EUMEX. 359 



principally tubercled, 1. oblong-lanceolate acute, lower 1. slightly 

 cordate below. R. pratensis E. B. S. 2757. St. and whorls 

 often tinged with dull red. Whorls near together but not 

 crowded, mostly leafless. Unopened aiith. white. Nuts elliptic, 

 abundant. One enlarged pet. larger than the others, sometimes 

 all 3 equally tubercled. [Said to be the hybrid E. obtusifoliusX 

 crispus.~] Marshy places, rare. P. VI. IX. E. S. I. 



9. R.cris'pus (L.) ; enlarged pet. cordate entire or crenulate 

 one principally tubercled, 1. lanceolate acute wavy crisped. 

 E. B. 1998. Height 23 feet. St. and whorls sometimes 

 tinged with bright red. L. narrowed or truncate below. Nut 

 elliptic. Enlarged pet. equal, sometimes, var. trigranulatus (Sy. ), 

 all equally tubercled. [Var. subcordatus (Warr.) has enlarged pet. 

 broader, more or less deltoid. The hybrid E. crispusXaqnaticus 

 (E. propinquus Aresch.) occurs in Scotland]. Hoadsides, n'elds, &c. 

 P. VI. VIII. Curled Dock. E. S. I. 



[R. elongatus (Guss.); enlarged pet. ovate entire one tubercled, 

 1. linear-lanceolate narrowed at both ends not wavy nor crisped. 

 J. ofB. xi. 237. St. 1 2i ft. high. Rt.-l. 812 in. long, 

 1 in. broad. Of lax habit with distant whorls. A probable 

 form of R. crispus. Surrey side of Thames between Putney 

 and Hammersmith, and Wye at Tintern.] 



10. R. aquat'icus (L.) ; enlarged pet. broadly cordate membra- 

 nous entire or w r avy without tubercles, 1. lanceolate, lower 1. some- 

 what cordate, petioles semicylindrical flat and finely margined 

 above. E. B. 8. 2698. R. domesticus Hartm. R. longifdius 

 DC. Height 3 4 feet. L. very large. Whorls crowded, 

 mostly leafless, forming a large dense lobed panicle. Nut elliptic. 

 In the North of E. and in S., preferring spots liable to be 

 flooded. P. VII. VIII. E.S. 



11. R. Hydrolap' atheum (Huds.) ; enlarged pet. ovate-trian- 

 gular nearly entire all tubercled, I. lanceolate acute tapering below, 

 petioles flat but not with raised edges. E. B. 2104. St. 3 5 

 feet high. L. often more than a foot long, sometimes cordate 

 at the base. Whorls crowded, mostly leafless. Nut elliptic. 

 Ditches and river-sides. P. VII. VIII. Great Water-Dock. 



E. S. L 



12. R. maximus (Schreb.) ; enlarged pet. triangular-cordate 

 denticulate below all tubercled, radical I. oblong-acute obliquely 

 cordate below, petioles flat or broadly channelled above with 

 raised edges. St. 73. 16. J. of B. xii. t. 140. St. 35 feet 



