56 Rhodora [ MARCH 
opposite branches or peduncles which are seldom 5 mm. long. Some 
plants which I collected on Cape Cod have opposite branches above, 
and the flowers are opposite and closely racemose on the ends of these 
branches. The corolla is one and one-half times the length of the 
calyx, its segments are rather blunt and often slightly denticulate. The 
stigma, about 2 mm. long, is slightly exserted. 
Bartonia iodandra, on the other hand, is erect, from a more or less 
decumbent base, but my largest' specimen which is 25 cm. high was 
somewhat nodding. The general appearance of the plant is straggling 
whereas that of B. zene//a is very erect and strict. "The stem is single 
in every specimen I have seen and either lacks entirely the basal scales 
or has only a few, widely separated and alternate. The branches or 
peduncles are mostly alternate, erect or curved-ascending, 1 to 6 cm. 
long. The flowers are terminal and somewhat larger than those of Z. 
tenella. The corolla is twice the length of the calyx and its lobes are 
lanceolate and entire. ‘The stigma is short and thick and mostly in- 
cluded within the corolia. 
I have said above that the anthers in my specimens are yellow, so 
that if my plants are B. codandra, as they appear to be, this character 
is not to be relied upon. 
B. iodandra varies from P. tenella in appearance, in habitat, in the 
basal scales, length of peduncles, length of corolla and shape of its 
lobes, and in the stigma, an array of differences which ought certainly 
to constitute a valid species. Of the real B. Mosert ( Centaurella 
Moseri, Steud. & Hochst.) we know very little. In the only specimen 
which I have seen, which is in the Gray Herbarium, collected by 
Drummond at Covington, Louisiana, the habit is entirely different 
from that of either B. /ene//a or todandra and the flowers are very 
small, hardly half the size of those of B. zodandra. To determine 
whether there is any affinity between this species and B. /eme//a or 
iodandra it will be necessary to have more and better material. 
B. iodandra was also collected at Grand Lake, Newfoundland, by 
Rev. A. C. Waghorne, in August, 1897, and at Cape Breton Island, in 
August, 1898, by Prof. John Macoun. There is also a specimen in the 
Gray Herbarium írom the herbarium of William Boott, collected in 
October, 1859, at Weymouth, N. J., which is undoubtedly referable to 
B. iodandra. ‘This New Jersey station and that in the Blue Hills are 
the only ones within the United States known to the writer, and it is 
hoped, now that their attention is called to it, that collectors may re- 
