Lobelia.) CAMPANULACES. 401 
Souru Isnanp: Shingle slopes on the mountains, not common. Nelson— 
Dun Mountain, Rough ; Wairau Gorge, Travers, T. F. C.; Waiau Valley, 
Travers. Canterbury—Mount Torlesse, Petrie! T. F. C.; mountains near the 
Broken River, Enys! 7. #'. C.; Mount Dobson, 7. #. C.; mountains at the 
head of Lake Ohau, Buchanan! Otago—Mount Ida, Mount St. Bathans, 
Mount Kyeburn, Petrie ! 3000-6000 ft. December—March. 
A most distinct species, quite unlike any other. It is remarkable for the 
corolla being twice split to the base at the back, so that the flower is 3-lipped. 
4. ISOTOMA, Lindl. 
Herbs of various habit. Leaves alternate, entire or toothed or 
pinnatifid. Flowers axillary or in terminal racemes. Calyx-tube 
adnate to the ovary; limb 5-partite. Corolla-tube cylindrical, 
entire or very shortly slit on the upper side; limb spreading, with 
5 nearly equal lobes. Stamens inserted about the middle of the 
corolla-tube; filaments connate above; anthers similar to those 
of Lobelia, the 2 lower ones tipped with one or several short 
bristles, the 3 upper naked. Ovary 2-celled; ovules numerous ; 
stigma shortly 2-lobed. Capsule 2-celled, loculicidally 2-valved 
within the calyx-lobes. Seeds numerous. 
A small genus of 6 or 8 species, most of them natives of Australia. It 
differs from Lobelia in the corolla-tube not being split to the base at the back, 
and in the stamens being affixed to the middle of the tube. The single species 
found in New Zealand is plentiful in south-east Australia and Tasmania. 
1. I. fluviatilis, /’. Muell. ex Benth. Fl. Austral. iv. 1386.—A 
small slender creeping and rooting perennial herb, often forming 
matted patches, glabrous or slightly pubescent; stems 1-4 in. long. 
Leaves shortly petiolate, +4in. long, oblong or obovate-oblong to 
linear-oblong, obtuse or subacute, entire or sinuate-dentate, rather 
thin and membranous. Peduncles axillary, 1-flowered, longer than 
the leaves. Flowers pale-blue, -4in. long. Calyx-lobes subulate- 
lanceolate. Corolla-tube not split at the back, longer than the 
calyx-lobes ; lobes linear-oblong, spreading. Stamens attached to 
the corolla-tube about the middle; the 2 lower anthers each tipped 
with a rigid bristle. Capsule oblong, 4in. long. Seeds smooth.— 
Lobelia fluviatilis, &. Br. Prodr. 563; Hook. f. Fl. Tasm. i. 238, 
t. 70. 
Sours Istanp: Nelson—Lower portion of the Buller Valley and marshy 
places near Westport, W. Townson! Mokohinou River, Rev. F. H. Spencer ! 
Canterbury—Broken River basin, Hnys! Kirk! T. F.C.; Lake Tekapo, 7. F. C. 
Otago—Macrae’s, Petrie ! Sea-level to 3000 ft. December—February. 
Probably an abundant mountain plant. In the absence of fruit it has been 
for many years confused with small forms of Pratia angulata, both in my own 
herbarium and in Kirk’s and Petrie’s, although the entire corolla-tube and 
epicorolline stamens ought to have been sufficient to indicate its proper posi- 
tion. 
5. WAHLENBERGIA, Schrad. 
Annual or perennial herbs. Leaves alternate or rarely oppo- 
site. Peduncles terminal or axillary, often forming leafy panicles. 
