Monochoria. ] CXXVIII. PONTEDERACEX. 73 
base. Seeds ovoid, with 10 to 12 prominent ribs.— Limnostachys cyanea, 
F. Muell. Fragm. i. 24. 
nc i i Upper bored River, F. gren ; Gilbert River, Gulliver. 
Que Po nison, Fitzalan ; Hein iver, Rockhampton and 
M esami “Bowman, Thozet, O’ Shanesy, and EDEN 
ite species is very near to the common East Indian M. vaginalis, Presl, but the 
are more sessile, and the stamens are nearly equal Milo as tooth on the 
Pee of the odd stamen characteristic of both the Indian speci 
Orpver CXXIX. PHILYDRACEZ. 
hypogynous; filament flattened ; anther vitat shaped, attached 
at the base or adnate, with 2 parallel cells, straight or twisted, open- 
ing in longitudinal slits; staminodia 2, hypogynous, alternating with 
Flowers sessile and solitary within more or 
the eX of a simple spike, or along the 
simple branches of a terminal pan 
The row is limited to the three Australian genera, and. is almost endemic. One 
Species o 
WP e d RUM n: into eos tropical Asia, and one of uncertain origin may 
Anther terminal, ery much twisted. Ovary imperfectly 
3-celled. Leaves flag-like. PUES E long, simple . 1, PHILYDRUM. 
Anther not ed but reflexed outw. Ovary perfectly 
3-celled. Leaves few, narrow. Spike short, simple . 2, PRITZELIA. 
Anther erect 
Ovary 
3-celled. Leaves flag-like. Spikes in a terminal branched 
Rete, AEST, . 8. HErLMHOLTZIA, 
1. PHILYDRUM, Banks. 
ae rianth-segments s many-nerved, the margins slightly involute in the 
he attached to the base of the anterior segment and | not 
AE i t; filament flattened, tapering upwards; an 
Sverse, the ee = eee twisted ; staminodia hypogynous, but 
a slightly connate at the base with t e anther-bearing filament 
à x Be l-celled with. $ parietal pléesato projecting far into the cavity but 
g in the centre, each with 2 divaricate broad lobes covered on. 
Inner or under surfaco with v very Voters aba style columnar, 
With a à terminal road 3-angled stigma. Capsule oblong, opening 1 
