They are spirally arranged, persistent, and usually have parallel venation.
2.
It has linear leaves with parallel venation and flowers in parts of three.
3.
The leaves are elliptical and blunt, with white glaucous undersurface which displays parallel venation.
4.
Leaves : fleshy and mucilaginous arranged in a basal rosette, alternate and spiral, simple, margin entire, with parallel venation, sheathing at the base, without stipules and hair simple.
5.
However the " Labourdonnaisia " species have parallel venation on their leaves, while the " Sideroxylon " species have densely netted leaf-venation and strong midribs under their leaves.
6.
However the " Labourdonnaisia " trees have parallel venation on their leaves-while the " Sideroxylon " trees have densely-netted venation and a strong midrib under their leaves.
7.
"Gymnostachys " is kept to its own subfamily "'Gymnostachydoideae "'due to its unique characteristics that include an unusually structured flowering shoot and linear leaves with parallel venation.
8.
The lanceolate leaves are simple, spirally arranged, 5 20 cm long and 1.5 5 cm broad at the base, with a parallel venation and entire margin; they grow in tight whorls and are a uniform dark green.
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