103 FOUMS AND DISTRIBUTION OF BATRACHIUM.
27. ElONTI.
R. Rionil, Lagger in Flora, vol. xxxi. i. pp. 49, 50 (1848). Batra- chium Rionii, Nyman, Syll. Fl. Europ. p. 174 (1854-55). R. BanJuni, var. nutans, Tauscli in Flora, vol. xvii. ii. p. 526 (1834). ^
Occurs in Sweden (teste Hartmann), Switzerland, N. \Y, India (Edgewortli !), and Afghanistan (Griffith!).
R. flaccidus, Pers. in XJsteri Annal. vol. xiv. pp. 38, 39 (1795). R. aquatlUs, /8. capilUfoUtis, Kunth, Fl. Berol. vol. i. p. 14 (1838). Forms 28-31.
28. CONFERVOIDES.
R. confercoides. Fries, Sura. Yeg. Scand. vol. i. p. 139 (1846). Ba- tracJi'mm conferva ides, Fr. Bot. Not. An. 1845, p. 121. R. paucistami- tieiis, var. borealis, Beurl. Bot. Not. 1852, p. 156.
Occurs in Iceland (Paulson !), Finland, Norway, Lapland, Sweden, Abyssinia (Schimper ! sect. ii. 1304 part, approaching Drouetii), Pend Oreille River, Washington, U. S. (Dr. Lyall !), Lake Winnipeg (Douglas !). A curious bifurcation occurs at the apex of a peduncle on a specimen from Alatan Mountains, Russia in Asia. R. aquatilis, y. snjannms, Regel and Radde in Regel, Bot. Ost-Sibierien, vol. i. p. 39 (1861), "in alpibus Sajanensibus," is rather a larger form. Var. eradicatus, Loestad. (1842) : " pusillus, floribus minimis, foliis omnibus tenuissime capillaceis. Sub ipsa aqua. Floi'et in Lapponia arctica." Butrachium eradicatum, Fr. (name only) in Bot. Not. 1843, -p. 114.
29. Drouetii.
R. Drouetii, F. Schultz,' teste Godr. in Gren. and Godr. Fl. Fr. vol. i. p. 24 (1848). BatracJunm Drouetii, Nym., Nya Bot. Not. An. 1852, p. 98. R. affinis, F. Schultz in Fl. vol. xxiv. ii. p. 558 (1841), non R. Br., was a name given provisionally, in order to secure priority of publication for some supposed new species ; I can find no more information about it, but very possibly the plant subsequeutly named Drouetii was lueant.
Occurs in Sweden, Norway, Scotland, England, France, Switzerland, Prussia, Austria, Tyrol, Piedmont, Sicily, Savoy, Turkey in Europe, Westphalia, Caucasus, Turcomania, India, Abyssiuia (Schimper! sect. ii. n. 1304, part), S. Africa (Ecklon ! ; form approaching confervoides) , Aleutian Isles, British Columbia (Wood !), Lower Frazer River, Colum- bia (Dr. Lyall !), Cascade Mountains, U. S. (Dr. Lyall ! ; one piece difl'ers by presence of floating leaves), Bolivia, S. America (Mandon ! 873 ; alt. 3900 metres ; elongated state). R. lidulentus, Song, and Perrierin Billot, Annot. Dec. 1859, is a pale green state, with slender leaves, and with the habit of confervoides ; it occurs in Savoy and Switzerland, 7000 ft. alt. Some British specimens are very close to it. Yar. cabomboides ; an elongated plant, collected by Guun in Lake River, Grindelwald, and at Formosa, Tasmania, where it grows among pebbles, at the bottom of the stream in a matted mass. It flowers under the water. A similar form from Sinaja Sorka is in Hb. Pallas.
30. SUBMERSUS.
R. aquatilis, var. snbmersus, Godr. in Gren. and Godr. in Fl. Fr. vol. i. p. 23 (1848). R. heterophyllus, Bab. part (1855). R. aquatilis, e. homoiophyllus, Boreau, Fl. Cent. Fr. ed. 3. vol. ii. p. 11 (1857). R. aquatilis (R. submersus), Carion, Cat. Saone et Loire in Bull. Soc. Bot. France, vol. vi. p. 498 (1859).
Occurs in England, Ireland, Armenia, Syria, Bucharia, India, South
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