234 THE JOURNAL OF BOTANY 



under the name of P. natans L., as so many specimens of its nearest 

 ally P. amplifolius Tuck, have in America. It has the extraordinary 

 development of the stipules noticeable with the American plant ; 

 but the lower leaves are much less developed than in that species, 

 although the plants are alike in facies. 



Cf 



o 



Potamogeton Fryeri, sp. n. Stems simple (?), 0-5-1 m. Ion 



stout. Lower leaves mostly lance-linear, variable, often folded and 

 arcuate (as in amplifolius),! -veined, the central one compound with 

 elongate-areolation, with numerous cross-veins, the outer ones often 

 branched. Upper leaves (floating) long petioled, 1-1^ dm. long, 

 oblanceolate to elliptical, the blade decurrent on the petiole, with- 

 out a joint, acute or subacute, 21-34-veined, connected by very 

 numerous branched sub-veins, the whole surface of the leaf with 

 irregular netted areolation. Stipules 5 cm.-l dm, long, subacute, 

 very strongly striated with numerous (31) veins with cancellate 

 areolation between ; even when the stipules are nearly decayed 

 the thick frayed fibres are persistent. Peduncles 1-1 '5 dm. ong, 

 swelling upwards, but contracted at the base of the spike. Spikes 

 2 cm. long, dense-flowered, sepals (perianth-segments) orbicular. 

 Fruit (not quite mature) 5 mm. long by 2*5 mm. broad, without 

 teeth or bosses ; ventral face straight, with a subacute style (1*5 cm. 

 long) slightly curved to the dorsal face; dorsal face rounded, central 

 keel (carina) prominently and sharply winged, the two outer keels 

 slightly winged. Embryo semi-annular slightly constricted in the 

 middle, very large, almost filling up the fruit with the exception of 

 the style-base and fruit-base. 



Habitat. Japan : Kiurchui, Nagasaki, May and June, 1863, 

 Maximovicz in herb. Baagoe I ; Shirkawa, July, 1877, Faune, 

 no. 28 ; Nippon in paludis Nambu, June, 1905, Faurie, no. 7184. 

 Corea, in aquis Ouen-san, July, 1906, Faurie, no. 217. 



Plant in appearance between P. nutans L. and P. amplifolius 

 Tuck., differing from P. amplifolius and P. pulcher Tuck, by the 

 winged fruit, subacute ventral face, the embryo only semi-annular, 

 and the much smaller lower leaves ; and from all other species by 

 the winged fruit and semi-annular embryo. When the wings are 

 so developed it is a usual condition in the genus that they are 

 crested or waved, but this is not so here. The stipules are re- 

 markable for their stoutness and rigidity, with persistence of the 

 fibrous parts ; and the floating leaves for their structure, the 



netted areolation is very close and compact, making the leaf very 

 strong. 



The fruits are (so far as I know) very remarkable for the ex- 

 panded wing of their dorsal face ; this must develop very rapidly 

 towards the maturing of the fruit, as in the earlier stages I can find 

 no distinct appearance of it. 



Potamogeton Franchetii, sp. n. Some time before his death 

 Herr Baagoe, of Nsevsted, Denmark, sent me a drawing and speci- 

 men of a Potamogeton which M. Franchet had named "P. natans L." 

 I at once recognized it as one sent me by M. Faurie, of which there 

 is a poor specimen in the Kew Herbarium. We agreed it should 

 bear M. Franchet's name, and that Herr Baagoe should describe it ; 



