30 LEMNACE.E Lemnu, 



Hab. in fossis fere iibiquo, Grjecia in Atlica et Cephaloniu (Heldr !), Ma- 

 cedonia (Griseb.), Syria littoralis (Bl !), Tauria et prov. Caucasicai (Ledeb.)^ 

 Ar. Creogr. Totus fere terrarum orbis in temperatis et tropicis. 



3. L. paucicostata (Hegelm. Lemn. p. 139 tab. VIII) frondlbus 

 obovatis vel oblongo-obovatis valde asymmetricis tenuibus, coleor- 

 riza alato-appendiculala, radicis calyplra acula, semine orthotropo. 

 "^. Hegelm. Lemn. tab. VIII. 



Hab. in aquis, Egyptus in Oasibus (Schweinf ! Aschers!) 

 Ar. Geogr. India orientalis, Japonia, Africa tropica, America boreaiis et 

 tropica, Polynesia? 



4, L. gibba (L. Sp. 1277 frondibus obovatis crassis superne 

 convexiusculis subtus valde convexis spongioso-inflatis enerviis 

 coleorrhizalonga cylindrica exappendiculata, radicis calyptra sfepius 

 breviter acutata,seminibus 1-6 a^alropis ^. — Telmatophace gibba 

 Schleid. Linn. XIH, p. 301. — Rchb. XIV. Germ. tab. — Hegelm. 

 Lemn. tab XI-XIII. 



Hab. in aquis, Gra'cia in Peloponneso (Orph !), Macedoni» insula Thasos, 

 (Friedr), Egyptus inferior circa Alexandriam (Gaill! Schweinf. Letourn.) 

 ad lacum ]\Ienzale (Ehrb.), Benha(Schweinf.), Kahiram (Schweuif!) in ditione 

 Fayoum (Aschers!(Schweinf!), inOasibusdesertiLibyci(Scliweinf ! Aschers!.) 

 Affghania^Griff!). " 



Ar. Geogr. Europa Africa borealis etaustralis, Australia, America. 



SPIRODELA (Schleid. Linn. XIII, p. 39i). 



Omnia Lemnre, sed radicellae plures. Frondes basi membranaceo- 

 foliata3. Antherarum locelli coUaterales, longitudinaliter dehiscentes. 

 Ovula 1-2. Vasa spiralia manifesla. 



1. S. polyrrhiza (L. Sp. 1377 sub Lemna) frondibus subro- 

 tundo-obovatis crassis utrinque planis subtus non spon^iosis palma- 

 tim et apice convergcntim nervosis 8-4congestis,radicelIis fascicula- 

 tis, orulis hemianatropis, fructu sub l-spcrmo^.— Ic. Rchb.Germ. 

 fig. 17. — Linn. XIII, p. 392- Spirodela potyrrhizaSchleid. Hegelm 

 Lemn. p. 151, tab. XIII-XV. — 



Hal). in aquis, Egyptus(Del.,Schweiuf.),Transcaucasia ad Lenkoran (Ploh.). 



Ar. Geogr. Prob. Orbis totus, (ex Africuaustrali,Polynesianondum innotuil). 



ORD. CXXVII. ARACE.E. 



(Meisn. Gen. 3G1. — Aroidetc Juss). 



Spadix carnosus simplex floribus s;epius unisexualibus et nudis 

 rarius hermaphroditis et perigonialis totus vel pro parte tectusSpa- 



