69 
NOTES ON POTAMOGETON. 
By Arraur Bennett, F.L.S. 
(Continued from Journ. Bot. 1902, p. 149.) 
PoraMOGETON LIMOSELLIFoLIUS Maxim. ex Korshinsky in Act. 
Hort. Petrop. xii. 8393 (1893). 
Amur (lat. 53°, long. 120°). ‘‘ Hab. in aquis stagnantibus ad fl. 
Fawitaja prope Michailowskoje inter Zejam et Burejam 28 Jul. 
[1891]. et fr. imm. [leg. 8. Korshinsky]. A fi. Ussuri medium 
ras Buldshi a Maack inventa (Regel, Fl. Ussur. p. 189, sub nom. 
usilli); eadem planta a Wright 1 in insulis Loo-Choo Hit: tschu) 
solleate est (herb. Horti Petrop.)” 
The Abbé Faurie has sent from Corea specimens collected in 
1901, in rice-fields near Chinhampo, which seem exactly to accord 
_ with this plant. Dr. Britton writes me that it is not in Wright’s 
collection from the Loo-Choo a eae ong Ringgold and 
Rodgers in 1853-6). There are specim the National Her- 
barium from Manchuria (prov. Wasitangoo) Sollagted in 1902 by 
Dr. Litwinow (no. 1633 
The aspect of the plant i is much that of a delicate P. Miduhi- 
kimo Makino , or P. cristatus Regel & Maack; unfortunately there are 
no ripe fool ‘on the Abbé’s specimens. With P. lateralis Moro ong 
and P. javanicus Hassk. it forms a group remarkable for their close 
resemblance to each other in facies, yet with very different fruits. 
Maximowicz fron gor P. limosellifolius with cristatus Regel & Maack, 
but that has the most complex fruit of any species of the genus, 
and would form an excellent object of study in evolution if it coul 
be grown for that purpose. As P. limosellifolius was collected in 
1891, and Maximowicz died in February of that year, it must have 
been one of the last age: which that estimable botanist examined 
before his death. In writing to me only a few months before, he 
mentioned that he expected to be able to send me some interesting 
specimens of the genus from Asia, a hope he did te live to fulfil. 
The other Corean species ae? sen me as Abbé Faurie 
a *)y 
a that are probably the plant named by Franchet, as 
** P, polygonifolius,” not the plant of Pourret, but probably a new 
species, which will be described as such by M. Baagoe. Another 
sheet, marke re ** Potamogetun in rivulis Syon. Ouen, 0. 692,” is 
probably a a new Aponogeton. Among Japanese specimen s diste- 
—mine are poor examples; it may be, better ae are 
extant in yee sets. One at least of my examples seems to be 
referable to P. a Rafin., var. Cayugensis Wiegand ene: st 
ing Cham.). The species is sometimes difficult to se 
from P. americanus Cham. (P. lonchites Tuck.) by the hecovea 
leaves only, but my specimen has the peculiar siscaiave of epi- 
