First, second class. 
l 
II. Table for determining the genus. 
Cl. 1. Monandria. 
1. Aquatic pis with indistinct fls . ... 2 
— Land pis. 3 
2. Ls whorled. Style 1.Hippuris. 190. 
— Ls opp. Styles 2 Callitriche. 191. 
8. Style 1. 4 
— Styles 2. 5 
4. Ls opp. Cor. spurred (rose or red) . Centranthus. 278 
— Ls altern. Cor. 0 Alchemilla. 175 
5. Herbaceous pis. See Cl. 5, 138 . . . Blitum. 488. 
— Graminese. See Cl. 3, 40 ... Vulpia. 654. 
Cl. 2. Diandria. 
1. Lig. pis with opp. ls . . ... 2 
— Herbaceous pis ..... . .5 
— Gramineee or Glumacese ...... 13 
2. Pets 4 or 0. Ls pinnate . . . Fraxinus. 380. 
— Cor. gamopetalous, 4—8-fid. 3 
3. Cor. 5—8-fid. Ls pinnatisect . . Jasminum. 381. 
— Cor. 4-fid. Ls undivided ...... 4 
4. Fr. a drupe. Ls grayish white underneath Olea. 377. 
— Fr. capsular. Ls oval-cordate . - . Syringa. 379. 
— Fr. berry-shaped. Ls oblong-lanceolate . Ligustrum. 378. 
5(1).PI. composed of small fronds floating freely on the water 
Lemna. 535. 
— Pis with stems and ls ...... 6 
6. Seps 4. Cor. 0 ..... Lepidium. 67. 
— Cal. and cor. both present ..... 7 
7. Pets 2; deeply 2-fid ..... Circaea. 187. 
— Cor. gamopetalous. ....... 8 
8. Cor. spurred, bilabiate or personate .... ,9 
— Cor. not spurred . . . . . . .10 
9. Cal. 5-partite. Fls violet or white, solitary. Ls non divided, 
in rosettes. Marsh pis ... Pinguicula. 466. 
— Seps 2. Fls yellow, 3 — 10. Ls capillary-multifid, root¬ 
like, with air-bladders. Aquatic pis Utricularia. 467. 
10. Ovary 4-partite. 4 achenes. (Ls opp.) . . . 11 
— Ovary undiv. Caps. 2-celled ..... 12 
11. Cor. 4-fid (lobes almost equal) . . Lycopus. 437. 
— Cor. bilabiate ..... Salvia. 438. 
12. Cor. rotate (gen. blue), 4-fid, one lobe rather larger, 
ebracteate ...... Veronica. 423. 
— Cor. tubular-infundibuliform (whitish), bilabiate—4-fid, with 
2 bracts like the cal.-lobes . . . Gratiola. 421. 
