This culture sheet was provided by Charles and Margaret Baker.
Please visit their web site to find out about their Orchid Species Culture books,
Pollination Database, and culture sheet subscription service.
An Introduction to Climate Tables and how to use them is
ORCHID SPECIES CULTURE Charles and Margaret Baker Macroclinium bicolor (Lindley) Dodson AKA: Notylia bicolor Lindley. In 1881 Barbosa-Rodrigues described the genus Macroclinium, but the plants originally placed in the new genus were later transferred to the genus Notylia. For many years, the genus Notylia was divided into two convenient sections based on vegetative habit. In section Macroclinium, leaves are equitant, distichous, and overlap like shingles on a roof. The folded bases sometimes hide a small, compressed pseudobulb. In the second section, Eunotylia, plants had small but distinct pseudobulbs with a single flat leaf. Dodson (1984) stated that there were sufficient differences to justify genus status for each section, and plants in section Macroclinium were moved back to the genus Macroclinium, and plants in section Eunotylia were left in the genus Notylia. ORIGIN/HABITAT: Reported from Mexico, Guatemala, El Salvador, and Costa Rica. However, Mexican plants that were originally referred to under this name are now listed as a separate genus. Dressler (1993) reported that the Costa Rican plants previously thought to be Macroclinium bicolor are actually Macroclinium ramonense, so it appears that this species is limited to Guatemala and El Salvador. In Guatemala, plants grow on forest trees at 4800 ft. (1460 m). Plants have been found in several locations near Guatemala City and at other locations in the region. In El Salvador, plants were found on Cerro Grande de Apaneca at 5600 ft. (1700 m). CLIMATE: Station #78641, Guatemala City, Guatemala, Lat. 14.6N, Long. 90.5W, at 4885 ft. (1489 m). Temperatures are calculated for an elevation of 4800 ft. (1460 m), resulting in probable extremes of 88F (31C) and 41F (5C). N/HEMISPHERE JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC F AVG MAX 72 74 77 80 79 76 77 77 75 72 72 71 F AVG MIN 52 53 55 58 60 59 59 59 59 57 55 54 DIURNAL RANGE 20 21 22 22 19 17 18 18 16 15 17 17 RAIN/INCHES 0.1 0.0 0.7 0.8 4.5 10.0 11.0 9.0 10.4 4.1 0.6 0.6 HUMIDITY/% 75 72 74 73 74 81 77 81 84 80 78 77 BLOOM SEASON N/A DAYS CLR @ 6AM 10 8 12 5 2 1 0 2 0 2 8 10 DAYS CLR @ 12PM 18 21 22 18 5 2 2 5 1 7 10 14 RAIN/MM 3 0 18 20 114 254 279 229 264 104 15 15 C AVG MAX 22.2 23.3 25.0 26.7 26.1 24.6 25.1 25.0 23.9 22.2 22.2 21.7 C AVG MIN 11.1 11.8 12.9 14.6 15.7 15.2 15.2 15.2 15.2 14.0 12.9 12.4 DIURNAL RANGE 11.1 11.5 12.1 12.1 10.4 9.4 9.9 9.8 8.7 8.2 9.3 9.3 S/HEMISPHERE JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN Cultural Recommendations: LIGHT: 1200-2000 fc. Plants need filtered or diffused light and need protection from direct sun. Strong air movement should be provided at all times. TEMPERATURES: Summer days average 76-77F (25C), and nights average 59F (15C), with a diurnal range of 17-18F (10C). HUMIDITY: 75-80% most of the year, dropping briefly to near 70% for a month or so in winter. WATER: Rainfall is moderate to heavy from late spring into autumn. Averages then drop rapidly into a dry season that extends from late autumn to the following spring. Cultivated plants should be watered heavily while actively growing, but drainage must be excellent, and conditions around the roots should never be stale or soggy. Water should be reduced in autumn after new growths have matured. FERTILIZER: 1/4-1/2 recommended strength, applied weekly when plants are actively growing. Many growers use a balanced fertilizer throughout the year. Others prefer to use a high-nitrogen fertilizer from spring to midsummer, then switch to a high-phosphate formula in late summer and autumn. REST PERIOD: Winter days average 71-74F (22-23C), and nights average 52-54F (11-12C), with a diurnal range of 17-21F (9-12C). Rainfall is light for about 6 months from late autumn into early spring. Even during the dry season, however, some moisture is still available from heavy dew and nighttime mist. Cultivated plants need less water in winter, but they should not be dry for very long. Fairly frequent early-morning mistings between infrequent light waterings should provide enough moisture in most growing areas while, at the same time, providing the required dry rest. Fertilizer should be reduced or eliminated until new growth starts and heavier watering is resumed in spring. GROWING MEDIA: Macroclinium bicolor may do best if tightly mounted to tree-fern slabs or blocks. Mounted plants need high humidity, however, and during hot, dry weather may require several waterings a day. If it is difficult to keep mounted plants moist, they may be grown in small pots or baskets using a very open, fast draining medium that breaks down slowly. These plants take a long time to recover after being disturbed, so they should be disturbed as infrequently as possible. A good potting mix for these plants is shredded tree-fern fiber with chopped sphagnum moss and chunky perlite added to hold the medium open and well aerated and also retain some moisture. Adding charcoal to the mix also helps hold the medium open and keeps it from becoming sour. Plants should be repotted immediately if the medium starts to break down or every few years if the plant outgrows its pot. Repotting is best done just as new roots start to grow enables the plant to become reestablished in the shortest possible time. MISCELLANEOUS NOTES: N/A. Plant and Flower Information: PLANT SIZE AND TYPE: A small, 2 in. (5 cm) sympodial epiphyte. PSEUDOBULB: 0.2-0.4 in. (0.5-1.0 cm) long by about 0.2 in. (0.5 cm) wide. Plants may grow into clumps which are 1.4-.4..0 in. (3.5-10.0 cm) long. The small, egg-shaped pseudobulb is laterally flattened and completely concealed by leaf-sheaths. The thick sheaths are densely clustered, folded longitudinally along the midvein, with a longitudinally folded, leaflike blade at the apex. The sheaths have conspicuous transparent or translucent margins. LEAVES: 0.6-2.0 in. (1.5-5.0 cm) long by 0.2-0.4 in. (0.4-1.0 cm) wide. A single elliptic-lanceolate to linear-lanceolate leaf is carried at the apex of the pseudobulb with several equitant leaves carried on the sheaths at the base of the pseudobulb. The sharply pointed leaves are sickle-shaped, rigid, and fleshy. INFLORESCENCE: 1.0-3.7 in. (2.5-9.5 cm) long. The peduncle emerges at the base of the pseudobulb. It is thin and threadlike, erect-ascending to pendent, and carries many flowers in a dense raceme on the apical half. Each blossom is carried on a threadlike, pedicellate ovary that is about 0.3 in. (0.8 cm) long. FLOWERS: Numerous. The small blossoms are about 0.7 in. (1.8 cm) long with narrow, sharply pointed sepals and petals that do not open fully. Sepals and petals are white, but the petals are marked with dull purple spots. The lip is whitish-purple with a pair of darker purple spots on the disc. The linear-lanceolate sepals are 0.4-0.6 in. (0.9-1.5 cm) long by 0.1 in. (0.1-0.2 cm) wide below the middle. The dorsal sepal is longitudinally concave and curves forming a hood over the column. The base of the sickle-shaped lateral sepals are united for about 0.1 in. (0.1 cm). The obliquely lanceolate petals are 0.3-0.5 in. (0.8-1.2 cm) long by 0.1 in. (0.13-0.15 cm) wide near the base. They point forward at the base hiding each side of the column but then curve somewhat downward toward the tip. The lip is attached to the base of the column with a slender, convex-folded claw that is 0.1 in. (0.1-0.15 cm) long. The blade of the lip is spreading, vaguely shaped like an arrow-head at the base with a small somewhat grooved callus between earlike appendages. The lip is linear to near the middle where it widens abruptly then tapers to a long, narrow, sharply pointed tip that curves sharply downward near the middle. Overall, the lip is 0.2-0.4 in. (0.5-0.9 cm) long by 0.1 in. (0.2 cm) wide across the widest point near the middle. The erect column is 0.2 in. (0.4-0.5 cm) long and somewhat terete toward the base with a slightly dilated apex. HYBRIDIZING NOTES: N/A. REFERENCES: Ames, O. and D. Correll. (1952-1965) 1985. Orchids of Guatemala and Belize. Dover Publications, New York. Dodson, C., and P. de Dodson. 1984. Orchids of Ecuador. Fasc. 10, plates 901-1000. Icones Plantarum Tropicarum. See Plates 937-939. The Marie Selby Botanical Gardens, 811 South Palm Avenue, Sarasota, FL 33577. Hamer, F. 1964. Orchids of El Salvador, vol. 2. The Marie Selby Botanical Gardens, 811 South Palm Avenue, Sarasota, FL 33577. Hawkes, A.  1987. Encyclopaedia of cultivated orchids. Faber and Faber, London. PHOTOS/DRAWINGS: Ames, O. and D. Correll. (1952-1965) 1985. Orchids of Guatemala and Belize. Dover Publications, New York. (Drawing) Hamer, F. 1964. Orchids of El Salvador, vol. 2. The Marie Selby Botanical Gardens, 811 South Palm Avenue, Sarasota, FL 33577. Copyright 1999, Charles O. Baker and Margaret L. Baker Sheet version 65801897 ......................................................................... 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. "The genus Paphiopedilum--Natural History and Cultivation" - Part 2 Dr. Guido Braem, Charles and Margaret Baker ISBN 0-9665337-1-2 Full page color photograph of each species. "Orchid Species Culture Vol. 3 - The Laelia/Cattleya Alliance" coming in a few months. __________________________________________________________________________