626 | HALORAGIDACHAE, [| Myriophyllum. 
A. Hamilton. Canterbury—Lake Grassmere, 7. Kirk! J. B. Armstrong. Otago— 
Taieri Plain, Inch-Clutha, Catlin’s, Lumsden, Roxburgh, &c., Petrie/ Bluff Hill, 
T. Kirk! Wake Hauroko, Crosby Smith. Srewart Istanp: Thomson, T'. Kirk! 
Cockayne. Sea-level to 3500 ft. 
This is a somewhat critical species, which can only be distinguished from M. pedun- 
culatum by the smaller size, shorter and proportionately broader leaves, and by the 
more numerous male flowers. 
3. GUNNERA Linn. j7l7. 
Stemless herbs with creeping rhizomes, often forming broad matted 
patches. Leaves all radical, petiolate, ovate- or rounded-cordate, coriaceous 
and fleshy. Flowers small, unisexual or rarely hermaphrodite, in simple 
or branched spikes or panicles. Male flowers: Calyx-tube imperfect or 
wanting; lobes 2-3, minute. Petals 2-3 or wanting. Stamens 2-3; 
filaments filiform; anthers large. Female flowers: Calyx-tube ovoid; lobes 
2-3, small. Petals 2-3 or wanting. Ovary 1-celled; styles 2, rarely 4, 
linear, papillose, stigmatic from the base ; ovule solitary, pendulous. Fruit 
a small fleshy or coriaceous drupe ; seed adherent to the pericarp : embryo 
very minute. 
About 30 species are known, nearly 20 of which are found in South America, 
ranging from Mexico to Chile, Juan Fernandez, Fuegia, and the Falkland Islands. 
Hight species are endemic in New Zealand, and there are also outlying species in South 
Africa, Tasmania, Java, and the Sandwich Islands. Several of the American species 
are remarkable for the large size of their leaves, particularly the Juan Fernandez 
’ G. masafuerae, in which the leaves are said to be sometimes 10 ft. in diameter. The 
New Zealand species are still much in need of a thorough revision, which should be 
based as far as possible upon a study of the various forms in a living state. 
* Scapes bisexual; female flowers at the base. 
Leaves orbicular-cordate or reniform, usually broader than long, 
dentate-serrate .. rt be * Ae .. L. G. monoica. ~ 
Leaves orbicular-cordate or ovate-cordate, usually longer than 
broad, crenate-serrate, strigose 
Et om rf, Pe G. strigosa. 
Leaves thin, ovate-cordate. Scapes tall, branched, lax-flowered .. 
. G. mixta. 
wo be 
** Scapes unisexual, 
Variable in size, 2-10in. Leaves ovate or oblong. Fruiting-scapes 
usually exceeding the leaves. Drupe obconic va .. 4. G. prorepens. 
Leaves orbicular-cordate, sharply and minutely toothed. Scapes 
shorter than the leaves. Drupes 3}, in., oblong a an . G, densiflora. 
Leaves narrow-ovate to lanceolate, acute, cuneate at the base, 
coarsely dentate .. a oe es 1% .. 6. G. dentata. 
Leaves thick and fleshy, broadly ovate, obtuse, cuneate at the base, 
crenate-lobed Ay in ~ at: vr -. 7. G. arenarta, 
Very stout and coriaceous. Leaves deltoid-ovate, minutely toothed, 
cuneate at the base es 7. e, ‘ .. 8. G. Hamiltoni. 
Or 
1. G. meonoiea Raoul in Ann. Scr. Nat. Ser. iii, 2 (1844) 117.—A small 
perennial herb, spreading over the surface of the ground and forming 
matted patches. Rhizome perennial, putting out from the nodes creeping 
and scaly hirsute stolons; roots fibrous, tomentose. Leaves radical and 
rosulate, long-petioled ; petiole $-14 in. long, usually 4 or 5 times as long as. 
the blade, more or less clothed with appressed hairs. Lamina tounded- 
cordate or reniform, 4-lin. broad, usually broader than long, obsoletely 
3-5-lobed, irregularly dentate-serrate, upper surface thinly hairy, lower 
surface more so on the veins and margins. Flowers monoecious, on a 
common peduncle 1}-2in. long; males occupying the upper ? of the 
