Index:



L. vallis-mariae
acf 'Valley Girl'



Lithops vallis-mariae (Dint. & Schwant.) N.E. Br. (1925)



       

Origin:


Collected by Mrs Angela Hanina Beetz in 1923, on her father's farm Marienthal, i.e. 'Mariadale', hence vallis-mariae 'valley of Maria'.

Distribution:


Namibia, in a large quadrangular area to the N and E of Keetmanshoop, and bounded approximately by Berseba, a point some 30 km NW of Mariental, Stampriet, and a point some 40 km N of Aroab. TL near Mariental (C281).
Stone: Rounded quartzites and sandstone; calcrete with some quartzite; also occurs in a pan with very few sandstone and quartzite pebbles. Colours yellow-white, yellow-brown, grey-white, some brown, reddish brown, white, grey, black.

Description:


Characterized by its truncate profile, near-white colour and minutely wrinkled top surface; a uniform and easily identifiable species.
Profile truncate, flat to slightly convex; fissure shallow, 5-10 mm; lobes conjunct.
Face flush; mostly ± reniform; lobes ± equal to distinctly unequal; opaque, the whole face very minutely wrinkled or extensively dotted with pin-pricks sometimes visible to the naked eye, sometimes only with a lens; slightly rugose.
Margins and windows absent or very obscure.
Islands manifest only as areas ± enclosed by channels.
Channels often absent, otherwise a number of impressed grooves in the form of dots, hooks and short lines, up to 1 mm wide but usually less than 0,5 mm, the ends of the lines and the dots sometimes quite deeply pitted; sometimes the grooves and pits are very shallow and appear as a faint, barely impressed reticulation, or as a series of stitch-like marks around the outer margins; occasionally they are more extensive and constitute a distinctly impressed network over the whole face.
Rubrications absent.
Dusky dots not visible.
Colours: Face opaque pale grey-white, or grey-white tinged with creamy yellow, green, beige or pink; margins occasionally slightly more yellow or pink than the rest of the face. Channels opaque to very obscurely transluscent grey, bluish grey, pinkish grey or pinkish brown. Shoulders slightly lighter or greyer than the face.
Size: Medium to large, facial diameters up to 40 X 30 mm, mostly about 30 x 23 mm. Number of heads up to 10 or more, mostly 2-4.

Flowers:


Straw yellow, occasionally orange-yellow, sometimes tinged with bronze or pink; small to medium, up to 30 mm Ø, mostly 20-25 mm Ø; often exceeded in size by the sepals which project beyond the ends of the petals by 3-5 mm; and often with long pedicels raising the flowers as much as 25 mm above the face of the plant.
Seed capsules usually 5-merous (91%), otherwise mainly 6-merous (4%) or 4-merous (5%). Profile boat-shaped, flat, occasionally slightly convex. Face broadly elliptic, up to 10,5 X 8 mm, mostly about 8 X 6,5 mm.
Seeds light yellow-brown to yellow-brown; smooth to rugose 1, flecked.

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Lithops vallis-mariae (Dint. & Schwant.) N.E. Br. (1925)


acf 'Valley Girl' (1999)



Description:


Differs from the type in having white flowers.

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


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