JUBULA S17 
MARCHESINIA S. F. Gray. 
Phragmicoma Dum. 
MARCHESINIA MACKAII (Hook.) Gray 
A rare species only known from a few localities along 
the west coast from Wigtown to West Inverness and Skye, 
and nearly always close to the sea-shore. It is a southern 
plant, probably more frequent in England than with us, 
and occurring there also in inland localities. Has only been 
found on rocks in Scotland, and preferably limestone, though 
occurring also on schist and basalt. It forms thin patches 
on rather dry and frequently exposed rocks, and is nearly 
black or olive-green in colour, but is occasionally reddish- 
brown or reddish-yellow. Perianths and male bracts are 
common ; neither fully developed fruit nor antheridia have 
been noted in Scotland. 
S.W. LowLanps.— Wigtown: Mull of Galloway, 1844. 
(Grev. Herb.) ; nr. Glenluce, 1846 (Ed. Herb.); Knock Bay 
(M‘And.); nr. Portpatrick, per. (Macv.). 
W. HicHianps.—Clyde Isles: Lamlash, on rocks on sea- 
shore (M‘And.). W. Inverness: Moidart, on schistose rocks 
in a few places, and in quantity on rocks bordering a sand- 
dune, per. (Macv.). 
INNER HeEpRIDES.—S. Inner Hebrides: Ard, Port Ellen, 
Islay, on damp rock, per. (Gilm.). Mid Inner Hebrides: 
Tobermory, rock on sea-shore, per. (Kenn.); do., in two 
ravines, per. (Macv.). WV. Inner Hebrides: Nr. Broadford 
on limestone rock, on sea-shore, per. (Macv.). 
? 
JUBULA Dum. 
JUBULA HUTCHINSLE (Hook.) Dum. 
This rare species has only been found in a few localities 
on the west coast, near the shore, on schistose and sandstone 
rocks, usually in caves but also in ravines. It is more 
frequent in Arran than elsewhere. Forms extensive dark- 
green patches on very wet rocks and in caves. Although 
a fairly large plant, is difficult to detect when in thin 
layers, but usually some stems are found hanging from 
