Lithops - Au Cactus Francophone

B. aRubRae. Window without red dots or lines.
170
1. Miniature windows present, embedded in window and level with window surface.
(a) Upper surface with many blue, purple to brown dendritic markings
L. pseudotruncatella
(b) Upper surface with no dendritic markings . . . . . . . . . . . . . . L. terricolor
2. Miniature windows absent.
(a) Corner of window near the fissure triangular.
(i) Window open, clear, obconic . . . . . . . . . . . . . . . . . . . . . . . L. optica
(ii) Window with islands, oblique-convex . . . . . . . . . . . . . . L. Helmuti
(b) Window more or less round, flat convex, no triangle near fissure.
(i) Window covered by an opaque covering and in this covering
small circular openings, whereby the underlying transparent
window is visible.
x. Upper surface definitely convex, body relatively
small . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . L. Franciscii
xx. Upper surface flat, body relatively large.
o. Upper surface rust-brown . . . . . . . . . . . . . . . L. Lesliei
oo. Upper surface grey-white . . . . . . . . . . . . . . . L. Venteri
(ii) Window without circular openings, window open or slightly
covered or transparent part between islands visible.
x. Transparent window green or greenish, never otherwise
coloured.
o. Window always open, inner margin straight,
not denticulate . . . . . . . . . . . . . . . . . . . . . . L. olivacea
oo. Window mostly with islands or with reticulation,
sometimes open, inner margin denticulated.
p. Window covered by delicate misty
covering.
s. Window flat, in later stage oblique
convex, body relatively small,
flower yellow . . . . . . . . . . . . . . . . L. divergens
ss. Window convex or slightly so,
body large, flower white . . . . . . L. marmorata
pp. Window with many islands or rough
reticulation (fine sometimes L. Herrei) or
sometimes open.
s. Window with irregular, rough,
laciniated, elevated islands . . . . . . . . . L. bella
ss. Window with delicate reticulation
or islands practically level with
surface or window open.
v. Window with delicate reticulation
or open, body large,
flower not as big as body. . L. Herrei
vv. Window with small islands,
small body, flower much
bigger than body . . . . . . . . . . . . L. Geyeri