FLORA ARABIGA. 473 



Distrib. : Also found in Europe, Asia Minor, Syria, Kurdistan, 

 Persia, Afghanistan, India, Burma, Malacca and Manchuria. 



3. N. marina L. Sp. PL ed. I (1753) 1015, var. Ehrcnbergii A. Br. 

 in Journ. of Bot. II (1864) 275. 



Habitat : II. Yaman (ex Rendle). 

 Distrib. : Arabia, Tunis, Socotra. 



4. Zaimichellia Mich, ex L. 



1. Z, palustris L. Sp. PL I (1753) 969. 

 Habitat : I. Arabia Petraea. 



Distrib. : Cosmopolitan species wanting only in Australia but found 

 in New Zealand. 



5. Ruppia L. 



1. R. rostellata Koch ex Reichb. Ic. PL Crit. II, 66. 

 Habitat : I. Tor ex aqua subdulci thermarum (Ehrenb. !). 

 Distrib. : Common in brackish waters. In almost all temperate 

 and subtropical countries. 



%. R. maritima L., var. spiralis (L.) Aschers. in Boiss. Fl. Or. V 

 (1884) 18. 



Habitat : I. Near el Tor (Schimp. 219 !). 



Fr. : March 1835 (Schimp.). 



Distrib. of type : Temperate and tropical regions. 



6. Potamogeton (Tourn.) L. 



1. P. iiatans L. Sp. PL I (1753) 126. 



Habitat : III. Dhofar Mts., Derbat Lake, 240 m. (Bent 211 !). 

 Distrib. : A widely dispersed plant, found in nearly all temperate 

 climates. 



%. P. natans L., var. serotinus Boiss. Fl. Or. V (1884) 16. 

 Habitat : I. Arabia Petraea (ex Muschler). 

 Distrib. : Distribution of type. 



3. P. pusillus L. Sp. PL I (1753) 183. 



Habitat : II. Northern slopes of Jebel Shibam, above Menacha 

 2,500-2,600 m. (S. 1674 ! 1963). 

 Distrib. : Almost cosmopolitan. 



4. P. Preussii A. Benn. in Fl. Trop. Afr. VIII (1902) 222. 

 Habitat : II. Arabia, Yaman (Den.). 



Distrib. : Tropical Africa. Arabia. 



