xlii 
LINNiEAN METHOD. 
Class XXII. DICECIA. 1 Stamens and pistils in separate flowers 
and on different plants. 
Order I. Monandria. 1 stamen. 
1. Najas. Barren fl. within a spatha. Germen with 1 seed. 
— Leaves simple- veined, p. 486. 
2. Salix. Spatha none. Germen with many seeds. — Leaves 
netted-veined. p. 397. 
Ord. II. Diandeia. 2 stamens. 
3. Salix. Scales of the catkin single-flowered, imbricate, with 
1 — 2 nectariferous glands at the base. Perianth 0. Stigmas 
2, often cleft. Caps, l-celled, 2-valved, many-seeded. Seeds 
comose. p. 397. 
Ord. III. Tri-Tetr-Pent-andria. 3, 4, or 5 stamens. 
* Sterile flowers not in catkins , or with a perianth besides the scale of 
the catkin. 
4. Valeriana. Cor. monopetalous. Stamens 3, upon the corolla. 
Germen inferior. Style 1. Stigma 3-fid. Fruit dry, 1 -seeded, 
crowned with the calyx expanded into a pappus, p. 200. 
5. Empetrcm. Perianth and bracteas of many imbricating scales, 
of which the 3 inner are often regular, spreading, and peta- 
loid. Filaments 3, long, inserted under the germen. Germen 
superior, globose. Style short. Stigma dilated, peltate, rayed. 
Fruit fleshy, 6— 9-seeded. p. 381. 
6. Rusccs. Perianth single, of 6 leaves. Filaments combined 
into a tube, bearing 3 sessile reniform anthers at the summit. 
Style 1, surrounded by a tubular nectary. Stigma 1. Germen 
superior, 3-celled, 6-seeded. Fruit fleshy, p. 448. 
7. Hippophae. Barren fl. collected into a small sort of catkin, 
each scale bearing a flower. Perianth single, of 2 roundish 
nearly distinct pieces. Anthers 3, linear, sessile. — Fertile fl. 
solitary. Perianth single, tubular, cloven at the summit. 
Germen superior, p. 394. 
S. Viscum. Cal. obsolete. Pet. 4, of barren fl. ovate, fleshy, 
united at the base, and bearing each a single anther, adnate 
with the upper surface ; of fertile fl. very minute. Germen 
inferior, p. 191. 
9. Rhamnus. Perianth double. Cal. urceolate 4-clcft. Pet. 4. 
Stam. 4, opposite to the petals ; filaments inserted upon the 
throat of the calyx. Germen superior, p. 93. 
10. Urtica. Perianth single ; of the barren fl. 4-leavcd, of the fer- 
tile 2-leaved. Stam. 4. Germen superior. Stigma 1, sessile, 
p. 390. 
1 From Ztt % twOy and oizo;, a house. 
