This appears to be a native of Australia by Brown's Prodromus.
4. P. densum. Close-leaved Pond-weed.
Sm. Eng. Fl. i. 230; Eng. Bot. 397; Hook. Fl. Scot. 58.
In ponds at Walker, N. In a spring near Manhaven, on the coast north of Whitburn, also in ponds at Hebburn, and the Skern, near Darlington, D.
5. P. fluitans. Long-leaved floating Pond-weed.
Sm. Eng. Fl. i. 230; Eng. Bot. 1286; Hook. Fl. Scot. 57; With. ii. 293; Gr. Fl. Eds. 40; P. rufescens, Hook. Br. Fl. 75.
In Whey Syke, on Teesdale Forest, D. In ditches communicating with Hell Kettles, near Darlington. Mr. E. Robson. In ponds on Alnwick, moor, N. — Mr. John Davison.
6. P. lucens. Shining Pond-weed.
Sm. Eng. Fl. i. 231; Eng. Bot. 376; Hook. Fl. Scot. 58; Gr. Fl. .Eds. 41; Berwick Flora, 41.
In Prestwick Carr, Crag Lake, and the lake at Dudley Shield; also in the mill-race at Hexham, in the Tweed above the Union Bridge, and a little below Coldstream, N. In the Whey-syke on Teesdale Forest, the river Skern, and ponds near Darlington, D.
7. P. crispum. Curled Pond-weed.
Sm. Eng. Fl. i. 233; Eng. Bot. 1012; Curt. Fasc. v. t. 15; Hook. Fl. Scot. 58; Berwick Flora, 41.
In ponds and rivulets.
8. P. compressum. Flat-stalked Pond-weed.
Sm. Eng. Fl. i. 233; Eng. Bot. 418; Hook. Fl. Scot. 58; With. ii. 295.
In ponds at Wide-haugh, near Dilston, N. In stells near Seaton, and in a pond near Darlington, D. — Mr. Backhouse.
9. P. pusillum. Small Pond-weed.
Sm. Eng. Fl. i. 235; Eng. Bot. 215; With. ii. 297; Gr. Fl. Eds. 41; Berwick Flora, 41.
In the loch at Holy Island, and in Prestwick Carr, N. In ponds at Lambton, and in Mordent Carr, D. About Norton and Stockton, D. — John Hogg, Esq. In the Aln, near Alnwick, N. — Mr. J. Davison.
10. P. pectinatum, Fennel-leaved Pond-weed.
Sm. Eng. Fl. i. 236; Eng. Bot. 323; Gr. Fl. Eds. 41; Berwick Flora, 42; With. ii. 295; Hook. Fl. Scot. 59; P. marinum, Linn. Sp. Pl. 184; Hudson, 76.
At Hell Kettles, near Darlington; in the river Wear at Chester New Bridge, near Lambton Ferry, and above Sunderland, D. In salt-water ditches near the
Tees. — John Hogg, Esq. In salt marshes near Hilton, D. — Rev. J. Symons. In a salt-water ditch called Meggy's Bourn, north of Seaton Sluice, N. In the Tweed and the lough at Holy Island, N Dr. G. Johnston.
64. RUPPIA.
1. R. maritima. Sea Ruppia, Tassel Pond-weed.
Sm. Eng. Fl. i. 237; Eng. Bot. 136; Hook. Lond. t. 50; FL Scot. 59; Gr. Fl. Eds. 42; With. ii. 297.
In Meggy's Bourn, north of Seaton Sluice, N. Near Tees Mouth, D Mr. E. Robson.
65. SAGINA.
1. S. procumbens. Procumbent Pearl-wort.
Sm. Eng. Fl. i. 238; Eng. Bot. 880; Curt. Fasc. iii. t. 12; Hook. Fl. Scot. 59; Berwick Flora, 42.
On walls and waste places, common. On the Fern Islands, N. — Dr. G. Johnston.
2. S. maritima. Sea Pearl-wort.
Sm. Eng. Fl. i. 239; Eng. Bot. 2195; Hook. Lond. t. 115; Gr. Fl. Eds. 42; Berwick Flora, 42.
On Hartlepool Pier, D. On Seaton Moor, D. — Mr. Janson. Between Holy Island Castle and the Heugh, N. On the Fern Islands. — Dr. G. Johnston.
3. S. apetala. Annual Small-flowered Pearl-wort.
Sm. Eng. Fl. i. 240; Eng. Bot. 881; Curt. Fasc. v. t. 14; Hook. Fl. Scot. 60; Berwick Flora, 43.
Near Sunderland, D. At Blackwell, D Mr. Backhouse. On the heights between Belford and Bamborough. — Thompson's Berwick Plants. On the walls at Fisher's Fort, Berwick. — Dr. G. Johnston.
66. MOENCHIA.
1. M. erecta. Upright Moenchia.
Sm. Eng. Fl. i. 241; M. glauca. Hook. Fl. Scot.; Sagina erecta. Eng. Bot. 609; Curt. Fasc. ii. 12; With, ii. 299.
In gravel pits on Durham Moor. — Rev. J. Symons. On Limestone hills, near Sunderland, D. — W. Weighell.
67. RADIOLA.
1. R. millegrana. Thyme-leaved Flax-seed.
Sm. Eng. Fl. i. 24 - 3; Eng. Bot. 893; Berwick Flora, 43; Hook. Fl. Scot. 60; Linum Radiola, With. ii. 435; Linn. Sp. PI. 402.
On Newcastle Town Moor, by the road leading to Benton, N. — Rev. Jas. Birkett, Sp. Near Berwick. — Dr. G. Johnston.
PENTANDRIA MONOGYNIA.
68. MYOSOTIS.
1. M. palustris. Great Water Scorpion-grass.
Sm. Eng. Fl. i. 249; Hook. Fl. Scot. 67; Berwick Flora, 51; Eng. Bot. 1973; Curt. Lond. Fasc. iii. 13.
In rivulets, mill-pools, ditches, &c.
2. M. caespitosa. Tufted Water Scorpion-grass.
Sm. Eng. Fl. i. 250; Berwick Flora, 51; Eng. Bot. t. 2661; Hook. Br. Fl. 83.
In dry ditches, and by ponds near Wallington, N. — W. C. Trevelyan, Esq. In the lane below Unthank Colliery, near Berwick. — Dr. G. Johnston.
3. M. sylvatica. Upright Wood Scorpion-grass.
Sm. Eng. Fl. i. 251; Hook. Fl. Scot. 66; Dill. Ray's Syn. 229, t. ix. f. 3 (good). Berwick Flora, 52.
In Castle Eden Dene, and near Middleton in Teesdale, D. Near Whitfield, also in Scotswood Dene and Twizell Castle woods N. In Wallington woods, N. — W. C. Trevelyan, Esq. In Horncliff Dene, N.— Dr. G. Johnston.
4. M. arvensis. Field Scorpion-grass.
Eng. Bot. 2629; Hook. Br. Fl. 85; Fl. Scot. 67; M. scorpioides α arvensis, Sm. Fl. Brit. i. 212.
β M. collina, Hook. Br. Fl. 85; M. arvensis, Eng. Bot. 2558; Sm. Eng. Fl. i. 252.
