— 29 — 



(1811) non Gmel., Fl. Bad., II, 99 (1806); Svensk. bot. t. 161; Fl. dan., t. 2347; Reich., Fl. 

 Germ., 570; Koch, Deutschl. FL, II, 616 et Syn., ed. II, 707; Wallr., Sched., 174; Sturm, 

 Deutschl. Fl., Heft 73, nr. 16 c. ic; Meisn. in DC, Prodr., XIV 1, 48 excl. /3.; Warren in 

 Journ. of bot. (1875), 6 ff.; Trimen, ibid., (1874) t. 140; Ruhm. in Jahrb. bot. Gart. Berlin, 

 I, 253. — R. aquaticus X hydrolapatliuni Mey., FI Hann., 468 (1849) {aquatico-hydrolapathum); 

 Hausskn. in Mitt. geogr. Ges. Thiir., HI (1885), 64; Murb. in Bot. Not. (1899), 10; Crepin, Fl. 

 Belg. fragm. V (1865). — R. acutus (i. latifoUus WahL, FL suec, 223 (1824). — R.aeutus 

 Schultz, Lc, 22 (non L.). — R. aquaticus v. heterophyllus G. F. W. Meyer, Chlor. Hann., 477 

 (1836). — Elatus. Folia basalia subcoriacea, oblonga vel oblongo-lanceolata, basi truncata sub- 

 cordata, saepius obliqua, apice sensim attenuata, in margine plana, — 70 cm longa, 16 — 22 cm 

 lata, in media latissima; caulina oblonga, acuta, in basi obliqua, ovata v. cordata; suprema 

 lanceolata. Inflorescentiae rami erecto-patentes. VerticiUi aphyUi. PediceUi sub media 

 articulati. Valvae triangulares, basi subcordatae vel truncatae, integrae vel basim versus 

 crenulatae, omnes caUis oblongis saepe inaequaUbus praeditae (steriles modo ecallosae), 

 7 — 8 mm longae lataeque. Bene fertiUs. 



R. aquaticus foUi latioribus, basi latissimis, eorum petioUs brevioribus, valvis mem- 

 branaceis, ecallosis, R. hydrolajyathum foliis angustioribus elongatis, basi attenuatis, valvis 

 subcoriaceis, magis acuminatis, lougioribus quam latis, bene caUiferis distinguuntur. 



Crescit in fossis, stagnis, saepissime inter parentes hinc inde autem R. aquatico absente, 

 sat frequens. Observatus est in Germania passim {pr. Erlangen det.). Austria; Bohemia, 

 Moravia (Briinn), Carinthia, Carnia, Galicia. Hungaria, Croatia, in Gallia, Europa boreaU, 

 Anglia, Rossia etc. Floret aestate. 



Exsiccatae: Fries, Herb. norm., VI, nr. 53; Schultz, Herb. norm., nr. 1219; Fl. GaU. 

 Gerni. exs., nr. 510. 



Tab. 169. R. heterophylliis Schultz. 3. Inflorescentiae fructiferae pars superior (dimin.). 

 4. FoUum radicale (dimin.). 5. Ramus fructifer. 6. Fructus fertUis, 7. sterilis. 8. Nux. 

 (6-8 +.) 



b) R. subhydrolapathum Schatz in Scbrift. Ver. fiir Gesch. u. Naturk. der Baar, VIH 

 (1893), 11 pr. f. FoUa valvaeque magis in R. hydrolapathum inclinantia. — Germania: 

 Baden pr. Greisingen et Gutmadinen (1. Schatz). 



c) R. Bastelaeri m. — R. maximus X hydrolapathum Van BasteLaer in BuU. soc. bot. 

 Belg., VI (1867), 369—380. — FoUa basaUa ovaU oblonga, basi obliqua sed varie formata. 

 Valvae iis R. hydrolapathi simUes, basi conspicue denticulatae. — Belgia. 



16. Rumex aquaticus x obtusifolius. — a) R. platyphylius F. Aresch. in Sv. Vet. Akad. 

 ofvers., XIX (1862), 73, t. lU, f. 7; Murb. in Bot. Not. (1899), 12. — R. Schmidtii Hausskn. 

 in Mitt. geogr. Ges. Thiir., UI (1885), 66 (exparte?). — R. HippolapatliumXohtusifolius 

 Jungn. in Bot. Not. (1885), 116, f. 7 (f. Murb.). — Folia basalia plus minus late-ob- 

 longa vel subtriangularia, basi cordata, ibidem latissima, apicem versus rotundata 

 V. obtusiuscula, in margine plana vix undulata. VerticiUi remoti. PetioU intus angusti et 

 canaliculati. PedicelU tenues, basim versus indestincte articulati. PerianthU phylla externa 

 patentes, dimidiam latitud. valvarum vix aequantia. Valvae triangulares, 5—7 mm longae 

 longiores quam latae, basi truncatae v. subcordatae, apice protractae, sublingulatae, 

 basim versus crenulatae v. denticulatae, una caUum humilem (nervum incrassatum) 

 gerens v. omnes ecaUosae. 



