Accepted Scientific Name: Lithops otzeniana
Kakteenkunde (8) 123-127, 1937
Lithops otzeniana C128 TL: 35 km NNW of Loeriesfontein, South Africa Photo by: Valentino Vallicelli
Origin and Habitat: Type Locality 35 km North-North-West of Loeriesfontein, South Africa.
Synonyms:
See all synonyms of Lithops otzeniana
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Accepted name in llifle Database:Lithops otzeniana NelKakteenkunde (8) 123-127, 1937Synonymy: 4
Cultivars
(2):
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Description: Lithops otzenianaSN|13266]]SN|13266]] usually forms small groups with 2-5 heads but occasionally with up to 25 heads (especially in cultivation). It is a very peculiar species easily distinguished for its translucent greenish-olive top with lighter raised, scalloped islands around the edges.
Cole numbers: C128, C280, C350
Bodies (paired leaves): Up to 3 cm hight and 20-30 mm x 15-20 mm wide, cordate truncate in profile, with a relative deep fissure and lobes half-moon shaped more or less divergent. Face: More or less elliptical smooth to moderately rugose and more or less convex. Margin: Very distinct with elevated teeth-like rounded peninsulas.
Islands: Usually few but sometime numerous mostly included among the margins peninsulas. Colour light grey with shades of pink, cream, green or blue. Windows: Mostly occluded with broad to narrow channel. Colour: Greenyish, olive-green or bluish green, translucent sometime with white or pink shadows. Rubrication: Not present.
Flowers: Yellow with a white throat, about 1,5-3,5 cm diameter.
Blooming season: Early autumn.
Fruits: Mostly 5-loculed capsules.
Subspecies, varieties, forms and cultivars of plants belonging to the Lithops otzeniana group
Notes: Lithops are partly subterranean, with only the clear 'window' in each leaf tip exposed above soil. A type of optical system exists whereby a layer of apical tissue rich in calcium oxalate crystals acts as a filter to intense sunlight before it reaches the thin chlorophyllous layer below. They are also called mimicry plants as they show a striking similarity to their background rocks and are difficult to detect when not in flower. These are the commonly known as pebble plants or living stones; each species is associated with one particular type of rock formation and occurs nowhere else. Its soil-embedded, subterranean growth form also reduces the need for chemical defences against herbivores.
Bibliography: Major refences and further lectures
1) Heidrun E. K. Hartmann (2002) “Aizoaceae F – Z” Springer
2) Achim Hecktheuer (2008) “Mesembs, mehr als nur Lithops” Books on Demand GmbH Norderstedt. ISBN-13 978-3-8370-1724-3
3) Desmond T. Cole & Naureen A. Cole, Uwe Beyer, Yves Delange (2008) “Les Lithops” SUCCULENTES Spécial 2008 AIAPS (now Terra seca). ISSN 0258-5359
4) Desmond T. Cole & Naureen A. Cole (2005) “LITHOPS Flowering Stones” Cactus & Co. Libri. ISBN 88-900511-7-5 ISBN-13 978-88-900511-7-3
5) Yasuhiko Shimada (2001) “The Genus Lithops” Dobun Shoin. ISBN 4-8103-4066-X
6) Rudolf Heine (1986) “Lithops - Lebende Steine” Neumann Verlag. ISBN 3-7402-0000-6; ISBN-13 978-3-7402-0000-8
7) Bernd Schlösser (2000) “Lithops – Lebende Steine” Praktische Anleitung für die Zimmerkultur. BussinessPoint MEDIA. ISBN 3-934945-01-5; ISBN-13 978-3-934945-01-2
8) Steven A. Hammer (1999) “Lithops – Treasures of the veld” British Cactus and Succulent Society. ISBN 0-902-099-64-7; ISBN-13 978-0-902099-64-7
9) Desmond T. Cole (1988) “Lithops – Flowering Stones” Acorn Books CC. ISBN 0-620-09678-0; ISBN-13 978-0-620-09678-2
10)David L. Sprechman (1970) “Lithops” Associated University Presses, Inc. SBN 8386-6902-6
11) Gert Cornelius Nel (1946) “Lithops” Hortors Limited, South Africa
13) Edgar Lamb (1978) "The illustrated reference on cacti and other succulents" Blandford Press.
14) Mesa garden seed list. Belen. New mexico. USA
15) Dieter J. Von Willert “Life strategies of succulents in deserts: with special reference to the Namib desert” CUP Archive, 1992
Lithops otzeniana C128 TL: 35 km NNW of Loeriesfontein, South Africa Photo by: Valentino Vallicelli Lithops otzeniana C128 TL: 35 km NNW of Loeriesfontein, South Africa Photo by: Valentino Vallicelli Cultivation and Propagation: Need an open mineral, fast draining mix and the maximum amount of light you are able to give them. The basic cultivation routine is: Stop watering after flowering. Start watering after the old leaves completely dry. (Usually late March or Early April) Water freely during the growing season, soak the compost fully but allow it to dry out between waterings, no water when cold. Some growers fertilize frequently, some hardly ever. Keep them dry during the winter. Nearly all problems occur as a result of overwatering and poor ventilation especially when weather conditions are dull and cool or very humid. This plant is best for a well lit area (Bright shade to full sun). But don't be afraid even the best growers have plants that mysteriously dry up, or leave during the night.
Remarks: After flowering in the autumn and extending through winter season the plant doesn’t need watering, but they will still be growing, the new bodies will be increasing in size extracting water from the outer succulent leaves, allowing them to shrivel away. In fact the plant in this time extracts water and nutrient stored in the outer succulent leaves, allowing them to dehydrate relocating the water to the rest of the plant and to the new leaves that form during this period until the old leaves are reduced to nothing more than "thin papery shells".