ARACEAE (AUCTORE ENGLER). 213 
Herba aquatica, post folia pauca pedunculum atque in axilla 
folii ultimi ramum continuatorem foliis (non cataphyllis) incipien- 
tem proferens. Foliorum petiolus longus, longe vaginaceus, lamina 
oblongo-elliptica vel oblonga, natans, nervis lateralibus I. et I. 
adscendentibus, distantiusculis a basi ad apicem procurrentibus, 
venulis oblique transversis connexis. Pedunculus longus, sub- 
mersus, apice incrassatus, spadicem tantum emergens. Spatha 
soluta, membranacea, spadicem juvenculum involvens, serius dis- 
cedens atque pedunculo longe superata. Spadix tenuiter conoideus, 
deusiflorus, sursum florens. 
O. aquaticum Linn. Amoen. II. 17. t. 1. £ 3. Spec. 463 
(Catesb. Car. 1. t. 82. Ait. Kew. I. 199. Willd. Spec. II. 199. 
Bart. Am. 2. t. 37. Torr. Flor. I. 358. Pursh Flor. I. 235. Lodd. 
Bot. Cab. t. 402. Hook. Exot. Flor. t. 19. Kunth En. II. 85. Schott 
Gen. Ar. t. 92. Prodr. 421. — Pothos ovata Walt. Carol. 294. 
' Foliorum petioli cire. 2 dm. longi, lamina 1,5—2 dm. longa, 
medio 0,25—1 dm. lata, utrinque aequaliter angustata, folium pe- 
dunculum involvens (spatha) longitudine valde variabilis, semper 
longe vaginaceum , plerumque lamina destitutum, rarius lamina 
lineari-elliptica instructum. Pedunculus 2—3 dm. longus, 3—4 
mm. crassus, apicem versus crassior —Spadix 2—3 cm. longus, 
apicem versus sensim atque leviter attenuatus. 
New-Jersey (h. Reg. Monac); Pensylvania. Philadelphia (Fried- 
ley); Delaware (Rafin. in h. DC); Alabama (Jewett); Kentucky 
(Hook. in h. Reg. Ber); Carolina (Fraser. in h. DC); Florida (A. 
Gray in h. Boiss); Louisiana: New-Orleans (Drummond). 
XII. CALLA (Linn. Spec. 1373). Kunth En. HII. 58, Schott 
Melet. T., Gen. Ar. t. 69, Prodr. 345; Endl. Gen. p. 239 n. 
1697. (De ramificatione confer: A. Braun in Verh. d. bot. 
Ver. d. Prov. Brandenb. I. (1859) p. 84—97 et Engler in Nova 
Act. l. c. p. 169. 7. 3 Fig. 12). 
Flores hermaphroditi, nudi. Staminum cire. 6 filamenta le- 
viter complanata, latiuscula, apice abrupte in connectivum breve, 
tenue acutata, antherae breves thecis ellipticis, oppositis, quasi 
peltatim insidentibus rima longitudinali lateraliter aperientibus. 
Ovarium breviter ovoideum, 3?-gynum, uniloculare, 6 — 9 - ovula- 
tum; ovula anatropa oblonga, funiculis brevibus erectis placentae 
