margaret Baker ISBN 0-9665337-0-4 Full page color photograph of each species. 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