194 A. J. EWART, JEAN WHITE AND J. R. TOVEY. 
the elongated leaves of R. crassifolia are spiny, and with 
some of the spiny specimens it is a matter of choice as to 
whether they are placed in one species or the other. There 
can be no doubt that in this case two species have been 
recognised as distinct before the intermediate forms 
between them have become extinct, and that R. spinescens 
must be classed as a variety of R. crassifolia. 
Salicornia Donaldsoni, Ewart and White, .sp. (Salsolacez). 
After F. M. Donaldson. 
Shrub much branched with greyish coloured woody stems, 
dotted at intervals with dark structures which may be 
glandular. The segments of the stem are conspicuous and 
concave above, with a prominent border and opposite 
free projections arranged in a decussate manner; the 
length of each free projection is about1mm. The fertile 
segments are shorter than the others, the length of the 
former being about 3 mm. and of the latter about 8 mm. 
In most of the flowering spikes examined there were two 
whorls of flowers open at the same time, but occasionally 
there were three or even four. The flowers of the succes- 
sive whorls are alternately superimposed. On the concave, 
upper surface on each side of each fertile spike, there are 
two flowers almost wholly immersed in the concavity of 
the segment, though asa rule the upper parts of the anthers 
and styles are exserted. Hach flower is surrounded by a 
membranous perianth which is attached below to the inside 
wall of the expanded part of the segment, and is divided 
above into generally about six short pointed processes. 
Flowers hermaphrodite. Inside the perianth of each flower 
are three stamens, the filaments of which measure from ‘5 
to 1 mm. in length and are free from each other. The 
anthers are conspicuous and two lobed, dehiscing loculicid- 
ally, and measure 1°5 to 2 mm, in length. The three 
‘brownish, flattened styles are 3 mm., and have both surfaces 
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