122 FLORA OF TASMANIA. {Haloragece. 
tisve integerrimis v. grosse et irregulariter serratis pinnatifidisve, fl. $ 8-andris, calycis lobis minutis, car- 
pellis lasvibus.— Be Cand. Prodr. iii. 68 ; Fl. Ant. ii. 271 ; Fl. K Zeal. i. 63. {Gunn, 75, ex parte.) 
Hab. Fresh and brackish water, Georgetown, and in the Derwent, Gunn. — (Fl. Oct. to Feb.) (v. v.) 
Distrib. South-eastern Australia, New Zealand, and extratropical South America. 
A common water-weed, forming dense masses, in still or gently-flowing waters. — Stems sometimes many feet 
long, their apices raised above the water when flowering. Lower submerged leaves crowded, capillaceo-multifid ; 
those higher up the stem shorter, pinnatifid, the upper five to seven in a whorl, linear-oblong or lanceolate, acute, 
acuminate or blunt, toothed, laciniated or entire, i~| inch long. Flowers dioecious, sessile in the axils of the up- 
permost leaves : females with no calyx or corolla : males with a minute calyx, four petals, and eight stamens. 
Fmit smooth, or nearly so. 
2. Myriophyllum varisefolium (Hook. fil. Ic. Plant, t. 289) ; caulibus elongatis, foliis 5-7-natim 
verticillatis confertis, inferioribus capillaceo-multifidis, intermediis pectinatis, superioribus anguste linearibus 
integerrimis, fl. <$ 8-andris, calycis lobis petalis \ brevioribus, carpellis leevibus.— Fl. N. Zeal. i. 64. {Gunn, 
75, ex parte.) 
Hab. Abundant in fresh water throughout the Colony, Guun.—(Fl. Oct. to Feb.) (v. v.) 
Distrib. South-eastern Australia and New Zealand. 
Stems several feet long, generally much stouter and more succulent than those of M. variafolium. Leaves 
seven in a whorl, the lower capillaceo-in;. ite ones pectinate, the upper quite entire, linear, all 
crowded ; in young specimens all the upper are pectinate ; in shallow water the whorls of multifid leaves are few, 
distant, and small. Flowers dioecious : males with four small sepals : females with short, plumose styles, and 
linear-oblong carpels, which have not been examined ripe. 
b. Leaves opposite. Stamens 8. Female flowers with a four-toothed calyx. 
3. Myriophyllum amphibium (Lab. Nov. Holl. ii. 70. t. 220) ; prostratum, caulibus brevibus 
crassiusculis, foliis oppositis obovato-oblongis spathulatisve obtusis integerrimis, floribus sessilibus, fl. <$ lobis 
calycinis petalis \ brevioribus, staminibus 8, fl. ? calyce 4-dentato, carpellis turgidis Isevibus, stylis sub- 
elongatis recurvis. {Gunn, 1068.) 
Hab. Wet places, Recherche Bay, Labillardiere, Gunn.— (EL Dec.) 
Distrib. South-western Australia. 
Very unlike the preceding species, and more resembling CaUitriche.— Stems prostrate in mud, 2-6 inches 
lono, panngly branched. Leaves opposite, spathulate, i-i inch long. Flowers very minute, sessile, females most 
numerous. Calyx four-toothed, teeth alternating with the stigmata, and almost hidden between the carpels ; male 
flowers with a four-lobcd calyx half as long as the petals. Fruit of smooth, punctate carpels, with rather long, 
recurved styles; albumen scanty; embryo cyhndrical, stout, straight. 
1. Myriophyllum pedunculatum (Hook. fil. in Lond. Journ. Bot. vi.474) ; parvulum, foliis oppo- 
sitis linearibus, floribus pedicellatis, fl. <? calycis lobis lanceolatis petalis linearibus \ brevioribus, staminibus 8, 
fl. ? calyce 4-dentato, stylis recurvis plumosis, fructibus sicco rugosis.— M. simplicifolium, Ferd. Mueller. 
{Gunn, 1959, 2020.) (Tab. XXIII. B.) 
Yar. a ; foliis subspathulatis, floribus plerisque pedicellatis. 
Tar. /3 ; foliis linearibus carnosis, floribus sessilibus. 
Hab. Abundant in shallow pools and inundated river-banks, ascending to 4000 feet, Gunn.— (FL 
Dec. to Feb.) B 
Distrib. Mountains of South-eastern Australia; elev. 6000 feet, Mueller. 
Stem succulent, erect, tufted, sparingly branched, 2 inches to a span high, of a red-brown colour, as is the 
