52 ENGLISH BOTANY. 
Sup Species I1.—Caltha radicans. 
Piate XLI.* 
Forster, in Trans. of Linn. Soc. Vol. VIII. p. 323. Bab. Man. Brit. Bot. ed. v. p. 11. 
C. palustris, var. 3, Hook. & Arn. Brit. Fl. ed. viii. p. 11. 
C. flabellifolia, Boreau ? Fl. du Cent. de la Fr. ed. iii. Vol. IT. p. 21 (non Pursh). 
C. alpestris, Schott ? An. Bot. Vind. 
Radical leaves deltoid or reniform-deltoid, the lobes diverging 
so that the base is not at all cordate; margin with triangular teeth. 
Stem rooting at the joints. 
Extremely rare. Ina ditch that runs from the farmhouse called 
Haltown, on the estate of C. Gray, Esq., of Carse, Forfarshire, 1790, 
found by Mr. George Don. Mr. Hewett Watson has a specimen 
collected by himself in Braemar, which he is inclined to refer to this 
sub-species. 
Scotland. Perennial. Summer. 
This. plant comes very near to some of the small forms of 
C. eu-palustris; and Mr. H. C. Watson informs me that the young 
state of this plant (which he has had in cultivation for many years) 
closely resembles C. eu-palustris ; but the remarkable difference 
observable in the shape of the radical leaves, when fully developed, 
which has remained constant in cultivation for about fifty years, 
leads to the conclusion that it is more than a variety of that plant. 
Original specimens of Don in the Herbarium of the British Museum 
are destitute of radical leaves, but possess distinctly deltoid-dentate 
stem leaves such as I have never seen on C. eu-palustris. The 
flowers are about 1+ inch across, with oval-oblong sepals, yellow. 
C. flabeilifolia (Pursh) has the flowers the size of those of Ranun- 
culus arvensis, and appears to be distinct from the present ; but 
Professor Boreau’s description of the French plant to which that 
name has been given agrees well with C. radicans. C. alpestris 
(Schott) may also be this, judging from his description of the radical 
leaves. 
Marsh Marigold, Water Caltrops, or Meadow Mout. 
French, Le Populage des Marais. German, Sumpf-Dotterblume. 
The generic name is derived from the Greek xadafoc¢ (kalathos), a cup or goblet, to _ 
which the expanded flower may be likened. The praises of the Marsh Marigold have 
* The Plate of C. radicans is E. B. 2175, with a radical leaf added by Mr. J. E 
Sowerby. 
