DISTRIBUTION OF THE SPECIES 
MARCHANTIALES 
RICCIACEA 
RICCIA L. 
Riccia GLAUCA L. 
WIDELY distributed from Dumfries to South Perth and 
West Inverness, but rare and only found in small quantity. 
It appears to be rather more frequent on the east side of 
the country than on the west, and in the latter district it 
usually occurs as the var. minor Lindenb. It does not 
extend as far north as does R. sorocarpa. The most 
common habitat for this plant is bare cultivated ground in 
moist retentive soil, but it is also found on banks and at 
the sides of reservoirs. Fruit is generally present from 
September to November. In Scotland, the species of this 
genus seldom survive to the middle of winter. 
This species has been much confused with others until 
recent years. What was considered to be R. glauca or 
sometimes R. crystallina was generally the more common 
R. sorocarpa. The older records of the present species are 
on this account of little value unless specimens are available 
for examination. 
S.W. Lownanps.— Dumfries: Garden path, Moffat 
(Johns.). Kirkcudbright: Field, New Galloway (M‘And.). 
N.W. Low.anps.—Renfrew : Lochwinnoch (Ewing). 
K. LowLanps.— Peebles : North Esk Reservoir, alt. 1150 ft. 
(Evans). Edinburgh: Thriepmuir Reservoir (Evans); Rose- 
bery Reservoir (Evans); Harlaw Reservoir (Evans). Lin- 
Lithgow: S. Queensferry, stubble field (Evans); nr. Baads 
(Ewing). 
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