216 Rhodora [SEPTEMBER 
D. incisa n. sp. Rootstock interrupted by the union of. 4 to 11 
or more distinctly fusiform annual segments 1 to 3.5 rarely 6 cm. 
long, slightly tubercled in the axils of distinct teeth, commonly on or 
near the surface and propagating by late-appearing branches ; 
remains of earlier stems and leaf-stalks occasional, from obscure to 
5 mm.long. Stems 2 to 4 dm. high, glabrous, simple stout. Leaves 
ternate, glabrous, those of the stem 2, opposite or nearly so, rarely 
3 and alternate, on petioles 1 to 4 cm. long; basal usually present, 
on petioles 1.2 to 2 dm. long. Leaflets sessile or slightly united at 
the base, rather sparingly and minutely serrulate to ciliolate-serrulate, 
unequally, coarsely, and more or less deeply incised-dentate, the teeth 
from subacute to rounded and acutely mucronate: of the stem-leaves 
4 to 9 cm. long, 1 to 3.5 cm. wide, narrowly lanceolate to lanceolate, 
the central one a little longer than the strongly inequalateral and 
commonly more deeply incised lateral ones: those of the base and 
detached rootstocks commonly 1.5 to 2 times wider than accompany- 
ing stem-leaflets, 5 to 1o cm. long, 1.5 to 6 cm. wide, more deeply 
incised or lobate, short-petiolate. Flowers averaging 9 (5-13), 
white, drying nearly so or more or less purple-tinted; petals 15 to 
20 mm. long, 5 to 8 mm. wide, obovate, rounded at the apex, fully 
2.5 times length of sepals. Pedicels 1 to 3 cm. long. Style soon 6 to 
8mm.long. Pods not seen. — Sherman, ona rich damp slightly open 
to thickly wooded hillside, 2-15 m. above the Housatonic River, 
125-128 m. alt., 19 April, 1903, Austin & Hames, no. 3820; 3 May, 
1903, Austin, no. 3820a ; 10 May, 1903, Austin & Eames, no. 3820b ; 
16 June, 1903, Austin, no. 3820 c. (Type material in the author's 
herbarium, also in herb. Gray.) 
‘This species differs particularly from D. dipylla in the rootstock, 
the incised and sharply mucronate teeth of the leaflets which are 
distinctly narrower on the stem, and in the large petals: from D. 
maxima in its usual freedom from the premorse remains of former 
stems and leaf-stalks fairly characteristic of that species, its opposite 
leaves which are markedly different in situation, size, shape and mar- 
ginal characters, sessile leaflets, length of pedicels and of the petals 
actually and comparatively with the sepals. 
D. Maxima Nutt. Rootstock interrupted by the union of 4 to 1o 
or more distinctly fusiform annual segments 1.2 to 3.5 rarely 5 cm. 
long, tubercled in the axils of prominent incurved teeth; commonly 
on or near the surface and propagating by late appearing branches; 
remains of earlier stems and leaf-stalks generally present, premorse, 
prominent, persistent and distinctive, 2 to 6 mm. long. Stems 2 to 
3.5 dm. (2 ft. Vutt.) high, glabrous and commonly stout. Leaves 
ternate, glabrous, those of the stem 2 or more commonly 3 (2 to 
7 Nutt.), alternate, often remote, rarely 2 and subopposite, much 
smaller than in the preceding, on petioles 1 to 8 cm. long; those 
from the base, when present, and detached rootstocks on petioles 1 
to 2 dm. long. Leaflets prominently petiolate, moderately to freely 
