178 
Lawson stated that in the blue (or purplish blue) part of the flower, 
the colouring matter entirely consists of spherical granules of an 
intense blue or bluish purple colour, with occasionally cells contain- 
ing similar shaped granules of bright crimson. All the granules of 
any one cell appear to be constantly of the same colour. In the yel- 
low part of the flower, the colouring matter appears in a very different 
form. Instead of spherical granules, we have slender filaments, 
which are more or less spirally twisted and rolled up in various ways 
in the cell, resembling in their twisting the more delicate spiral fibres 
in the external cells of the roots of epiphytal Orchids; but they are 
in many cases short, and form small round coils, giving the outline of 
globular bodies, which likewise, however, occasionally occur. While 
red and blue colouring matters usually occur in the vegetable king- 
dom diffused in the cell-sap, we find them both in Strelitzia in 
a globular form. Although deceptive appearances often presented 
themselves, Mr. Lawson felt inclined to believe from the examination 
of numerous specimens, that diffused colour did not at all occur in the 
flowers of Strelitzia. When the flower has attained its maturity, 
however, the cells are often so completely filled with the deep blue 
granules that they appear as a dense mass of blue, apparently homo- 
geneous, matter in the interior of the cell. The flower should there- 
fore be examined in the young state, not only before it has expanded, 
but long before the spathe has opened to expose it to the action 
of the light; even then the colouring of the flower will be found to 
have far advanced, but the cells not so completely filled with the blue 
globular granules as to disguise their character, and they are therefore 
distinctly seen. The cells containing the yellow filaments are gene- 
rally of larger size and more elongated in form than those containing 
blue or red globules. The flowers examined by Mr. Lawson had 
been obtained (through the kindness of Mr. Evans) from a large speci- 
men in the Experimental Garden. 
Mr. G. Lawson exhibited specimens of Hypnum salebrosum, col- 
lected on an old wall at Baldovan, near Dundee, in March last, 
by Messrs. Ogilvie & Hutton. He stated that the plant had not 
previously been known in the county of Forfar since Drummond’s 
time. 
Polypodium alpestre at Clova. 
Professor Balfour stated that Mr. Croall, of Montrose, in a recent 
account of a trip to Clova, published in Hooker’s ‘ Kew Miscellany,’ 
had remarked :—“ Polypodium alpestre at the head of the glen grows 
oe goa hoaguag 
