Publication: Philos. Mag. Ann. Chem. (1824) 300.
Description
The name Haworthia asperula has been applied at various times to Haworthia pygmaea, Haworthia maglifica, Haworthia magnifica var. maraisii, Haworthia pubescens, Haworthia emelyae, Haworthia mutica and to hybrids of the previous listed plants, it is now such a source of confusion that it should not been used.
Original description in “Flora Capensis”, page 253 (1897) Author: (By J. G. Baker).:
leafy stem very short; rosette 2 1/2–3 in. diam.; leaves 10–12, multifarious, deltoid, very recurved, 1–1 1/2 in. long, 3/4 in. broad, 1/3– 1/2 in. thick in the centre, pale green on both sides, scabrous on the face, with minute concolorous papillæ and marked in the upper half with 7–9 vertical pale green lines, rounded and smooth on the back and keeled in the upper half; peduncle slender, simple; raceme lax, few-flowered; pedicels very short; bracts minute, deltoid; perianth 5/8 in. long; limb 1/3– 1/2 as long as the tube.
Origin and Habitat
South Africa: without locality.
Bibliography
Major references and further lectures
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Urs Eggli “Illustrated Handbook of Succulent Plants: Monocotyledons” Springer, 2001
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Charles L. Scott “The genus Haworthia (Liliaceae): a taxonomic revision” Aloe Books, 1985
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Stuart Max Walters “The European Garden Flora: Pteridophyta, Gymbospermae, Angiospermae-Monocotyledons” Cambridge University Press, 1984
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M. B. Bayer “The new Haworthia handbook” National Botanic Gardens of South Africa, 1982
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John Pilbeam “Haworthia and Astroloba: A Collector’s Guide” B. T. Batsford Limited, 1983
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Gordon D. Rowley “The illustrated encyclopedia of succulents” Crown Publishers, 01/Aug/1978
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Adrian Hardy Haworth “A new Arrangement of the Genus Aloe, with a chronological Sketch of the progressive Knowledge of that Genus, and of other succulent Genera.” In: Transactions of the Linnean Society of London. Volume 7, Number 1, London 1804