CXXXVIII. NAIADEA, 165 
Flowers hermaphrodite, spicate. Leaves alternate. 
Spikes enclosed when young in the sheathing bases of 
aves. Stamens 2. Carpels 2 at first sessile, 
but when in fruit on long stalks . . . . . . . 3. RUPPIA. 
Spikes several on a lo scape,. each with 2 sheathing 
bracts at the base in the axils of a floral-leaf. Sta- 
mens 3. Carpel 1, sessile. Marine plant . . 4. Postponi. 
Flowers unisexual, spicate. . Leaves alternate. Spikes 
andr ous enclosed in the base of floral leaves.. 
Stamens and carp i OMe wikia Sd eats aes 
Flowers xual, solitary within the sheathing bracts. 
Leaves alternate. Anthers 2 or 3, dorsally connate. 
Anthers 2, Carpels 2. arine plan 4A be sors AN RM OHBODRA: 
thers and carpels usually 3. Subsaline aquatic plants 7. 
afud unisexual solitary, Leaves opposite. Carpels 
80 . 
Antherl, Carpeli-seeded . RA aor ee E a ARAM 
Anthers 3, Carpel several-seeded . . . . . . . . 9. HALOPHILA. 
TRIBE I. Potamem.—Flowers hermaphrodite. Anthers short and 
broad, sessile at the base of the scale-like perianth-segments. Carpels 
3 to 6, L-seeded. 
l. TRIGLOCHIN, Linn. 
(Cyenogeton, Endi. Maundia, F. Muell.) 
Flowers hermaphrodi ianth- ents 
à phrodite or rarely polygamous. Perianth-segments 
‘cale-like, 3, 6 or fewer. . Stamens ‘as many or few 
iret, the short terminal styles or stigmas always distinct. Ovules soli- 
T4 fin each carpel, laterally attached below the middle. Fruit of 6 or 
i mdeh scent deciduous 1-seeded nutlets, the 3 empty carpels of some 
= Ta remaining attached to a central axis and assuming the appear- 
“e of dissepiments of a capsule. Seed erect, cylindrical or ovoid, the 
aquatic her ws embryo straight, the shape of the seed.—Marsh or 
er Chers, Leaves all in radicai tufts, linear or filiform. Scapes 
mee Simple and leafless, bearing a terminal spike of small flowers 
e or shortly pedicellate, without bracts. 
ei gents is Spread over a great part of the globe, but mostly in extratropical or 
Australian i 
cal regions, Of the 5 species, one is generally a 
Nader as well as southern temperate and eabinepionl America, South Africa, and 
: * -= 
Shark the others appear to endemic, Triglochin, with its nearest 
Alismacee y orming the tribe of Juncaginee under or - to, 
in the peo ri It appears to mo to be much more nearly connected tamogeton 
ye . * 
| the Greek, cuter, but modern purists have called attention to the feminine gender of 
from ved. 
* aL Eutriglochin.— Fruits with 3 perfect deciduous nutlets, leaving a 
