31. HALORAGE/E. 
117 
petioles fiat with memhnmous wings, bracteoles setaceous, pet. 
bifid : lobes oblong, eal. glabrous, “ ovary 1 -celled.” — E. B. 1057. 
St. 23. 2. — Usually glabrous. Pet. shorter than the inembra- 
no\is sej)als, narrow below. l*'r. soon falling. Bracteoles tleci- 
duous. — (i. intermedia (DC.) ; tl. larger, sej). less membranous 
equalling the petals. Whole plant much larger. C. intermedia 
(Ehrh.) Koch. — Woods and thickets in mountainous districts. 
P. VII. VIII. 
Order XXXI. IIALORAGEvE. 
Cal. adnate with the ovary, limb minute. Pet. minute, from 
the throat of the calyx or 0. Stain. 1 — 8 inserted with the 
jietals. Ovary of 1 or more cells. Styles equal in number to 
the cells. Fruit dry, not bursting, usually crowned with the 
rim of the calyx. Seed pendulous with a small quantity of albu- 
men. 
1. Myriophyllum. Monoecious. Cal. 4-parted. Pet. 4, 
fugitive, longer than the caly.x in the male, small and re- 
flexed or 0 in the female. Stain. 8. Styles 4, villose. Fr. 
tetragonal, sejiarable into 4 hard nuts. — G. F. G. Monochl. 3. 
2. IIippuRis. Calyx-limb very minute, obsoletely 2-lobed. 
Pet. 0. Stain. 1. Style filiform, lying in a channel of the 
anther. Stigma simple, acute. Fruit a 1-cellednut. — G.F.G. 
Mouochl. 2. 
3. Callitriche. FI. without cal. or cor., usually with 2 
bracts at the base. Stam. 1. Ovaries 2, each of 2 lobes 
and imperfectly 2-celled. Styles 2, subulate. Fr. dry, 
separating into 4 indehiscent carpels. — Kiitzing figures and 
describes a fugacious inferior 2-parted minute caly.x as some- 
times found. R. Icon. t. 880. — G. F. G. Monochl. 4. 
1. Myriophyllum Xfww. Water Milfoil. 
1. M. verticillatum (L.); fi. all axillary whorled, bracts pin- 
natifid. — E. B. 218. — L. whorled pinnatifidly divided into se- 
taceous segments. Bracts longer than the flowers, piunatifid or 
pectinate. — Ponds and ditches, rare. P. VII. VIII. 
2. M. spicatum (h.)-, fi. whorled forminy a leafiess spike, hr&cts 
small entire, spike erect when in bud. — E. B. 83. — L. 4 in a 
whorl, submersed. — Ponds and ditches. P. VI. VII. 
3. M. alternifiorum (DC.) ; sterile fl. alternate about 6 form- 
ing a leafless spike, spike nodding when in bud afterwards erect, 
fertile fi. about 3 together in axillary whorls at the base of the 
