Index:



L. comptonii var. comptonii
L. comptonii var. weberi



Lithops comptonii L. Bol. (1930)


var. comptonii



       

Origin:


Collected by Professor Robert Harold Compton, Directer of the Kirstenbosch Botanical Gardens, in October 1929 (NBG 1979/29), and named for him.

Distribution:


RSA: CP, in a small area NE of Ceres and N of Touwsrivier. TL 'Laingsburg, near Matjiesfontein', later corrected to 'near the farm Sterkfontein, north of the Bonteberg'.
Stone: Chert; ferruginous chert and calcrete. Colours yellow-brown, dark brown, grey, with some grey-white, white, black.

Description:


Relatively uniform, and distinguished by its mostly open windows and purplish-grey colour.
Profile truncate-cordate; top surface usually slightly convex, sometimes very slightly humped, occasionally ± flat; fissure fairly deep, 8-15 mm; lobes usually somewhat divergent.
Face flush or slightly elevated, elliptic-reniform; lobes equal-unequal; opaque + obscurely transluscent; smooth.
Margins distinct, usually finely dentate, sometimes irregularly sinuate with a few small peninsulas.
Windows sometimes occluded, but often ± completely open, sometimes with slender lines tailing off into the margins.
Channels irregular, broad to narrow.
Islands few to many, mostly fairly small, irregular, sometimes reduced to small smudge-like flecks.
Rubrications absent.
Dusky dots seldom visible even with a lens, then very obscurely, few to many.
Colours: Margins and islands various shades of opaque pinkish beige, light grey or pale greenish grey. Windows and channels various shades of obscurely transluscent slate grey, dark greenish grey or violet-grey. Dusky dots very obscure dark greyish green. Shoulders as for the margins or slightly darker or greyer. Inner faces of fissures generally as for the shoulders, often more pink at the bottom.
Size: Small to medium, facial diameters up to 35 X 23 mm, mostly about 25 X 17 mm. Number of heads up to 10 or more, mostly 2-4.

Flowers:


Yellow with white centre, small to medium, up to 30 mm Ø, mostly 20-25 mm Ø.
Seed capsules mostly 5-merous (97%), otherwise 6-merous (2%), or 4-merous (1%). Profile shallow boat-shaped, top flat to slightly convex. Face broadly elliptic to round, up to 9 X 8 mm, mostly about 7 X 6 mm.
Seeds yellow-brown; tuberculate 2, brown.

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Lithops comptonii L. Bol. (1930)


var. weberi (G.C. Nel) D.T. Cole (1940)



     

Origin:


Collected by Professor G.C. Nel in September 1939. Named for Mr ?? Weber of Calvinia, who provided Nel with information about the locality.

Distribution:


RSA: CP, in a small area between Calvinia and Ceres, and E of Clanwilliam. TL 'Calvinia-Ceres Karoo: In weathered pockets in limestone benches' (C126).
Stone: Calcrete (greyish white) with some black or brown quartzite.

Description:


Similar to var. comptonii, but with windows usually more occluded, the islands and peninsulas larger.
Profile truncate to slightly cordate; top surface mostly somewhat convex, occasionally very slightly humped, sometimes ± flat; fissure fairly deep, 8-13 mm; lobes conjunct to slightly divergent.
Face flush or slightly elevated, elliptic-reniform; lobes equal-unequal; opaque or occasionally very obscurely transluscent; smooth to slightly rugose.
Margins usually ± distinct but irregular,finely dentate or sinuate, with mostly small peninsulas.
Windows usually occluded, occasionally ± completely open.
Channels irregular, broad to narrow.
Islands usually distinct, few to many, small to large, fairly regular, sometimes slightly raised.
Rubrications absent.
Dusky dots not visible.
Colours: Margins and islands various shades of opaque grey or greyish pink or pale greenish, bluish or pinkish grey, the islands sometimes more deeply coloured than the margins. Windows and channels various shades of opaque or very obscurely transluscent greyish or bluish green or pinkish blue. Shoulders as for the margins, or slightly greyer.
Size: Small to medium, facial diameters up to 33 X 23 mm, mostly about 25 X 18 mm. Number of heads up to 10 or more, mostly 2-4.

Flowers:


Yellow with white centre, small to medium, up to 30 mm Ø, mostly 20-25 mm Ø.
Seed capsules mostly 5-merous (93%), otherwise 6-merous (7%). Profile shallow boat-shaped, top ± flat. Face broadly elliptic to round, up to 9 X 7,5 mm, mostly about 7,5 X 7 mm.
Seeds light-brown; tuberculate 2, brown.

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* Information from COLE, DESMOND T. and NAUREEN A., (2005) Lithops Flowering Stones, Cactus&Co. Libri


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