30. HALORAGACE^. 137 



4. ClRCiB'A Linn. 



1. C. lutetidna (L.) ; i.ocaie or slightly cordate below repand- 

 denticulate opaque, petioles subterete, bracieoles 0, pet. deeply 

 emarginate, lobes broadly obovate, cal. bairy, ovary 2-oelled, fr. 

 broadly obovate.—^. £. 1056. St. 23. I.— Pet. as long as tbe 

 herbaceous sepals, broad below. Fr. persistent. — ^Woods and 

 hedge-banks. P. VI.— VIII. Enchanter's Nightsliade. E. S. I. 



_ 2. C. alpina (L.) ; I. cordate acuminate repand-dentate shi- 

 ning, ^efo'ofes^oji! with membranous wings, bracteoles setaceous, 

 pet. bifid, lobes oblong, cal. glabrous, ovary 1-celled. — U. B. 

 1057. St. 23. 2.— Usually glabrous. Pet. shorter than the 

 membranous sepals, narrow below. Fr. soon falling. Bracteoles 

 deciduous. — j3. C. intermedi(^(Ehxh.^ ; fl. larger, Sep. less mem- 

 branous eq-ualling the , petals. Whole plant much larger. — 

 Woods and thickets in hiUy districts. P. VII. VIII. E. S. I. 



Order XXX. HALORAGACE^. 



Oal. adnate to the ovary, limb minute. Pet. minute, from 

 the throat of the calyx. Stam. I — 8, inserted with the petals. 

 Ovary of 1 or more cells. Styles equal in number to the cells. 

 Fr. dry, not bursting, usually crowned with rim of calyx. Seeds 

 pendulous ; albumen fleshy. — Stip. 0. 



1. Myeiophylltim:. Monoecious. Cal. 4-parted. Pet. 4, 

 soon falling, exceeding the calyx in the male, small and 

 reflexed or in the female. Stam. 8. Styles 4, villose. 

 Fr. tetragonal, separable into 4 hard nuts. 



2. HiPPTjEis. Calyx-limb very minute, obsoletely 2-lobed. 

 Pet. 0. Stam. 1. Style filiform. Stigma simple, acute. 

 Fruit a 1-celled nut. 



1. MyKioPHTi,'LTJM Linn. Water-Milfoil. 



1. M. verticilldtum (L.) ; Jl. all axillary whorled, bracts pin- 

 natifld. — E. B. 218. — ^L. whorled, pinnatifidly divided into se- 

 taceous segments. Bracts more or less longer than the flowers, 

 pinnatifld or {M.pectinatum DC) pectinate. — Ponds and ditches, 

 rare. P. VII. VIII. E. I.. 



2. M. spicdtum (L.) ; Jl. whorled forming a kafless spike, 

 bracts small entire, spike erect when in bud. — E. B. 83. — L. 4 

 in a whorl, submersed. Lower bracts often pectinate. — Ponds 

 and ditches. P. VI. VH. E. S. I. 



