OF FILAMENTOUS, FRUTICULOSE, AND FOLIACEOUS LICHENS. 145 
1. Small or ordinary form: Huamantonge, and on the Pampas of the Cordil- 
lera, South America; Port Louis, Dr Hooker; Franxuin’s first voyage ; Port 
Bower; the mountains of Canlochan, Clova, GARDINER, 1844; hill above the 
Corrie of Clova, GARDINNR, 1843; Ben Aven, Braemar, spreading over Cetraria 
aculeata and Trichostomum lanuginosum, GARDINER of Dundee. 
2. Short, turgid form, var. ¢aurica of authors: Bomasas, Garkmial, on the 
Himalaya, 16,000 feet high, ex. Herb. Stracnry and WINTERBOTTOM; LEHON; 
Spruce’s “Lichenes Pyrenezi;’ British North America; Melville Island, Sir E. 
Parry; Hartz Mountains, Dr Noupen ; Ben Lawers; Mael Graedha, 1810, coll. 
by Borrer. 
FAMILY V. BzomycEe. 
GENUS I. Baomycss, Pers. 
In this genus the spermogones are with great difficulty visible, and are sel- 
dom to be met with. I have seen what I regard as the spermogones—for I have 
not been able perfectly to satisfy myself—only in a single instance, in B. placo- 
phyllus. There they occur on the horizontal or fiat foliose thallus, as punctiform, 
immersed, black or brown bodies, somewhat irregular in form. The spermatia 
are very minute, rod-shaped, or oval; the sterigmata very narrow. delicate, and 
consisting of numerous short cells or articulations. In respect to the size of these 
individual articulations, and their general thickness, the arthrosterigmata of 
Beomyces are intermediate between those of Collema or Sticta, and those of 
Parmelia, as, indeed, I have already pointed out under the head of Thamnolia 
~ vermicularis. 
Sprcius 1. B. placophyllus, Ach., 
Which grows in northern Europe, and northern America. 
Specimen 1.—Near Blair Atholl, 1810; Borrer, in Herb. Hooker, Kew. The 
horizontal thallus is studded over with minute, black, punctiform, or irregular 
bodies,—immersed in the thalline tissue,—which appear to be its spermogones, 
but in which I could find no free spermatia nor distinct sterigmata, so that I am 
in doubt as to their nature. Here there is no fructification (apothecia). The 
thallus is parmelioid, thick, foliaceous, buff-coloured. 
SPECIES 2. B. roseus, Pers. 
The most familiar species of the genus, perhaps, which occurs in Europe, 
America, and New Zealand. Its arthrosterigmata are the most delicate known 
in lichens as to thickness, being only about z;th to ~octh broad. 
VOL. XXII. PART I. 2A 
