70 
NAJADACEAE, HYDROCHARITACEAE 
550. 2^ustei'a nana Botii 
Italia — 1. 
5ol. Uymodocea nodosa Asch. 
Italia — 1. 
552. Najas niariiia JJ. 
It. pen., Sic. — 2-4, acq. 
553. Najas minor Ali. 
It. bor., centr. — 2-4, aoq. 
554. Najas graminea Del. 
It. bor. — 3 acq., nat. (As., Afr.). 
555. Helodea canadensis Eicli. 
It. bor., centr. -- 2 e acq., nat. 
(Am. boi-.). 
556. Vallisneria spiralis L. 
It. bor., oentr. — 2 e 3, acq. 
557. Stratiotes aloides L. 
Mnntov., Ferrara, Chioggia — 3, acq. 
658. Hydrocliaris ilorsus-ranse L 
. It. bor-, centr. — 2 e 3, acq. 
