BY J. H. MAIDEN AND R. T. BA.KER. 
589 
It is easily recognised from P. canescens by its obtuse lamince 
and smaller involucre as well as by the shape of the leaves, and 
in being a much slender and taller plant, and almost glabrous. 
Of all the species in this genus it has the greatest superficial 
resemblance to P. Lessoni, and could easily be mistaken for that 
species, its chief characteristic difference being its much longer 
and decurrent linear-lanceolate leaves, rugose scarious laminae, and 
the presence of the basal bracts of the involucre. 
P. Siemssenia stands apart from it principally by its decurrent, 
smooth laminae; " not perceptibly barbellate pappus-bristles;" 
smaller non-decurrent stem leaves; absence of scarious scales on 
the peduncles and its shining bracts. 
Its specific name has reference to the colour of its stems. 
Helichrysum tesselatum, sp.nov. 
(Plate liii.). 
An erect shrub of several feet, often with thick stems which 
always retain the prominent decurrent lines of the leaves, the 
branches closely woolly tomentose. 
Leaves narrow-linear with recurved or revolute margins, about 
J of an inch long including the decurrent part, which equals 
about half its entire length, woolly tomentose underneath, smooth 
and shining above, rarety with any asperities, obtuse or with a 
recurved point. 
Flower heads numerous, larger than those of II. diosmifolium, 
in rather loose terminal corymbs, sometimes measuring 4 to 5 
inches. 
Flower heads straw-coloured on woolly white, stouter pedicels 
than the allied species, larger and less numerous than those of 
H. diosmifolium. Involucre hemispherical or ovoid-turbinate, 3 
lines in diameter, or a shade longer than broad, the bracts obtuse, 
concave, compact, straw-coloured, with spreading tips, the outer 
ones slightly woolly below the scarious tips. Florets about 35 to 
40, a few of the outer ones females. 
