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488 XLV. HALORAGEiE. \Myrio]}hyllum, 



L 



fl. very small, witliout apparent calyx-teetli or petals. Carpels 4, small, 

 smootli or slightly tuberculate.— Hook. f. Fl. Tasm. i. 121. 



Victoria. Australia Felix, F. Mueller ; Wendu river, Robertson. 

 Tasmania. Tresh and brackish waters, Georgetown and in the Derwent, /. B. Hooker, 

 S. Australia. Murray river. Lake Victoria, pools on !Moant Barker, F, Mueller. 

 Also in New Zealand and in extratropical S. America. 



3. M. verrucosum, LindL in Mitch. Trop. Audr. 384. Usually much 

 smaller and more slender than the last two species. Leaves mostly in whoils 

 of 4, the lower submerged ones divided into capillary lobes, the emerged 

 floral ones sessile, oblong or lanceolate, all pinnatifid with short obtuse lobes, 

 more or less glaucous, mostly about 2 lines long. Flowers rtither smaller 

 than in M. elaiinoides. Calyx-lobes very small, but perceptible in both sexes 

 ver)^ deciduous in the females. Petals in the males under 1 line long. Sta- 

 mens 8. Females without petals. Styles 4, very short. Carpels 4, rarely 

 above ^ line long, obtuse on the back, more or less tuberculate. 



N. Australia. Victoria river, Bynoe ; Albert river, Gulf of Carpentaria, ¥. Mueller. 



Queensland. Bulonne river at St. George's Bridgre, MiicJiell ; Moreton Bay, C.Stuart, 



N, S. Wales. Port Jackson to the Blue riloniltains, R. Brown and others; water- 

 holes io the Severn, Leichhardt ; in the interior towards the Barrier Range, Victorian Ex' 

 ji edition^ 



Victoria. Waters on the GrampianS, muddy places by the Barwan, etc., F. Mueller, 



S. Australia, S. coast, R. Brown, 



W. Australia, Brummond, 3r^ ColL ?, n. 186, 4tk Coll, 7i. 80; pools, Murchison 

 river, Oldfield. 



The species has some affinity to the northern M. verlicillatum as well as to the Asiatic 

 M. indicum, but besides the differences in the floral leaves, the fruit is much smaller than ^ 

 • in the former, much less fun-owed between the carpels than in tlie latter. As in the allied 

 species, flowers are occasionally found also in the axils of the submerged leaves. 



4. M. latifolium^ F, Muell. Fragm. ii. 87. A large species. Leaves 

 in wdiorls of 3, the lower submerged ones divided into capillary lobes, but in 

 the specimens seen always few^, those of the tall erect emerged summits lan- 

 ceolate, seiTulate, f to 1 in. long, narrowed into a petiole. Plowers rather 

 large, all sessile. Male fl. : Calyx-lobes small. Petals 1| lines long. Sta- 

 mens 8. Female fl. : Calyx-teeth inconspicuous. Carpels 4, styles short, 

 very plumose. Fruit not seen. 



K. S. "Wales. Port Jackson, R. Brown; Clarence river, Bechler. , 



5. Ma Muelleri, Bond. Herb, The plant appears to be entirely suh- 

 merged. Leaves opposite or rarely in whorls of three, all pinnately divided 

 into capillary lobes, those of the upper floral leaves however not quite so fine. 

 Flow^ers monoecious in the upper axils, the males rather large, solitaiy or 2 to- 

 gether, on a peduncle of about 2 or 3 lines, each one enclosed before expand- 

 ing in an almost petal-like hood-shaped bract, the bracteoles remaining small. 

 Calyx-lobes very small. Petals above 1 line long. Stamens 8. Kndimentary . 

 styles conspicuous. Female fl. sessile. Calyx-teeth almost imperceptible, pe- 

 tals none. Styles 4, erect, usually as long as the ovary, papillose from the 

 base, but not plumose. Fruit-carpels about ^ line long, smooth. 



Victcria, "Watery ihirsbcs, Melbourne, Adamson. 



S. Australia. Near Holdfast Bay, F. Mueller, 



"W. Australia. King George's Sound or to the eastward, Baxter, 



