1918-19.] HOTANICAL SOCIETY OF EDINBUKGH 817 



position here; for ochreatux he had access to New Zeahmd 

 and Tasmanian specimens only. Most of these are un- 

 branched. The}' are much " stretched," i.e. the internodes 

 are long, as much as 18 cm. long, with very few branches 

 if any (1-2). while in N.S. Wales specimens they are only 

 3-fi cm. long, and branched at ever}' node with stout 

 branches (i.e. furcate). Then he says of his new species 

 the leaves are " cuspidata " ; so they are in Victorian 

 specimens. Like all the narrow-leaved Potamogetons, this 

 goes through a series of changes in leaf-apices from early 

 growth to flowering state. In Raoul's specimens (lower 

 portions especialhO tJie leaf-apex is, as he describes it, 

 " linearibus apice rotundatus vel truncatus," while in N.S. 

 Wales specimens (Yarrogobilly River) the leaves of the 

 flowering portion are subacute ! I have specimens from 

 " Australia felix," Baron v. Mueller (which he gives as one 

 of the two stations of his new species), but it is ocJtreatu.'i 

 without any doubt. Again, he gives " stylus elongatus 

 subcurvatus." This is simply a question of age in the 

 style, not the resulting condition of ripe fruit. He admits 

 the "Anatomia, vide supra," i.e. ochreatiis. Again, the 

 plant varies greatly in colour, from the green of New 

 Zealand and Tasmanian specimens to the brownish green 

 (" fusco-viridia ") of the Murray River and other specimens. 

 A far wider divergence from Raoul's specimens is shown 

 by one from the Murray River (Tepper leg.). This has 

 internodes only 2 cm. long, branched at every node, leaves 

 6-8 cm. long by 6 mm. wide (Raoul's has them 2-3 mm. 

 wide), stipules stronger than usual, 20 mm. long, semi- 

 translucent, and quite a brownish green. This I have 

 called /. latifolia. The habit and aspect of the plant is 

 so different that, taking the single specimen, it might 

 well be another species, but in all essential characters it 

 is ochreatus, Raoul. Dr. Hagstrom had four specimens at 

 his disposal for his two species. I had twenty-four at 

 mine. I see in Raoul's second description (Choix pi. Nou. 

 Zelande, 13, 1846), he says, "Stylus v. stigma minimum, 

 introrsum, obliquum." That disposes of the new species. 



P. JJlei, Schum. (Brazils). — I do not grasp either Schuraan's 

 reference in Fl. Brazil., iii, 3, 690, 1894, or Hagstrom's. The 

 first refers to P. ocJireatus, Raoul. The nervation in this 



