Triglochin.] OXXXVII. NAIADEJX. 169 
but usually 6. ralia, Drummond, n. 314, Preiss, n. 2405 ; Blackwood and 
Tweed dub zd Pant Crean, 0 2 eld. 
Carpels 3, r 6, curved as in the var. eleutherocarpa and 
spent pe from the first, po inai when in fruit.— T, dubium, R. Br. Prod, 
313.—M:Adam Range and Robinson Rive er, F. Mueller ; Cape River, Bowman ; 
Rocking gham Bay, Dallachy. I se no specimen in Brown's herbarium but refer 
this to his species from his diagn 
The gen us Cynogeton was dal by Endlicher opony on the peeeoe d a second 
abortive ovule in each carpel. This second ovule is not mentioned by any other 
Observer. and H ooker could not find it. I searched i in v pa Tor it ia: a mue of 
ieties and it is only in that I found a minute 
stipitate gan hed to hai short funicle iba might scantily be an iani. ovule, 
peiess 
though qui 
5. T. Maundii, F. Muel. Fragm. vi. 83.—Roots apparently thiek, 
with numerous small fibres. Stems erect, terete, leafless, 2 ft. high or 
more, No leay 
the ss 8 , Fruit about 3 lines long, cylindrical, but with 2 furrows on 
thin] as da each carpel, the carpels almost drupaceous, each with a 
"uy cartilaginous endocarp with an acute dorsal rib, the exocarp 
tie Im rather thick, the 9 dorsal obtuse ribs often leaving cell-like cavi- 
ires ween them and the endoearp. Seed ae cylindrical, erect. 
aundia triglochinoides, F Muell. Fragm. i. 23. 
Queensland. Brisbane Riv Mueller, W. Hill, Baile 
N. S. Wales. Tweed d RAE ree is ^: 
T probably from : "ipe error that F. Mueller described the seed as pendu- 
alwa d celled erede not 8 to 12 1-celled ones, the cells being 
YS united in p pun by the connectiv 
2. POTAMOGETON, Linn. 
um hermaphrodite. Perianth- segments 4, scale-like, small, 
sapr at the base or almost s stipitate. St tamens 4, itiserted 
» : 
dep, the cells opening outwards in longitudinal slits. Carpels 4, 
Solitary’ Ship short, beni or the oblique stigmas sessile ; ovules 
Fruit ach carpel, laterally attache at or above the middle. 
of 4 nti ts or fewer by abortion, somewhat drupaceous, t 
"i membranous or Soccer) fleshy, the endocarp rather hard, crus- 
obovoid e curved or horseshoe-shaped, round a clavate or 
shape d projection of the endocarp ; testa membranous. Embryo the 
E seed.— Aquatie herbs with a perennial rootstock ; stems 
^ "d pa at el floating usually forked and often rooting at the lower 
alternate or rarely opposite, wholly submerged or with 
