CLASSES, ORDERS, AND GENERA. 
XXI 
9. CIIENOPODIACEyE. Perianth 5-cleft, or obscurely lobed. 
Fruita 1 -seeded utricle. — Terrestrial plants. (Salicornia, 
Chenopodium.) p. 358. 
10. Lemna. 1 Perianth monophyllous, membranous, urceolate. Fruit 
utricular.— Fresh- water minute floating plants, p. 477. 
11. CY PER ACEyE. Flowers glumaceous, imbricate. — Leaves 
with entire sheaths. (Ci.adidm and Rhynciiosfora.) p. *87. 
Ord. II. Digynia. 2 styles. 
12. Callitriche. Flowers solitary, axillary. Fruit of 4 cells and 
seeds. — Leaves opposite, p. 387. 
13. GRAMINE/K. Flowers glumaceous, imbricate. Fruit a 
caryopsis, 1-seeded. — Leaves alternate with split sheaths. 
(Anthoxanthum, Hierochloe, and Bromus.) p. 522. 
Class III. TRIANDRIA. 3 stamens. 
Order I. Monogynia. 1 style. 
* Perianth superior. 
1. VALERI AN ACEtE. Perianth double. Cor. gibbous at the 
base, 5-cleft. Fruit l-seeded. p. 199. 
2. IRIDACEiE. Perianth single, petaloid, 6-cleft, p. 439. 
-* Flowers inferior ( dry or glumaceous). Leaves parallel-veined. 
3. CYPERACEiE. Flowers each of a single glume, several im- 
bricate and forming a spikelet. Acliene l-seeded. — Leaves 
with entire sheaths, p. 487. 
4. GRAMINEiE. Flowers of 2 glumellas, with or without ex- 
ternal glumes. Caryopsis l-seeded. — Leaves with split 
sheaths. (Nardus, Sesleria, and Spartina.) p. 522. 
5. Jcncus. Perianth 6-partite. Caps. 3-celled, several-seeded. 
p. 460. 
*** Flowers inferior. Leaves netted-veined. 
6. Chenopodium. Perianth 5-cleft, p. 359. 
Ord. II. Digynia. 2 styles. 
7. GRAMINE.E, p. 522. 
Ord. III. Trigynia. 3 styles. 
8. Montia. Cal. of 2 leaves. Caps, solitary, 3-valved, 3-seeded. 
— Stipules none. p. 1 50. 
1 This genus, placed here by Linnasus, is really monoecious, and the supposed 
perianth is a spatha with one barren and one fertile flower. 
