BY J. H. MAIDEN AND R. T. BAKER. 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 laminye; "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 

 I of an inch long including the decurrent parib, which equals 

 about half its entire length, woolly tomentose underneath, smooth 

 and shining above, rarely with any asperities, obtuse or with a 

 recurved point. 



Flower heads numerous, larger than those of H. 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. 



