568 CLXX. NAIADACEE. (J. D. Hooker.) 
4 RUPPIA, Lim. 
: te. 
Submerged slender branched brackish-water plants. Leaves elongate, 
filiform, sheaths stipuliform. Flowers minute, bisexual, 2-6 together within 
the leaf-sheath on a short peduncle which usually elongates gren Lien 
flowering, and is then straight or spirally twisted. Periant! it) long- 
2, sessile, opposite, 2-celled. Carpels 4, 1-ovuled, at length om PE m or 
stipitate, stigma sessile; ovule pendulous. Achenes ovor d o nd sub 
beaked. Seed uncinate, embryo macropodal.—Species tempera 
tropical. 
R. rostellata, Koch in Reichb. Ic. Crit. ii. 66, fig. 906 ; Ic. "a in 
vii. t. 25; peduncle straight after flowering, achenes obliquely ovo; 196; Ic. 
beaked. Boiss. Fl. Orient. v.20. R. maritima, Grif. Moi, m. ^993 
Pl. Asiat. t. 257-259. temp. 
TuRoveHout Tatta and in CEYLON, in brackish water.—DISTRIB. Europe 
and trop. Asia. 
wpe in. Achenes 
Stem 2 ft. and upwards. Leaves 1-3 in. Fruiting peduncle 1-6 in 
zs in. long. 
5. ZANNICHELLIA, Linn. 
aves 
Submerged salt-water plants, with slender rootstock and stems. 2" a 
linear, sheaths stipular. Flowers minute, enclosed in the lea D 3-celle 
male and fem. in one membranous spathe. Male fl. a lina Carpe 
anther, filament slender. Fem. fl. perianth cupular hya wé e; ovale 
2-9. sessile; style long slender, stigma oblique peltate, mE reniform, 
solitary, pendulous, orthotropous. Achenes 4, sessile or stipita tvledonary 
crested. Seed pendulous, testa thin; embryo subcylindric, coty 
end twice folded on itself.—Species 4—5, or forms of one. 
cle 
Z. palustris, Linn. Sp. Pl. 969; subsp. PEDICELLATA; male Poig as 
short, achenes 2-4 subsessile, back crenate or tubercled, S Branden. 
the body of the achene or longer, anthers 2-celled. Aschers. 2 `Z. pedun- 
668; Boiss. FI. Orient. v. 15; Micheli, Nov. Gen. t. 94. f. 2. i herosa 
culata, Reichb. Fl. Germ. vii. t. 16; Ic. Crit. viii. t. 700. 4. £ i 
lat H ’ _ pedi- 
Reichb. 1.1. c. c. t. 16 and t. 759. Ic. Fl. Germ. Vil. t. 21, To gen? 
256 5 am. in Wall. Cat. 5185; Griff. Notul. iii. 190 ; Te. PI. Asiat 
, 256. 
Lu W, Tibet-— 
Salt marshes and lagoons throughout INDIA, ascends to 15,000 ft. in W. 
DISTRIB. (of Z. palustris), all regions but ? Australia. Tibet ; 
I find the following ls amongst the Indian specimens: 4, from ez style 
flowers sessile or very shortly peduncled, achenes stipitate, dorsally gsile, achenes 
shorter than the achene; b, from the Panjab and Behar; flowers ere c, from 
stipitate smooth or tubercled dorsally or ventrally or both, style very slender ; d, 
Western Tibet, alt. 12-13,000 ft.; flowers sessile, achenes sessile from the Panjab 
from the Panjab ; flowers subsessile, style as long as the achenes; €, ITO 
n tet 
` ]e gho 
and Behar ; flowers peduncled, achenes small as long as their stalks, sty 
than the achene. 
6. NAIAS, Linn. 
Submerged plants ; stem branched, filiform, smooth or me minut 
opposite alternate or whorled, linear, entire or toothed. outer tubular 
axillary, monæcious or diecious. Mars ri. Perianth an OU”, adnate 
or inflated entire or 4-fid tube and a hyaline inner. Stamen ^ 
v es 
