Index:



L. schwantesii subsp. schwantesii var. schwantesii
L. schwantesii subsp. schwantesii var. marthae
L. schwantesii subsp. schwantesii var. rugosa
L. schwantesii subsp. schwantesii var. urikosensis
L. schwantesii subsp. gebseri



Lithops schwantesii Dint. (1928)


subsp. schwantesii


var. schwantesii



       
       

Origin:


Collected by Ernst J. Rusch in August 1926, and named for Professor M.H. Gustav Schwantes of Kiel, Germany, who contributed enormously to the study of Lithops and other Mesembryanthemaceae.

Distribution:


Namibia, in a large north-south strip about 80 km wide, N of 27° S latitude and W of 17° E longitude, tapering off northwestwards to a point about 100 km W of Maltahöhe, and with a major concentration to the SW, W and NNW of Helmeringhausen TL Barbi, W of Helmeringhausen.
Stone: Sandstone; sandstone and quartzite; ferruginous quartzite; quartzite and gneiss; granitic gneiss; gneiss and pegmatite; calcrete and quartzite; calcrete and limestone. Colours brown, red-brown, pinkish brown, red-stained white, greyish brown, greyish green, grey-white.

Description:


Mainly characterized by the bold rubrications and light coloured marginal bands.
Profile truncate; flat to slightly convex; fissure shallow, 4-8 mm; lobes conjunct.
Face flush, mostly elliptic-reniform, lobes equal-unequal; opaque to transluscent; smooth to rugose.
Margins often prominently banded, but usually slightly fuzzy and not clearly defined; somewhat irregular with indentations and intrusive channels and rubrications.
Windows occasionally absent, when the face is almost entirely opaque and the channels are reduced to narrow grooves; usually ± occluded, sometimes ± completely open.
Channels irregular, usually fairly broad, occasionally very narrow, no more than slightly impressed grooves or furrows accommodating the rubrications.
Islands few to many, small to large, usually indistinct and not well-defined; sometimes manifest as clearly defined areas ± enclosed by grooves.
Rubrications rarely absent; usually an entire or broken network of bold lines, fairly regular, occasionally in a honeycomb pattern; sometimes reduced to a number of isolated short lines, dashes and dots.
Dusky dots sometimes clearly visible, occasionally not even with a lens; usually fairly numerous, scattered irregularly over the whole face, opaque and transluscent areas alike.
Colours: Margins usually distinctly banded in one or other shade of opaque yellowish, pinkish, orange, brownish or reddish grey. Islands usually as for the margins but indistinct and sometimes a little paler. Windows and channels obscurely to pellucidly transluscent grey-green, often with red, orange-brown, purple-brown, greyish purple, grey-brown, blue or yellowish tints. Rubrications dull to bright blood-red or purplish red. Dusky dots dark dull grey-green. Shoulders opaque milky bluish grey, sometimes yellowish or reddish grey.
Size: Small to large, facial diameters up to 40 X 30 mm, mostly about 25 x 20 mm. Number of heads up to 15 or more, mostly 1-3.

Flowers:


Yellow, often with longish pedicels, medium to large, up to 36 mm Ø, mostly 25-30 mm Ø.
Seed capsules mostly 5-merous (94%), otherwise 6-merous (4%), or 4-merous (2%). Profile boat-shaped, top ± flat. Face elliptic to broadly elliptic, up to 10 X 8,5 mm, mostly about 8 X 7 mm.
Seeds light yellow-brown; smooth to rugose 1, flecked.

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Lithops schwantesii Dint. (1928)


subsp. schwantesii


var. marthae (Loesch & Tisch.) D.T. Cole (1936)



 

Origin:


Collected by Franz S. Erni in 1931, and named for his wife, Martha.

Distribution:


Namibia, S and SE of Aus, in an area to the NW, N, NE and E of Witputs TL Pockenbank (C249).
Stone: Quartzite and gneiss; granitic gravel; calcrete and limestone. Colours light to dark brown, white, red-stained white, grey-white, grey.

Description:


Differs from the type in its generally more greyish-green colour, open windows and fewer rubrications.
Profile truncate; flat to very slightly convex; fissure shallow, 4-8 mm; lobes conjunct.
Face flush, elliptic-reniform, lobes equal-unequal; obscurely transluscent; smooth to very slightly rugose.
Margins mostly fairly regular and prominently banded but rather fuzzy and not distinctly outlined.
Windows mostly open, occasionally partly occluded.
Channels absent, or evident only as very slightly impressed grooves which accommodate the rubrications.
Islands mostly absent, occasionally manifest as a few obscure opaque flecks.
Rubrications often absent or so obscure as to be visible only with a lens; otherwise, usually a number of slender to bold branched lines, hooks and/or dots, sometimes sparse, occasionally linked into a coarse broken network.
Dusky dots usually absent, otherwise rather sparse, seldom visible without a lens.
Colours: Margins obscurely banded in various shades of opaque pale grey, beige or cream, or light grey tinted with pink, yellow-brown or green. Windows various shades of obscurely transluscent dull greenish or bluish grey, occasionally with a slightly reddish tint. Rubrications dull blood-red to purplish red. Dusky dots dull grey-green. Shoulders opaque pale grey, or grey tinged with blue, green, pink or yellow.
Size: Small to medium, facial diameters up to 26 X 18 mm, mostly about 20 x 15 mm. Number of heads up to 18 or more, mostly 2-6.

Flowers:


Yellow, small to medium, up to 35 mm Ø, mostly 20-30 mm Ø.
Seed capsules mostly 5-merous (92%), otherwise 6-merous (6%) or 4-merous (2%). Profile boat-shaped, top flat to slightly convex. Face elliptic to broadly elliptic, up to 8 X 6,5 mm, mostly about 7 X 6 mm.
Seeds light yellow-brown; smooth to rugose 1, flecked.

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Lithops schwantesii Dint. (1928)


subsp. schwantesii


var. rugosa (Dint.) H.W. de Boer & B.K. Boom (1928)



 

Origin:


Collected by Ernst J. Rusch in August 1926. Latin rugosa 'rugose, wrinkled'.

Distribution:


Namibia, in a small area to the WNW of Helmeringhausen. TL Aubores (C247).
Stone: Calcrete and sandstone. Colours grey-white, pinkish grey-white, some brown.

Description:


Differs from the type variety mainly in colour, occasional plants from colonies of which may not be clearly distinguishable. It is interesting to note that the colour of this variety has some similarity to that of L. pseudotruncatella var. elisabethiae, which bears a similarly very close relationship to its type variety.
Profile truncate; flat to slightly convex; fissure shallow, 5-10 mm; lobes conjunct.
Face flush, elliptic-reniform, lobes equal-unequal; mostly opaque; somewhat rugose.
Margins usually not clearly distinguishable.
Windows absent, the face usually opaque, but occasionally barely discernible as very obscurely transluscent.
Channels mostly manifest as a system of impressed valley-like grooves, narrow to broad, fairly regularly branched.
Islands manifest as slightly humped areas ± enclosed by channels.
Rubrications set in the grooves, a number of branched lines, hooks, dashes and dots, occasionally forming a ± entire network, more often broken.
Dusky dots few to many, scattered irregularly over the whole face; sometimes fairly obvious, usually rather obscure and visible only with a lens; sometimes concentrated along the valleys and producing a semblance of channels.
Colours: Face (margins & islands) various shades of opaque milky pink, mauve or bluish pink, the margins sometimes obscurely banded in a slightly paler hue. Channels dull greenish or bluish grey. Rubrications dull purple-red. Dusky dots dull grey-green. Shoulders as for the face or duller bluish grey.
Size: Medium to large, facial diameters up to 38 X 28 mm, mostly about 30 x 20 mm. Number of heads up to 12, mostly 2-3.

Flowers:


Yellow, small to medium, up to 35 mm Ø, mostly 20-30 mm Ø.
Seed capsules mostly 5-merous (97%), otherwise 4-merous (2%) or 6-merous (1%). Profile boat-shaped, top ± flat. Face elliptic, up to 8 X 6,5 mm, mostly about 6,5 X 5,5 mm.
Seeds yellow-brown; smooth to rugose 1.

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Lithops schwantesii Dint. (1928)


subsp. schwantesii


var. urikosensis (Dint.) H.W. de Boer & B.K. Boom (1928)



       

Note: This variety includes those published or known hitherto as *christinae, *kunjasensis and *nutupsdriftensis.

Origin:


Collected by Ernst J, Rusch in August 1926. at Urikos.

Distribution:


Namibia, in a triangular area to the W and NW of Maltahöhe, but with localities also near Duwisib, Helmeringhausen and Bethanien. TL Urikos (C105), near the most northwesterly point of the range.
Stone: Calcrete and fine-grained sandstone; calcrete and dolomite with some quartzite; calcrete and ferruginous quartzite; ferruginous shale and quartzite. Colours grey-white, grey, with some brown, red-brown, black.

Description:


A distinctive colour variant, fairly easy to identify. It is intriguing to note that plants from the localities near Urikos (most northerly), Bethanien (most southerly) and Duwisib (almost in the middle), bear the closest resemblance to one another, and in fact are not distinguishable at all; whereas those from other areas are sometimes identifiable.
Profile truncate; flat to slightly convex; fissure fairly deep, 6-12 mm; lobes conjunct.
Face flush, elliptic-reniform, lobes equal-unequal; opaque; somewhat rugose.
Margins sometimes obscurely banded but usually not clearly distinguishable, fairly regular.
Windows absent, the face opaque, or only occasionally very obscurely transluscent.
Channels usually reduced to a fine or coarse network of shallow valleys or narrow grooves which barely accommodate the rubrications.
Islands manifest only as humps ± enclosed by valleys or grooves.
Rubrications in the channels, a network of branched lines, dashes, hooks and/or dots, sometimes entire, sometimes broken and obscure.
Dusky dots usually absent or very obscure and visible only with a lens, otherwise relatively sparsely scattered over the whole face.
Colours: Face (margins & islands) various shades of opaque milky bluish, greenish or yellowish grey, occasionally with pink or buff tints; the margins sometimes obscurely banded in a slightly lighter or deeper hue. Channels often completely taken up by the rubrications, otherwise obscurely transluscent bluish grey-green. Rubrications dark brownish or purplish red. Dusky dots dull bluish grey-green. Shoulders milky bluish grey.
Size: Medium to large, facial diameters up to 43 X 27 mm, mostly about 30 x 20 mm. Number of heads up to 15 or more, mostly 2-5.

Flowers:


Yellow, small to medium, up to 35 mm Ø, mostly 20-30 mm Ø.
Seed capsules mostly 5-merous (93%), otherwise 6-merous (5%), 7-merous (1%) or 4-merous (1%). Profile boat-shaped, top ± flat to slightly convex. Face elliptic to broadly elliptic, up to 9 X 7,5 mm, mostly about 7,5 X 6 mm.
Seeds light yellow-brown to yellow-brown; smooth to rugose 1, flecked.

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Lithops schwantesii Dint. (1928)


subsp. gebseri (H.W. de Boer) D.T. Cole (1964)



   

Origin:


Collected by Walter Gebser of Maltahöhe in January 1960, and named for him.

Distribution:


Namibia, in a small area to the N and NE of Helmeringhausen, and to the E of the range of subsp. schwantesii. TL Estorffdank (C165).
Stone: Dark brown ferruginous sandstone.

Description:


Distinguished from subsp. schwantesii by its finer network of grooves and rubrications, and its purplish-brown colour; somewhat reminiscent in some respects of L. fulviceps, whose range is some 300 km away, and also of the much more distant L. hookeri.
Profile truncate; flat to slightly convex; fissure shallow, 5-10 mm; lobes conjunct.
Face flush, elliptic-reniform, lobes equal-unequal; opaque to very obscurely transluscent; slightly rugose.
Margins usually not clearly distinguishable, with numerous small indentations and intrusive rubrications.
Windows absent, the face usually opaque but occasionally very obscurely transluscent.
Channels usually reduced to a fine network of slightly impressed grooves or furrows, sometimes in a honeycomb pattern, which accommodate the rubrications.
Islands manifest as small opaque areas, mostly fairly regular in shape, ± enclosed by grooves.
Rubrications in the grooves, occasionally indistinct, mostly a broken network of fine branched lines, dashes, hooks and/or dots which mostly fill the channels.
Dusky dots usually not visible without a lens, numerous, scattered irregularly over the whole face.
Colours: Face (margins & islands) various shades of opaque to very obscurely transluscent purplish brown, grey-brown, reddish grey or yellowish grey, the margins sometimes obscurely banded in a slightly deeper hue. Channels often taken up completely by the rubrications, otherwise obscure dark greenish or bluish grey. Rubrications blood-red, purplish red, orange-brown. Dusky dots, dull greenish grey. Shoulders various shades of dark bluish grey.
Size: Medium to large, facial diameters up to 40 X 28 mm, mostly about 30 x 25 mm. Number of heads up to 6, mostly 2-3.

Flowers:


Yellow, medium, up to 35 mm Ø, mostly 25-30 mm Ø.
Seed capsules mostly 5-merous (88%), otherwise 6-merous (11%), or 4-merous (1%). Profile boat-shaped, top flat to slightly convex. Face broadly elliptic, up to 9,5 X 7,5 mm, mostly about 8,5 X 7 mm.
Seeds yellow-brown to light brown; rugose 2, flecked.

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


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