FORMS AND DISTRIBUTION OF BATRACHIUM. 69 



Helvet. ed. 2. p. 13 (1843). Forms 9-12.— Fig.— Cosson and 

 Germ. Atl. t. 1. f. 5, 6. 



R. Petiveri, a. minor, Koch, 1. c. H. Petiveri, Koch in 

 Sturm. Deutschl. Fl. llf. 82 tig. (1840). Forms 9-11. 



9. HOLOLEUCUS. 



R. ololeiicos, Lloyd, Fl. Lorr. p. 3 (1844). PatracJdum ololencos, Van 

 den Bosch, Fl. Bat. Prodr. 6 (1850). 



Occurs in Belgium, France, Spain, Portugal (teste Machado), Holland 

 (in Fl. Bat. Prodr. p. fi). A Portuguese specimen (Welwitsch ! Fl. 

 Lusit. Exs. 906, 600U ft. alt.) probably belongs to this form. 



Intermediate between tripartltm (tlian which the flowers are larger) 



and co)ifusus. The only good character to distinguish it is the absence 



of the yellow colour from the base of the petals. The stipules are wide, 



spreading, and very shortly adnate to the petioles, and the carpels are 



glabrous. It has not yet been noticed in Britain, but ought to be looked for. 



Batrachium oblusijtoriim, S. F. Gray (1821). R. tripar- 



tilus, j3. ohtitfiijlorns, Ue Cand. (1818). R. BnudotU, Syme 



in Sowerl). Eng. Bot. ed. 3. p. 24 (1863). Forms 10, 11. 



A state with quite glabrous receptacle Avas notieed near 

 St. Petersburg by Kuprecht, which he called var, psilocarpa, 

 ■ Fl. Ingr. p. 22 (1860). 



10. CONFUSUS. 



R. tripartilus, Nolte Novit. Fl. Holsat. p. 51 (1828). R. co?if/tsn/i, 

 Godr. in Gren. aiul Godr. Fl. Fr. vol. i. p. 22 (1848). Batruchnnii 

 confiitiKm, F. Schultz. R. Kochii, Beurl. Bot. Not. 1852, p. 156. R. 

 Banchtii, y8. confusus, Syme in Sowerb. Eng. Bot. ed. 3. p. 25. t. 23 

 (1863). Batrachium tripartitum, Schur, En. PL Transsilv. 12 (1866). 

 — Fig.— FL Dan. t. 1993. 



Occurs in Sweden, Denmark, Scotland (teste Syme), England, Wales, 

 France, Germany, Holstein, Sleswig, Switzerland, Sicily (Parlatore !), 

 Algeria (?). Portions without floating leaves resemble sahii(jinosi(s or 

 trichophyUns. Slates with large flowers approach R. peltatHS, Schrank ; 

 other states in brackish water cannot be separated from Batidutii. 



11. Baudotii. 



R. Baudutii, Godr. Essai, f. 4 (1839); Eng. Bot. Suppl. t. 2966. 

 Batrachium Baudotii, Van den Boseh, Fl. Batav. Prodr. p. 7 (1850). 

 R. Baudotii, a. vidgarin, Syme in Sowb. Eng. Bot. ecL 3. p. 25 (1863). 



Occurs in Scandinavia (?), Scotland, England, Wales, Ireland (teste 

 Moore and More), France, HoHand, Prussia, Spain, Portugal (teste 

 Machado), Algeria. I have a state between this and R. pellatus, Schrank., 

 from Northumberland. This plant when it is deprived of its floating 

 leaves resembles or becomes mariuus. In England, Jit least, Baudotii is 

 marine or found only m brackish water. 



12. TRIPUYLLUS. ' 



R. triphi/llos, Wallr. in Linna>a, vol. xiv. p. 584 (1840). R. Petiveri, 

 (3. major, Koch, Syn. Fl. Germ, et llclvet. ed. ii. p. 13 (1843). R. he- 

 terophyllus. Pries (part) (1845). Batrachium hcteruphijllum. Fries (part) 

 (U46). R. aqiiatilis, var. 8. tripartitus, Koch in Sturm. Deutschl. Fl. 

 H. p. 67. f. (Ib35). R. Friesii, lieurl. J5otan. Notis. 1852, p. 156, non 

 Hartm. 



[Ekratum. — In tlie flironological list, p. 48, insert, — 

 18()5. lutcoluiii, Uevel, llccli. Bot. Sud-ouest P^'aiice. — La Teste, S.W. 

 France.] 



(21* be uontiiiued.) 



