Drosera. | DROSERACEZ:. 147 
in the ground. Stems leafy, erect, flexuose and wiry, simple or 
sparingly branched, perfectly glabrous, usually 6-18in. high but 
sometimes much longer and almost climbing. Radical leaves rosu- 
late, sometimes reduced to linear scales ; blade orbicular or reniform, 
glandular ; petiole short, broad, flat. Cauline leaves alternate, on 
longer filiform petioles, peltate; blade tin. diam., broadly lunate, 
the two angles with glandular-ciliate appendages, margins fringed 
with long glandular hairs. Flowers +-4in. diam., pink, in terminal 
3-8-flowered racemes. Sepals 5, oblong, entire or minutely toothed. 
Petals twice as long as the sepals, obovate or obcordate. Styles 3, 
divided to below the middle into numerous dichotomous lobes.— 
Hook. f. Fl. Nov. Zel. i. 21; Handb. N.Z. Fl. 64; Benth. Fi. 
Austral. 1. 465; Kirk, Students’ Fl. 146. D. circinervia, Col. in 
Trans. N.Z. Inst. xxvi. (1894) 314. D. stylosa, Col. l.c. xxviii. 
(1896) 593. 
NorruH anp SoutH Isuanps: Abundant as far south as Banks Peninsula. 
Sea-level to 1500 ft. ‘November—January. Also plentiful in Australia and. 
Tasmania. 
OrnpER XXVII. HALORAGEA. 
Herbs, often aquatic, rarely undershrubs. Leaves opposite, 
alternate, or whorled, when submerged often pectinately pinnatifid ; 
stipules wanting. Flowers hermaphrodite or unisexual, always 
small and often incomplete. Calyx-tube adnate to the ovary; lobes 
2,4, or wanting. Petals 2, 4, or wanting, valvate or slightly imbri- 
cate. Stamens 2 or 4-8, rarely 1 or 3, large, epigynous; filaments 
short, filiform; anthers 2-celled. Ovary inferior, compressed, 
angled or ribbed, rarely 2-4-winged, 2- or 4-celled, rarely 3-celled ; 
styles 1-4, distinct ; stigmas papillose or plumose ; ovules as many 
as the styles, pendulous, anatropous. Fruit small, dry or succu- 
lent, 1-4-celled, indehiscent or separating into 1-4 indehiscent 
carpels. Seeds solitary in the cells, pendulous; albumen fleshy, 
usually copious ; embryo cylindrical, axile. 
A small order of mostly inconspicuous plants, many of them water-weeds. 
Genera 8 or 9; species from 80 to 90. I have followed Hooker and Bentham in 
keeping Callitriche in this order, but it must be admitted that it has equal 
claims to be placed among the Monochlamydee. Of the 4 New Zealand 
genera, Haloragis is mainly Australian, but extends northwards as far as Japan ; 
Myriophyllum and Callitriche are almost of world-wide occurrence ; while 
Gunnera belongs to the south temperate zone. 
Terrestrial. Calyx 4-lobed. Stamens 4-8. Petals val- 
vate. Fruit nut-like, undivided as or 
Aquatic. Calyx-lobes obscure. Stamens 4-8. Petals im- 
bricate. Fruit separating into 2-4 nut-like carpels 
Subaquatic or terrestrial. Stamens usually 2. Fruit a 
j-seeded drupe a Gs sn . 
Aquatic or subaquatic. Stamen1. Styles2. Seeds 4 
1. Hatoraais. 
. MyriopHyLLum.. 
2 
3. GUNNERA. 
4, CALLITRICHE. 
