Holothrix
(pronounced: HOH-loh-thricks)
Classification
Orchideae subtribe Orchidinae
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Overview
Terrestrials arising from tubers. Leaves 1--2, appressed to the substrate, suborbicular. Inflorescences terminal, erect, long-pedunculate spicate racemes. Flowers cupped. Sepals and petals free, spreading, the petals dissected. Lip unlobed to three-lobed, sometimes dissected, subsimilar to the petals, spurred. Column short; pollinia 2, granular, on short caudicles and minute separate viscidia.
Etymology
From the Greek holos, meaning whole, and thrix (trichos), meaning hair, referring to the trichomes on the leaves, inflorescences and sepals.
Distribution
A genus of 55 species from tropical Arabia to South Africa.
Care and Culture Card
See basic growing conditions and care information below.
Grow plants of Holothrix in pots with sandy loam. Provide full light, cool-intermediate temperatures, and regular watering throughout the growing season. After flowering, reduce watering somewhat but do not force the plants into complete dormancy.
Literature
Immelman, K. 1981. Notes on South African species of Holothrix. Bothalia 13(3-4):455-456. Kidson, S. and E. Fletcher 1984. Holothrix randii Rendle. S. Afr. Orchid J. 15(1):14-15. Kidson, S. and E. Fletcher 1990. Our heritage, Holothrix schlechteriana Kraenzl. S. Afr. Orchid J. 21(4):80-81. Kidson, S. and E. Fletcher 1991. Our heritage, Holothrix orthoceras (Harv.) Reichb.f. S. Afr. Orchid J. 22(3):68-69. Peters, H. 1992. Hairy spiders, Holothrix randii Rendle. S. Afr. Orchid J. 23(2):37. Schelpe, E. A. 1977. A review of the summer rainfall area species of Holothrix in South Africa. S. Afr. Orchid J. 8(1):5-6. van der Walt, H. and M. van der Walt 1995. Holothrix, a new species. S. Afr. Orchid J. 26(1):16-17.
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