558 
XLVIII. HAL0RAGEA5. 
[Myriophyllum. 
the females. Petals in the males under 1 line long, btamens 8. Females 
without petals. Styles 4, very short. Carpels 4, rarely above \ line long, 
obtuse on the back, more or less tuberculate. 
Hab.: Mount Elliott. E. Fitzalan (F. v. M.) ; Balonne River at St. George’s Bridge, Mitchell ; 
Moreton Bay, C. Stuart; common. 
The species has some affinity to the northern M. verticillatum as well as to the Asiatic M. 
indicum, but beside the differences in the floral leaves, the fruit is much smaller than in the 
former, much less furrowed between the carpels than in the latter. As in the allied species, 
flowers are occasionally found also in the axils of the submerged leaves. — Benth. 
8. IKE. latifolium (broad-leaved), F. v. M. Fraipn. ii. 87 ; Benth. Bl. Austr. ii. 
488. A large species. Leaves in whorls of 8 or sometimes 4, the lower sub- 
merged ones divided into capillary lobes, those of the tall erect emerged 
summits lanceolate, serrulate, f to lin. long, narrowed into a petiole. Flowers 
rather large, all sessile. Male flowers : Calyx-lobes small. Petals 1J line long. 
Stamens 8. Female flowers : Calyx-teeth inconspicuous. Carpels 4. Styles 
short, very plumose. Fruit scarcely exceeding a line, somewhat acute and 
verruculose. 
Ilab.: Brisbane and other southern localities; Rockhampton, M. A. Tliozet. 
4. M, gracile (a slender plant), Benth. FI. Austr. ii. 488. A small slender 
almost filiform species. Leaves alternate, all, even the uppermost floral ones, 
deeply pinnatifid or pinnatisect, with few (3, 5 or 7) narrow, rather short lobes. 
Flowers small, solitary, the upper ones males, calyx-teeth very small. Petals 
under 1 line long. Stamens in the males 8. Carpels 4, small, tuberculate. 
Hab.: Moreton Bay, F. v. Mueller ; and other southern localities. 
3. CALLITRICHE, Linn. 
(From kalar, beautiful, and thrix, a hair.) 
Flowers unisexual, without any perianth, the males consisting of a single 
stamen, with a conspicuous filament and small 4-celled anther, the females of a 
sessile or stalked 4-celled ovary, with 2 filiform erect or recurved styles, stigmatic 
from the base ; ovules 1 in each cell, laterally suspended from near the summit 
of the cell. Fruit small, more or less flattened, notched at the top, 4-celled and 
4-lobed (that is, surrounded by a double edge), the edges obtuse, acute or winged, 
and consisting of two 2-celled disk-shaped carpels, united by their inner faces. 
Embryo in the axis of an oily albumen. — Slender aquatic herbs. Leaves 
opposite, entire. Flowers axillary, solitary or a male and female from the same 
axis, each one between two small bracteoles, which are sometimes wanting. 
The genus is found in almost every part of the globe, and, according to some botanists, 
consists but of a single species; others divide it into two, the Australian one belonging in that 
case to the one which has the most universal geographical range. Those who variously extend 
the genus to from 13 to 20 species describe the commonest Australian form as endemic. — Benth. 
1. C. verna (a spring plant), Linn.; DC. Prod. iii. 70 ; Bcntli. FI. Austr. ii. 
492. A glabrous slender perennial, either floating in water or creeping and 
rooting in mud, flowering young so as to appear annual, varying in length 
according to the depth of the water. Leaves either all obovate-orbicular or 
oblong, 1 to 6 lines long or the lower submerged ones narrow-linear and obtuse 
or notched at the end, the upper ones obovate and spreading in little tufts on the 
surface of the water, or all submerged and linear. Flowers minute. Fruit from 
i to 1 line diameter, with obtuse acute or winged edges. — C. autumnalis, Linn.; 
DC. l.c., partly at least. 
Hab.: Common on damp land and in pools of still fresh water of southern Queensland. 
