MACLOSKIE : REVISION OF FLORA PATAGONICA. 25 



My knowledge of the species of this genus is, from want of material, 

 very incomplete. I am not so fortunate as to have at hand the paper of 

 Stapf entitled "Die Arten der Gattung Ephedra." But I may add, E. 

 amencana var. Humboldtii, as already inserted; see supra. Also E. 

 nana Dus. should be added. In 1908 Dr. Stapf informed me that E. 

 nana is probably identical with E. americana var. rupestris ; but recently 

 Dr. Skottsberg has informed me that Dr. Stapf has changed his opinion 

 and is now inclined to accept E. nana as an independent species. 

 Ephedra tweediana is probably to be deleted. D. 



Family 6. POTAMOGETONACE^;. Macl., p. 147. 



Add Macl., p. 147, 1. 15 from foot, the diagnosis: 



Ruppia maritima L., marine submersed herbs, with linear-capillary 

 leaves, from whose sheathing base the forked capillary stems proceed, 

 bearing naked, 2-staminate flowers, and 4 small sessile drupes. Magellan, 

 at Punta Arenas. 



Add Macl., p. 148: 



POTAMOGETON STRIATUS Ruiz et Pav. (1798). 



(P. australis F. Philippi.) 



Stems long, branching, flattened (in nature?). Upper leaves spuriously 

 opposite, linear, 8 cm. long, 2 mm. broad ; the lower often broader, sheath- 

 ing at base, acute at apex, 3-nerved. Ligules oblong-linear, evanescent 

 Peduncles 2-3 cm. Spike 8-io-flowered, contiguous. Fruit elliptical, 

 3 mm. long, dorsally thick, not keeled. 



Trop. S. Amer.; Patagonia. 



Macloskie gives considerably more species than actually occur in Pata- 

 gonia, and some of them may be dismissed at once, for instance P. ens- 

 pus, P. Friesii and P. interruptus. P. Friesii, it is true, Macloskie states 

 to have been collected by Hatcher at Rio Coy, but his specimens most 

 certainly do not belong to this species. 



Macl., p. 149: P.juncifolius should, likewise, be struck out. 

 sequence of Hagstrom's definition of this species, I admitted it into my 

 work "Die Gefasspflanzen der Magellanslander" but Hagstrom himself 

 has changed his opinion and now considers the specimens collected to rep- 

 resent a new species, P. magellanicus Hagstr. Later still, he has 

 this determination not to hold good, and now thinks the specimens in 



