1903] Eames,— The Dentarias of Connecticut 215 
were found to have rootstocks somewhat anomalous in character and 
in other respects differed from any species now recognized, as will 
be described. This leaves the station for D. maxima noted in the 
present article the only one so far known in the state. 
The plants reported by Mr. Bissell and D. AeferopAy//a do not 
have jointed rootstocks although in the latter the fragile constricted 
connecting parts promotes easy rupture. D. /aciniata, on the other 
hand, does have truly jointed and characteristic rootstocks in which 
fracture must and does occur at the precise place in which the apex 
of one portion is seated within a corresponding depression in the one 
beyond. 
Inasmuch as our northeastern species are, in part, still imperfectly 
known and revision of these seems desirable, an attempt is made to 
outline the more important characters in the following summary, in 
which I have had the valued advice and coöperation of Dr. B. L. - 
Robinson. 
SYNOPSIS OF SPECIES. 
* Rootstock continuous, prominently toothed: stem glabrous: leaflets 
dentate, bluntly mucronate. 
D. DIPHYLLA Michx. Rootstock long and continuous, prominently 
toothed, the annual segments elongated, 3 to 9 cm. long, very slightly 
tapering; on or near the surface and propagating by its branches. 
Stems 2 to 4 dm. high, glabrous, stout, simple rarely with an addi- 
tional flowering branch bearing a single ternate leaf. Leaves ternate, 
glabrous, those of the stem 2, opposite or nearly so, rarely 3 and 
alternate, on petioles r.2 to 3.6 cm.long; basal usually present, 
long-petioled and similar. Leaflets 2 to ro cm. long, 1.5 to 6 cm. 
wide, sessile or short-petiolate, minutely serrulate, unequally and 
coarsely subacute- to round-dentate, bluntly mucronate; central ones 
rhomboid-subovate, lateral obliquely so, often slightly lobed. Flow- 
ers white; petals roto 15 mm. long, twice as long as the sepals. 
Pedicels 1 to 3 cm. long. Pods rarely matured, 2.5 cm. long or more 
including style 6 to 8 mm. long. —In rich damp moist or springy 
soils containing much humus, in woods and shaded situations. 
Apparently throughout the state except near the coast in the south- 
eastern part. Usually in colonies and local, but rather frequent in 
the northwestern third of the state. 
* * Rootstock interrupted by distinct constrictions, distinctly toothed : stem 
glabrous: leaflets incisely-dentate, -cleft or -lobate, sharply 
mucronate. (Exceptions in last species). 
