386 96. naiadacbjE. 



2-ceUed. Si/. JE. B. 1426. — I doutt the constancy of these cha^ 

 meters. — Stagnant water, y. Braokisli water. A. or P. V. — 



vm. E.S.I. 



2. Z. polycar'pa (Nolte) ; style scarcely -J of length of eon- 

 verging sessile nuts, fr. 6 — 6 subsessile crenulate on hack, cott- 

 verging, style scarcely ^ length of fr., stigma large repand, anth. 

 2-celled. — Much like Sp. 1. — In water. A. V.— VIII. Orkney. 

 Belfast. S. I. 



Order XCVI. NAIADACE^. 



Fl. monoecious or dioecious, in a spath. Perianth 0. Stam. 

 free, 1 — 3. Ovary 1, superior, with 1 ovule. Style 1 ; stigmas 

 2 — 4, filiform. Fr. a nut enclosed in the persistent spath. 

 1-celled, 1-seeded, not bursting. Albumen 0. Embryo with a 

 thin skin having a lateral cleft. 



1. ZosTEBA. Fl. imperfect. Stam. and pistils inserted in 

 two rows upon one side of a spadix. Spath linear, leaflike. 

 Fl. naked. Anth. 1. Ovary 1 ; style 1 ; stigmas 2. 



2. Naias. Fl. imperfect, solitary, sheathed ; no perianth. 

 Barren fl. of 1 stamen. Fertile: style short; stigmas 2 — 4 

 filiform. 



1. Zosib'ka lAnn. Grass-wrack. 



1. Z. ndna (Roth) ; 1. linear 1-veined, ped. filiform, spadix 

 short with 2 — 5 clasping bands, nuts smooth. — E. B. 8. 2931. 

 iJ. vii. 2. — Plant small, scarcely 3 in. long. L. slender. Ped. 

 pale-coloured throughout, J as broad and quite as long as the 

 inflated oblong-lanceolate spaths. Ripe seed shining black.— 

 Muddy estuaries. P.PVII. VIK. E.S.I. 



2. Z. marina (L.) ; I. linear 1 — 7-veined, spadix without 

 bands, nuts striate. — E. B. 467. R. vii. 4. — Plant long. L. 

 broad. Ped. rather strong. Ripe seed milky white. — Z. angus- 

 tifolia, Sy. E. B. 1430, B.. vii. 3, is a slender form growing 

 upon mud, with fewer veins in its 1. and rather longer peduncles 

 which are much compressed and green upwards and narrow 

 gradually into the spadix.— In the sea. P. ? VII. VIII. E. S. I. 



2, Na'ias Linn. 



1. N. flex'ilis (Rostk.) ; 1. very narrow and very minutely 

 denticulate, sheaths ciliate-denticxdate.— iSy. E, B, 1432. — L. 



