Origin and Habitat: South Africa (Eastern Cape Province, north of East London)

• Haworthia cooperi var. truncata (H.Jacobsen) M.B.Bayer
• Haworthia cooperi var. obtusa hort.
• Haworthia obtusa f. truncata H.Jacobsen

• Haworthia cooperi var. truncata (H.Jacobsen) M.B.Bayer
• Haworthia cooperi var. obtusa hort.
• Haworthia obtusa f. truncata H.Jacobsen

• Haworthia cooperi Baker
• Catevala cooperi (Baker) Kuntze
• Haworthia cooperi f. variegata hort.
• Haworthia vittata Baker
• Catevala vittata (Baker) Kuntze

• Haworthia cooperi var. dielsiana (Poelln.) M.B.Bayer
• Haworthia dielsiana Poelln.
• Haworthia obtusa var. dielsiana (Poelln.) Uitewaal
• Haworthia pilifera var. dielsiana (Poelln.) Poelln.
• Haworthia joeyae C.L.Scott

• Haworthia cooperi var. doldii M.B.Bayer
• Haworthia doldii (M.B.Bayer) M.Hayashi

• Haworthia cooperi var. gordoniana (Poelln.) M.B.Bayer
• Haworthia gordoniana Poelln.
• Haworthia obtusa var. gordoniana (Poelln.) Uitewaal
• Haworthia pilifera var. gordoniana (Poelln.) Poelln.

• Haworthia cooperi var. leightonii (G.G.Sm.) M.B.Bayer
• Haworthia leightonii G.G.Sm.

• Haworthia cooperi var. pilifera (Baker) M.B.Bayer
• Catevala pilifera (Baker) Kuntze
• Haworthia cooperi f. pilifera (Baker) Pilbeam
• Haworthia obtusa var. pilifera (Baker) Uitewaal
• Haworthia pilifera Baker
• Haworthia pilifera f. acuminata Poelln.
• Haworthia obtusa f. acuminata (Poelln.) Uitewaal

• Haworthia cooperi var. venusta (C.L.Scott) M.B.Bayer
• Haworthia venusta C.L.Scott

Description: Strange spreading stemless plant that looks like a small grape cluster and makes fat little colonies, up to 7,5 cm in diameter.
Leaves: 20 to 25 per rosette, succulent soft and glassy (almost transparent) round-tipped somewhat spherical with lovely blue-green translucent-patterns, leaves become reddish with too much sun or not enough water.

Notes: Fenestrate leaves: This plant is a choice example of the window-leaf ( fenestrate leaf) adaptation found in many Haworthias, Mesembreanthemums and Peperomias, the translucent 'glassy' windowed apices allow light into the internal plant body rich in chlorophyll-bearing layers of cells, thereby providing a much larger assimilation area.
The windows greatly increase the photosynthesizing area by allowing light into the centres of leaves and at the same time avoiding water loss.

Bibliography: Major references and further lectures
1) Gordon D. Rowley “The illustrated encyclopedia of succulents” Crown Publishers, 01/Aug/1978
2) Doreen Court “Succulent Flora of Southern Africa” CRC Press, 01/Jun/2000
3) Urs Eggli “Illustrated Handbook of Succulent Plants: Monocotyledons” Springer, 2001
4) Charles L. Scott “The genus Haworthia (Liliaceae): a taxonomic revision” Aloe Books, 1985
5) Stuart Max Walters “The European Garden Flora: Pteridophyta, Gymbospermae, Angiospermae-Monocotyledons” Cambridge University Press, 1984
6) M. B. Bayer “The new Haworthia handbook” National Botanic Gardens of South Africa, 1982
7) John Pilbeam “Haworthia and Astroloba: A Collector's Guide” B. T. Batsford Limited, 1983
8) Bruce Bayer “Haworthia revisited: a revision of the genus” Umdaus Press, 1999
9) Ernst Van Jaarsveld, Ben-Erik Van Wyk, Gideon Smith “Succulents of South Africa: A Guide to the Regional Diversity” Tafelberg Publishers, Limited, 01/Jul/2000
10) ames D. Mauseth “Botany: An Introduction to Plant Biology” Jones & Bartlett Publishers, 2014
11) Charles L. Scott “The Genus Haworthia (Liliaceae): A Taxonomic Revision” Aloe Books, 1985
12) Noel Urton “Plants of the Swartkops valley bushveld” Zwartkops Trust, 1993
13) Manning, J.C., Boatwright, J.S., Daru, B.H., Maurin, O. and Van der Bank, M. “A molecular phylogeny and generic classification of Asphodelaceae subfamily Alooideae: A final resolution of the prickly issue of polyphyly in the Alooids?” Systematic Botany 39(1):55-74. 2014
14) von Staden, L., Klopper, R. & Manning, J.C. 2014. Haworthia cooperi Baker. “National Assessment: Red List of South African Plants” version 2014.1. Accessed on 2014/06/10
15) J. G. Baker “Flora Capensis” page 253 1897
16) Bayer, M.B and van Jaarsveld, E. 2001. “Haworthia. in Illustrated Handbook of Succulent Plants: Monocotyledons.” Springer, Berlin.
17) Bayer, M.B. 1999. “Haworthia Revisited: A revision of the genus.” Umdaus Press, Hatfield.
18) Bayer, M.B. and Manning, J.C. “The Haworthia nomenclator: A list of accepted species with some guidelines for infraspecific names.” Haworthia Update 7(4):30-40.2012

Cultivation and Propagation: There's no difference in cultivation from usual plants of this type. Though it grows more slowly.
Exposure: Needs light shade to shade.
Watering needs: Regular water (They enjoy a little water during winter period too) but do not overwater as they will most likely wind up with root rot, and do not water again until dry!
Hardiness: Hardy to to -5°C (or less if dry).
Propagation: Offsets (New plants are freely produced basally between the leaves)