138 Rhodora [AuGUST 
Typical R. pygmaeus of the Arctic regions, Labrador and the Can- 
adian Rocky Mountains has the basal leaves merely lobed, not divided 
to the base, and the fruiting heads are 3-5 mm. long. In its basal 
leaves var. petiolulatus is quite like the rare Rocky Mountain species, 
R. Grayi Britton, but it has the small petals and achenes of R. pygmaeus. 
On Mt. Albert collections were made on two days at different points 
and all the material distributed under one number. The full sheet 
retained at the Gray Herbarium contains a few plants of true R. 
pygmaeus, but most of the specimens (presumably from a different 
station) are the variety. 
* RanuncuLus PEpDatTiFIDUS J. E. Sm., var. leiocarpus (Trautv.), 
a comb. R. affinis R. Br. in Parry, Ist Voy. Suppl. App. 265 (1824). 
dh by var. leiocarpa Trautv. in Middendorf, Reise in Sibir. i. 62 
184 
All the material seen by the writer from Arctic America, the Labra- 
dor Peninsula, and the Hudson Bay region, including a duplicate type 
of R. affinis from Melville Island, has glabrous achenes and character- 
istic pedately many-cleft basal leaves. In the Rocky Mountain 
region this plant is rare, the common plants there being true R. peda- 
tifidus, with pedately cleft basal leaves and pubescent achenes, and 
var. cardiophyllus (Hook) Britton,! with the basal leaves mostly 
uncleft and merely crenate or dentate. In Siberia, too, there are 
apparently large areas where only the glabrous-fruited variety is 
found. This, at least, is indicated by Trautvetter’s note: “In speci- 
minibus taimyrensibus omnibus Ranunculi affinis R. Br. ovaria prorsus 
glabra sunt; attamen in herbario horti botanici Petropolitani inter 
specimina daurica ejusdem speciei nonnulla inveni, in quibus carpella 
aeque pilis prorsus carent. 
RANUNCULUS REPENS L., var. pleniflorus, n. var., foliis basilaribus 
ternatis, foliolis suborbicularibus basi rotundatis. vel subcordatis 
margine crenatis vel late obtuseque dentatis; floribus plenis. 
asal leaves ee the suborbicular leaflets rounded or sub- 
ssaciate at base, margin crenate or with broad obtuse teeth: 
flowers double — Cie in old gardens, and tending to become 
naturalized in meadows, roadside-ditches, ete. Type: well estab- 
in meadows and along roadsides, Oneida, Herkimer County, 
New York, May 30, 1900, J. V. Haberer, no. 1530 in Gray Herb. 
+ Records of this plant from rom Quebec and Labrador seem to ha been based R. Allenii 
Robinson, Ruopora, vii. 220 (1905). eT es 
