Flora of Scottish Lakes. 
73 
1909-10.] 
mersed plant growing at the margin of lochs and in slow streams, in 
water 6 to 24 inches deep. The floating stem, 12 to 30 inches long, 
has at every node elongated roots and a fascicle of leaves. The 
radical leaves are few, and have a slender petiole 3 to 8 inches long, 
with a small entire ovate or elliptical lamina \ inch to 1 inch 
long. The stem leaves are similar to the radical ones, but smaller, 
more linear, and float more or less upon the surface. No specimens 
were found in either flower or fruit, perhaps owing to the lateness of 
the season (September). The whole plant is weak and flaccid when 
withdrawn from the water. It is very abundant in the neighbour- 
hood of Locbs Recar, Ballochling, etc. It cannot, therefore, be 
treated as a mere “ sport,” but rather as an aquatic form of 
R. Flammula. From this aspect it is most interesting, as it presents 
a case of an aquatic plant derived from a common semi-aquatic 
or almost terrestrial progenitor, and the form from Tents Muir 
may be considered as an intermediate stage in the evolutionary 
process. 
Caltha palustris, L. “ I., II., III.,” IV., V., VI., VII. An abundant 
plant about lowland lochs, especially in Area VII. 
Caltha palustris, L., var. minor, Syme. “ I.,” IV. About the hill lochs, 
see remarks ante, p. 971. 
NYMPELEACEiE. 
Castalia speciosa, Salisb. { = C . alba, Wood). “I., II.,” IV., V., VI., VII. 
Very common and abundant, especially where the water is not very 
peaty (figs. 21, 61, 86, 87, etc.). 
Castalia speciosa, Salisb., var. minor {DC.). “ I.,” IV. Less abundant 
than in Area I. ; see remarks ante, p. 971. 
Nymphsea lutea, L. “ II.,” IV., V., VI., VII. Common and abundant, 
often overgrowing large areas, but seldom seen in the hill lochs (figs. 
31, 87, etc.). 
Nymphsea lutea, L., var. intermedia ( Ledeb .). IV., VII. Grows with 
the larger form, and sometimes alone, particularly in the lower 
portion of L. Ken, where it is very abundant. Rather rare in 
Area VII. 
Ny mphrna pumila, Hoffm. “I.,” IV. Not common; chiefly in L. Ken 
and L. Stroan. 
plus grande, nageant a la surface de beau, dont toutes les feuilles sont entieres, les in- 
ferieures ovales, obtuses, portees sur de tres-longs petioles ; les superieures etroites, 
lineaires, aigues ; les pedoncules presqu’uniflores ” {Lam. Encyc., vol. vi. (1804), pp. 98-99). 
