Sparganium natans L. (S. minimum (Hartm.) Wallr.) Conservation status: C First record: Dr Thomas Manningham, 1746 29 Whittlesea, AF.ann. 44 Sparganium natans Floating Bur–reed. Stream by the Edge of Sawston Moor. Relhan,1802;1820,376. Sawston Moor; Relhan. Bab.1860,245. S.minimum In and about the Peat holes on Triplow Moor near Ninewells Relhan, Maynard MS.13:358,CRO. Peat–holes, Triplow. Bab.1860,245. Near Cambridge, CC Babington, n.d., E. 45 Sparganium minimum JB. The least Bur–reed. In Stagnis & Rivulis, sed rarius. It is found in the standing Waters about Hinton,... Moors, Cambridgeshire. Dr Thomas Manningham. Blackstone,1746,94. 'and in several running waters near Cambridge.' Relhan in litt. to Smith, 5.9.1800, LINN. 47 Aldreth. Bab.1860,245. By bridge over drain with engine near Earith on Willingham–Earith Rd. 6.8.1925, Mills ann. 55 ... and Feversham [sic] Moors, Cambridgeshire. Dr Thomas Manningham. Blackstone,1746,94. –––––––––––––––– S. natans Floating Bur–reed. Wilbraham Moor. Relhan,1788. Wilbraham Moor. Relhan,1802;1820. Wilbraham Moor. Jenyns ann.Relhan,1802. In my way from Cambridge to Bottisham this morning,... On the borders of Wilbraham Moor, however I found Sparganium natans– about half a dozen plants– but nearly out of flower. This is not a common species. It is much smaller than either... The radical leaves float upon the surface of the water. Jenyns,JNH,28.8.1824. Wilbraham Moor. abundant. Henslow ann. 2:377. Wilbraham Fen. Bab.1860,245. 56 I have now sent you a few aquatics bro't today from Burwal Fen... Sparganium Natans,...Newmarket, 3.7.1794, Hemsted in litt. Sowerby 26:165. Gathered by Mr Hemsted near Newmarket. n.d., conf. CD Preston 1993. Hort.Sicc.7:WBCH. Sent by the Rev. Mr. Hemsted from Burwell fens, Cambridgeshire. Smith,Eng.Bot. (1795) 4:273. Burwell Fen. Relhan,1802;1820. Burwell–fen, JS Henslow, 28.6.1825, CGE. Burwell Fen, L Jenyns, 16.7.1825, CGE. Sparganium natans was found in two or three spots,– in ditches about the middle of the fen:– [Burwell] To the leaves of this last plant adhered young specimens of Sponge– of the same species as that which we have procured on former occasions from Bottisham & Swaffham Fens. Jenyns,NHJ,25.7.1826. Burwell Fen. abundant. Henslow ann. 2:377. Burwell Fen, J Downes, 1829, CGE. Burwell Fen CE Broome 31.7.1832, NTM. Burwell, Hb JA Power, 30.8.1836, det WH Beeby, RTE. Burwell Fen, n.c., n.d., SWN. Burwell fen, Gibson,1848,310. Burwell, Fen. Bab.1860,245. Burwell Fen, AS Shrubbs, 20.7.1881, CGE. Upware. JE Lousley, 1923 [? error for 1933] K. Ditch by Burwell Lode near Upware, TG Tutin, 5.8.1938, CGE. Ditch nr '5 miles from Anywhere– No Hurry', Upware, EF Warburg, 1938. ––––––––––––––––––– Swaffham Prior, n.c., 14.7.1828, CGE. Swaffham Fen, n.c., 18.8.1831, CGE. Swaffham, Hb JA Power, 29.6.1835, det WH Beeby, RTE. ––––––––––––––– Bottisham Fen, JS H(enslow), 25.7.1826, CGE. Bottisham Fen, CC Babington, 16.7.1850, CGE. Bottisham. Bab.1860,245. Bottisham, FR Tennant, 9.1888, CGE. ––––––––––––––– Hornsey Fen, W.L.P.G., 2.7.1827, SWN. 57 Wicken Fen. Bab.1860,245. Wicken Fen, Soham, JE Little, 26.8.1878, CGE. Wicken Fen, RI Lynch, 20.7.1881, CUBG 107/81. Wicken, HD.ann. Wicken Fen, deep pool, AJ Wilmott, 9.9.1910, see note attached Watson's.Bot.Exch.Club, Note: I saw this form in a pool on Wicken Fen, May 1887, ES M(arshall), CGE. Wicken Fen, in bog holes, where water is about 3 feet deep, Spring growth, 5.5.1887, ES Marshall, CGE. Ditches west side of Wicken Fen, A Wallis, 17.7.1900, CGE. Wicken Lode, (deep water form), CE Moss, 5.10.1910, CGE. CEM ann. Wicken Poor's Fen, CEM ann. Wicken St Edmunds Fen, CEM ann. Wicken Fen, R Morse in Hb JE Little, 15.8.1926, CGE. In lode N of track on N boundary of Wicken Fen, PH Oswald, 11.6.1952. Ditch by arable field at NE edge of St Edmunds Fen, Wicken, abundantly fl., SM Walters, 9.7.1957, CGE. Ditch on St Edmunds Fen, Wicken, as S.natans L. (S. minimum (Hartm.) Wallr.), CDK Cook, 26.7.1957, CGE In fl. more than last year (patch on rt of original, also fl. Wicken AGM, 20.7.1974, SM Walters, Wicken notebook. Large brickpit pond, first seen here c. 1970, now very flourishing, c. 3 sq. yds at edge of pond, 7.1976, SM Walters, Wicken card index. Wicken Fen, large brick pit, SM Walters, 1978. Reported from Cpt. 2 (Viola field) by Vicky Morgan, 1985, SM Walters, Wicken card index. 58 Ely!; W Marshall. Bab.1860,245. 66 Chippenham Fen, n.c., 1885, K. Chippenham Fen, n.c., 15.6.1886, [?A Hosking] CGE. Chippenham Fen, RI Lynch, 16.6.1886, CUBG 80/86. Chippenham Moor, AF.ann. Chippenham Fen, Capt. Steuart, Cowell Hb. 8.1888, IPS. Mr S. Wood and myself found this growing sparingly in Chippenham Fen in 1896. West,1898,257. Chippenham Fen, RH Lock, 16.7.1901, CGE. Chippenham, A Malins Smith, 31.7.1907. Chippenham Fen, veg. plants, M Musgrave, 1978; coll. and flowered in CUBG, 1979. Chippenham Fen, G Crompton & CD Preston, 66P, 1990, [R].
