1018 OXCV. NAIADACEJE, [Cymodocec, 
Tarbus VIL | NarADER. 
10. Naias, Linn. Gen. n. 1096.—Flores monoici v. dioici, axillares. Fl, d' sessilis v. 
p Perianthium duplex, exterius tubulosum v. ventricosum integrum v. 4-fidum ; 
int tenuissime hyali , antherce dunat tamen 1 ; anthera sessilis, ellip- 
soidea v. oblonga, 1-4-locularis,.apiculata v. 9-cuspidata, loculis rimis longitudinalibus 
dehi ibus; pollen glob Fl. 9 : Perianthium 0, v. tenuissi: carpello adhzerens, 
Ovarii ll li sessile, ellipsoid v.L lat apice tatum, stig- 
matibus 2-4-subulatis v. capillaribus ; ovulum basilare, erectum, anatropum. Carpellum 
t »blong v. ellipsoideum, indehi , periearpio erustaceo v. subdrupaceo. 
Semen pericarpio conforme, erectum, testa tenuissima ; embryo semini conformis, rectus, 
iremi tyled i supera radiculari consimili, plumula immersa.— Herb: tenerz, 
submersw, rhizomate filiformi repente, caulibus ramosis ssepius filiformibus interdum 
molliter muricatis. Folia opposita alterna v. 3-natim verticillata, linearia, integerrima. 
serrulata v. sinuato-dentata, enervia, basi breviter vaginantia. Flores solitarii v. glo- 
merati, 
Species ad 10, aquarum duleium regionum tropiearum et temperatarum incole. Kunth, Enu. Pl. 
iii. lll. — Benth. Fl. Austral vii. 181. Magnus in Nuov. Giorn. Bot. Ital. ii. 187. Griff. Notul. 
iii, 181; Ze. PL. Asiat. t. 237 ad 254. 
Genus in sectiones 2 divisum :— 
l. Ewnaias. Flores dioiei, subsolitarii. Anthera 4-locularis, pedicellus spathella calyptriformi 
demum fissa apice 2-euspidata inclusus, perianthio 4-fido. Fl. 9 perianthio 0. Caules et folia 
molliter muricata. Naras, Willd. in Mem. Acad. Sc. Berlin, 1798, 87. Schnizl. Iconogr. t. 71... Nees, 
Gen. Fl. Gerin. Monocot. iii. n. 44. Schkuhr, Handb. t. 296. L. C. Rich. in Ann. Mus. Par, xvii, 7. 1. 
Theden. in. Flora, 1840, 306, t. 5. Delile, Fl. Eg. t. 50. Griff. Ic. Pl. Asiat, 1.951 ad 254. Hook. 
Fl. Bor. Am. t. 184. Fruviaris, Michel, Nov. Gen. t. 8. ; 
2. Caulinia. Flores monoici, glomerati. Anthera 1-4-loeulari , peri 
Fl. ? perianthio carpello adh Caulis et folia inermia,  Delile, FI. Eg. t. 60, f. 3, Schkuhr, 
Handb. t. 296. Cav1iNiA, Willd. in. Mem. Acad, Sc, Berlin, 1798, 87, et in. Ken. et Sims, Ann. Bot. 
ii. 48, 7. 1, 2, Nes, Gen. Fl. Germ. Monocot. ii. n. 45. Froviaus, Pers. Syn. ii. 030. — Balb, et 
ANocca, FI. Ticin. i.t. 15. IrrNERA, Gznel, Fl, Bad. iii. t. 4. 
hio anie dose 
Tarsus VIIL — CvwopocEx: 
16, Cymodocea, Kon. in Kwn. et Sims Ann, Bot.ii. 96, t. 7.—Flores monoici v. 
dioiei, axillares, vaginis membranaceis v. foliaceis inclusi. Perianthium 0. Fl: 
Antherz 2, ad apicem stipitis (filamenti ?) elongati sessiles, a dorso in corpus oblongum 
connatze, loculis basi et apice distinctis rimis longitudinalibus extrorsum dehiscentibus ; 
pollen confervoideum. Fl.9 : Ovarii carpella 2, distincta, subsessili. , 0voidea, comp 
v. tumida, in stylum att ; Stigmatibus elongato-subulatis recurvis ; ovula solitaria, 
sub apice loculi pendula, orthotropa. Carpella matura oblique ovoidea, sessilia v. stipi- 
tata, tumida v. comp ginibus rotundatis, v. complanata et marginata, indehia- 
centia, pericarpio coriaceo v. subsueculento intus indurato. Semen pendulum, late 
id v. obl y. pl , testa iuscula; embryo semini 
y jy i medio lateri posita caudiformi adscendente. margini 
embryonis applicita.— Herbze submersw, rhizomate rigido repente, nodis articulatis et 
ieantibus, caulibus brevibus simplicibus erectis v. elongatis et dichotome ramosis. 
Folia graminea, ad nodos fasciculata v. apices versus ramorum dense distiche imbricata, 
brevia v. elongata, obtusa, integerrima. v. serrulata, basi vaginantia, vaginis stipulif 
mibus in ligulam brevem productis. Flores in axillis infimis solitarii v. in ramis floriferis 
numerosi, 
ined p 
£ GOSEEI Pen die En 
Species 3, orum mariti, tropi et subtropi. orbis veteri et Australis incole, KuntA, 
