238 ERYTHEA. 
genera, just as syngenesious anthers run through some hun- 
dreds of genera in four or five different natural orders; but 
the remarkable habit of Nemacladus would, we suppose, in 
the judgment of most botanists, exclude from it any plant 
with erect, simple, racemose stems and an abundant herbage 
of opposite leaves. 
We purpose denominating this very interesting plant 
Baclea’ oppositifolia. Nemacladus oppositifolius, Rob- 
inson, Proc. Am. Acad. xxvi. 168. 
» The seeds of this plant are not only perfectly smooth, but 
somewhat compressed. In Nemacladus they are never in 
the least flattened, and are always striate or reticulate, or 
both. Dr. Robinson seems not to have mentioned the fact 
that this plant has a perennial and somewhat fleshy root; 
peculiarities which may be construed as connecting it the 
more intimately with the 8. African Cyphia and the 8. 
American Cyphiocarpus. 
Bolelia lwta. Stems simple, erect, 2 to 5 inches high, 
sparingly leafy and few-flowered: tube of corolla very short, 
tarbinate; larger lip cleft to the middle into ovate acute, not 
widely diverging, lobes; smaller lip half as large, the lobes 
similar, not reflexed but only ascending; the whole corolla 
almost white, or with a yellowish central spot indistinctly en- 
circled by pale blue. 
At Humboldt Wells, Nevada, July, 1893. A very distinct 
species; the most easterly known member of this far western 
genus. 
2In honor of the Swiss botanical collector, Bacle, who traveled in 
Senegal and in outh America, and died at Buenos Ayres before the 
middle of this century. 
THE RIPARIAN BOTANY OF THE LOWER 
SACRAMENTO. 
By Wruuis L. Jerson. 
The Sacramento River is the great interior waterway of 
northern California; it drains the northern half of the Cali- 
. fornian valley as the San Joaquin drains the southern half. 
