/ 



THE NOMENCLATURE OF POTAMOGETONS. 299 



Potamoqeton jaranicas Hasskarl, Act. Soc. Ner. i. p. 26 (185G). 



P. tenuicaulis F. Mueller, Frag. Phyt. Aust. i. 90 & 244 (1858). 



P. paroifolia Buchenau, Reliq. Rutenberg. pp. 32-33 (1880). 

 (Dr. Schinz would add P. Huillensis Welw., but I have myself not 

 seen a fruiting specimen of this.) 



P. hybridus? Hooker (non Michx.), Khasia, Herb. Kew ! 



Distribution : — India ! China ! Java ! Madagascar ! Niger 

 Country ! Australia ! 



Miguel (Illust. Fl. Arch. Ind. p. 46, 1871) remarks on the 

 probability of P. tenuicaulis Muell. being javanicus Hassle, and notes 

 that the same species is found in Japan (Prolusio. Fl. Japon. fasc. 7 

 p. 325, 1867). Mr. Bentham, Fl. Austr. vii. 171 (1878), remarks 

 that Mueller had considered javanicus and tenuicaulis the same, but, 

 in the absence of specimens of the Javan species, left it an open 

 question. The Rev. T. Morong (Torrey Bulletin, 1886, p. 158) 

 identified the Torrey herb., Formosan, and Indian plants as 

 tenuicauUs Muell. Dr. Buchenau, when describing P. parvifolia, 

 does not mention the Australian plant ; he probably had not access 

 v ^to specimens of it, or he would have seen they were the same. 



P. filifolius R. A. Philippi, Florula Atacamensis, No. 357, 

 1860 ! — A specimen of this, kindly sent me by Prof. Philippi, 

 proves the plant to be a Ruppia, which I hope he will name it. 

 atacamensis. 



P. flabellatus Babington, Man. Brit. Bot. ed. 3, p. 343 (1851). 

 — Mr. Fryer has taken a good deal of trouble to find out what was 

 really meant by this plant, and the conclusion he has come to is 

 that it is a more abundant plant than P. pectinatus type. From 

 being mixed up with pectinatus forms by nearly every botanist, 

 before Mr. Fryer's careful researches, it has been doubtful to what 

 extent the name referred to a local (or perhaps endemic) form ; 

 hence certain comparison with continental forms was hardly possible. 

 But the plant is contained in Willdenow's Herbarium at Berlin, 

 No. 3204, f. 5 ! and this is the earliest I have as yet been able to 

 trace it to ; this is P. interruptus Kitaibel ap. Schultes, Oest. Flora, 

 ed. 2, p. 328 (1814), the specimens being named by Kitaibel him- 

 self; the label runs thus: — "P. subverticiUatus = P. interruptus 

 mihi in stagnis salsis, Kitaibel." If considered a variety of 

 pectinatus L., the earliest name I can find is P. pectinatus var. 

 dickotomus Wallroth, Sched. Crit. p. 68 (1822). Dr. Kerner, 

 recognising the difference between it and pectinatus, named it P. 

 juncifulius ! (cfr. Tiselius, Bot. Notiser, 1884, pp. 91-92). So Prof. 

 Babington's name must become a synonym. Mr. Druce, in his 

 * Flora of Oxfordshire,' has " P. junceus K." I suppose he means 

 juncifolius by this ; but it was a pity to introduce another needless 

 synonym, as Babington's name is far older than Kerner's. 



P. gracilis Wolfgang, ap. Roem. et Schultes, Sys. Veg. 

 Mant. 3, p. 355, 1827. — " Siberia orientali Merck in herb. 

 Steven," Wolf. /. c. " Two specimens from Wolfgang are in the 

 herbarium at Helsingfors," Dr. Kihlman in litt. Dr. Kihlman has 

 named this plant /'. Wolfgangii under the mistaken supposition that 

 Fries' P. gracilis (Nov. Fl. Suec. ed. 2, p. 50, 1828) was an earlier 



