436 33, sPATiGANirM simplex, [cl. xx^ 



O. muscifera, Smith. Fl Brit. 3. 937. Etigl Bot G4. 

 Wither hi^^ Arrang. 2. 43. 



Gcog t aph ical D Iftiibu twn . 



The northern Hmit of the growth of this plant is another 

 proof of the principle formerly laid down, that in the western 

 countries, plants are found at a higher latitude than in the 

 eastern, on account of the warmer temperature. In Sweden, 

 O. myodcs is found only in Gothland and Oeland, (57*^ N. 

 Lat.) In Norway, on the contrary, it is found, according to 

 Gunnerus,. at Snaasen, (64° N. Lat.) ; and, according to Fl. 

 Dim.., it is even found on the island Langoe, (69 N. Lat.) 

 •It is diffused throughout England, France, Germany, Hun- 

 gary, Italy, and Transylvania. Its southern limit seems to 

 be Peloponnesus, (38°.) The four varieties mentioned by 

 Desfontaine (Fl. Atl. 2. 320.), under the name Ophyrs insec- 

 iife7'a, do not belong to this. I have also a doubt, whether 

 O. myodes of Hagen (Pruss. Flor. 2. 215.), be really our 

 plant. Its eastern limit north^vard would then be 20^ W 

 Long., southward 25.°. 



CLASS XXL 



33. 



Sparganium simplex, lliuh. 



Einfache Igelsknospe. — French, Ruhanier simple. — Engl. 

 Simple Bu r-reed, — S wed . Rak-trdgjan . 



This peculiar plant flowers in July and August, in our 

 standing waters and ditches, especially where the bottom is 

 gravelly. From a creeping, perennial, fibrous root, arises 

 about perhaps a foot or a foot and a half high, a round, 

 green, smooth stem, which is wholly undivided, and about the 

 thickness of a quill. All the leaves embrace half the stem with 



