xviii synopsis. 
Order IV. HEXAGYNIA. 
318. Actinocarpus. Caps, combined at the base, radiating, 
6—8. 
Order V. POLYGYNIA. 
317. Alisma. Caps, many, clustered, distinct. 
Class VII. HEPTANDRIA. 
244. Trientalis. Cal. and cor. 7-parted. Style 1. Caps. 1- 
celled, 7-valved. 
Class VIII. OCTANDRIA. 
Order I. MONOGYNIA. 
* Flowers with calyx and corolla. 
59- Acer. Cal. inferior, 5-parted. Pet. 5. Fr. 2-winged. 
106. CEnothera. Cal. superior, 4-parted. Pet. 4. Seeds with- 
out hairs. 
104. Epilobium. Cal. superior, 4-parted. Pet. 4. Seeds hairy 
at the end. 
199. Chlora. Cal. inferior, 8-fid. 
190. Nat. Order 48. Ericaceae (in part). Cal. and cor. infe- 
rior, 4 — 5-fid. 
194. Vaccinium. Cal. and cor. superior, 4 — 5-fid. 
** Perianth single. 
261. Daphne. Limb of the perianth 4-fid, deciduous, inferior. 
Order II. DIGYNIA. 
257. Polygonum. Perianth single, inferior. 
120. Chrysosplenium. Perianth single, half-superior. 
Order III. TRIGYNIA. 
{Polygonum, N. O. 67.) 
OrderlV. TETRAGYNIA. 
138. Adoxa. Cal. 2-fid, cor. 4-fid in the terminal fl. ; cal. 3- 
fid, cor. 5-fid in the lateral fl. 
38. Elatine. Cal. 3 — 4-parted. Pet. 3 — 4. An th. terminal. 
301. Paris. Sep. and pet. 4. Filaments continued beyond the 
anth. 
