186 CXXXIX. ALISMACEÆ. [ Alisma. 
more slender yek in that species. Carpels usually only 2 or 3 perfect 
14 or rarely 2 lines long, very obtuse, the 3 or 4 prominent dorsal ribs 
smooth or tubereulat ate but not murieate.—.4. glandulosum, Thw. 
qu. Pl. Zeyl. 3 
stralia. hs ere River, F. Mueller ; Port Darwin, Schultz. 
sev: Moreton Bay, Hill and = Mueller ; Herbert’s Creek and Gains- 
ford, Jionian Rockingham Bay, Dallach 
Also in Ceylon and East India. This an the par — — prove to be 
arieties of a single one. The A. pligeeum varie , some of the 
Rocki ingham Bay specimens are not 6 in. high, wit Soll ciem “The larger speci- 
mens have loose canto of about 1 ft. and rather large leaves, sometimes very thin. 
reniforme, Don, Prod. Fl. Nep. 22.—Leaves orbicular- 
cordate or reniform, 13 to 4 in. long and dium broader than long, very 
Reine with 13 to 17, usually 15 imary nerves, the transverse veinlets 
merous fine and closely parallel. Panicle very large, with long 
RE branches not numerous in each whorl. Outer perianth- 
segments nearly orbicular, many-nerved, about 2 lines long. Carpels 6 
or fewer, rarely 7 or 8, thick and more or less drupaceous, with several 
usually 7 or 9 dorsal ribs not tuberculate, the style Xa slender, 
nate to the inner edge to near the summit.— Wight, 
Queensland. Burnett River, F. Mueller ; Rockhampton, O Shanes y; Rocking- 
ham Bay, “Dalach y. 
e spec common in many parts of East Sgt JB Mueller, Fragm. viii. 
214, refers this | to the -— A. parnassifolium, Linn. and Micheli, who has been 
studying the order with Acme care, thinks it mad be a variis only, but the broad 
almost retuse DA of the leaf, its numerous primary nerves and the g enerally larg? large 
habit, together oig the great geographical aar may justify ra retaining it a8 
a distinct speci 
2. DAMASONIUM, Juss. 
(Actinocarpus, R. Br.) 
Flowers hermaphrodite. Perianth of 6 segments, 3 outer one 
membranous, 3 inner larger "ui rando: itm y fugacious. Stamens 
Ovules 2 in each car carpels 6 to 9 or rarely pe 
laterally flattened, adnate by their Soa Dus to the convex or conica 
e setae tapering into a beak, spreading, when ripe usually pront 
ff transversely near the base. Seeds 2 or solitary by abortion. S 
bryo horse-shoe as 658 —Aquatie or marsh herbs, with the habit 0 
the annual Alism 
o 
Besides the Australian species which is endemie, the genus comprises two wo 
from =m northern seen, an all three closely allied to each other and possi y 
varie 
1. D. d Salisb.; Kunth, Enum. ‘iii, 155.—A tufted glabrous 
annual. es all nana on long petioles, from ovate-cordate t0 
lanceolate, 1 ph 2 in. long, with 3 or 5 primary nerves connected bf 
several rather distant transve rse veins, and these again by numero 
