318 



LXXXIII. POLYGONEJl. 



Perianth inferior, 

 seed. Styles 2 or 3. 

 stipules. 



3- 5- or 6-parted. Stamens inserted in its base. Ovary of 1 ceU and 1 

 Fruit not bursting. Embryo inverted. L. alternate, with sheathing 



698. RUIMEX. 



A. Flowers complete. Sepals not reflexed. 

 i. Sepals strongly toothed at base. Sp. 1-7. 

 ii. Sepals nearly eutii-e. Sp. 8-16. 



S. Flowers complete. Sepals reflexed. Sp. 

 17, 18. 



C. Flowers monoecious. Sepals united. Sp. 

 19. 



S. Flowers separate. Sepals free. 



i. Flowers polygamo-monoecious. Sp. 20. 



ii. Flowers dioecious, none of them com- 

 plete. 



a. Joinings distant from calyx. Sp. 21 

 -26. 



b. Joinings close to calyx. Sp. 27, 28. 



A. Flowers mostly complete. Sepals not re- 

 flexed. Joining of pedicel far from 

 flower. 



i. Sepals strongly dentate at base. 



1. su£Focatu5. Almost stemless. Sep. 

 oblong ; all beaded, dentato-ciliate. Root- L. 

 oblong, somewhat cordate, acute. Rac. short, 

 leafy at base. p. 5. Salt marshes and rich 

 shade. Sardinia. 



2. maritimus. Sep. somewhat triangular; 

 all beaded. Setiform Teeth as long as the 

 apex. Whorls crowded. L. Hneari-lanceolate. 

 p. Sm. b. Koch and Duby. Marshes near 

 the sea. Fr. G. Br. rare. Also in Lorraine. 



3. palustris. Sep. ovate, prolonged, acute ; 

 all beaded. Teeth setiform, shorter than apex. 

 L. lineari-lanceolate. "Whorls separate, p. or 

 b. 7, 8. Marshes, occ. 



4. Steinii. Sep. ovate, all beaded. Teeth 

 setiform, shorter than apex. Whorls remote ; 

 upper leafless. Lower L. broadly oblong, cor- 

 date at base ; upper lanceolate, p. 7, 8. Banks 

 of the Maine at Frankfort. Has the habit of 

 R. acutus. 



5. pratensis. Sep. all beaded, somewhat 

 cordate; one larger, and with larger bead; 

 (with a small, entire, triangular point. Teeth 

 triangular, acuminate, Bab.) Lower L. ob- 

 long, acute, cordate at base; upper lanceolate. 



Whorls crowded, leafless, p. 7, 8. Rich mea- 

 dows. Eng. Rhine. Halle. 



6. obtusifolius. Sep. triangulari-oblong, 

 entire at top, one chiefly beaded. Apex beyond 

 the teeth, oblong or Ungulate. Lower L. cor- 

 date ; upper lanceolate. Branches nearly erect. 

 p. 7, 8. Meadoios and about villages. 



7. pulcher. Sep. ovato-oblong, all bead- 

 ed; one wath a large bead, ciliato-dentate. Root- 

 L. fiddle-shaped. Branches divaricate. Rac. 

 leafy, p. orb. 6. JJncult. Br. Fr. G. rare. It. 



j3. divancatus. L. cordato-oblong, downy 

 beneath. 



A specimen I gathered at Home in 1832 

 has long, rod-liJce, nearly leafless racemes, and 

 6 or 8 long teeth on each of the Sepals. It 

 appears to be a different species, but unfortu- 

 nately the L. are wanting. 



ii. Sepals entire or very nearly so. 



8. acutus. Sep. oblong, all beaded. L. 

 oblong, cordate at base ; upper lanceolate. 

 Whorls remote, leafy, p. 7, 8. Banks and 

 uncult. In this and the following, the join- 

 ing is qtdte at the base of the pedicel. 



9. sanguineus. Sep. oblong ; 1, at least, 

 beaded. Lower L. oblonsc, cordate at base ; 

 middle ovato-lanceolate, acute. Whorls mostly 

 leafless, p. 7, 8. Moist shade. Br. Fr. G. 



a. With bloody veins, occ. 



10. nydrolapatbum. Sep. ovato-trian- 

 gular. Beads oblong. Root-L. lanceolate, or 

 ovato - lanceolate, but somewhat attenuate. 

 Lower Stalks flat. Whorls somewhat crowded. 

 p. 7, 8. Still water. 



11. maximus. Sep. triangulari-cordate, 

 denticulate at base, all beaded. Lower L. ob- 

 long, acute, obliquely cordate at base. (Stalks 

 flat, with a prominent rib on each side, Koch.) 

 Whorls leafless, p. 7, 8. Still water. G. 



12. Fatientia. Sep. subrotundo-cordate ; 

 one only with a globose bead. Lower L. cor- 

 dato-lanceolate. (L.'-stalks channeled, Koch.) 

 Whorls crowded, leafless, p. 7, 8. Sandstone 

 hills. Mutzig in Lorr. Alps of Pdm. lower 

 Austria. 



13. crispus. Sep. very broad, somewhat 



