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The Essex Records 1820 -2007.

Following the introductory paragraph to each taxon, the records are set out in columns. The first being the letter and alternative number (in brackets) code for the 100 x 100km square, followed by the 10 x 10km square number, arranged in conventional order from south to north, moving from west to east; the second column gives the 1 x 1km square or the 100 x 100m square Ordnance Survey grid reference if known; the third the vice county, and the final column the available details of the individual record. Approximate grid references for older records are suffixed by a?

Tolypella nidifica var. glomerata (Desv.) R.D. Wood

This is the commonest Tolypella taxon in Britain. Like T. intricata it can germinate in the autumn and overwinter, although fruiting somewhat later in June/July. It can also, however, be a summer annual, germinating in May and fruiting by July (Moore, 1986). We do not have enough data to tell whether it persists in the same place from year to year in Essex, but this should be available over the next few years by following up our recent records. It is most reliably distinguished from the very rare var. nidifica, by its antheridia and oogonia, which are both less than 0.5mm as opposed to more than 0.5mm diameter, and from N. intricata by the string of sausage-like-cells forming the branchlet termini..

TQ(51) 57

596,794

18

Warren Farm Chalk Pit, shallow pool at northern end, sparce, on grapnel, immature antheridia and oogonia. 2 November 1987. Coll: & det: Tim Pyner.

Pickled specimen deposited in Southend Central Museum Herbarium (STD).
         

TQ(51) 58

565,828

18

Upminster, scattered around the shallows of Hunt's Hill Lake (lake excavated c. 2yrs ago), with antheridia plus oogonia, 6 May 2002. Coll: Mary Smith., (det:KJA).

  
         

TL(52) 54

56 ,43?

19

Saffron Walden, near Monks Hall, in a ditch, c.1850. Collector? Gibson.

Specimen in Saffron Walden Museum Herbarium(SWN).                  Confirmed J.A.Moore.
         

TL(52)61

 688,188 19 Broomfield C.P., Tufnell Mere old gravel working. Fertile. Growing with the colonial ciliate Ophrydium versatile. 26 May 2016. Barbara Chapman. Det: K. J. Adams.  
         

TL(52) 71

???????

19

Boreham, pond. 6 July 1880. Legit: H.N.Dixon. Herbarium of James Groves.

Natural History Museum Herbarium (BM). Atlas Specimen No. 2257
 

707,185

19

Lodge Lake agricultural reservoir, east of Leez Priory, dense marginal raft along eastern section of north shore, heavily encrusted, delapidated, and beginning to break up and release numerous clusters of dark coloured oospores. Growing with C. vulgaris var.longibracteata and Potamogeton pectinatus. 19 July 1986. Coll: & det: K J Adams.

  
TL(52)91 96 ,16 19 Abberton Reservoir, 2008. Joanne Denyer. Confirmed: Nick Stewart

TQ(51) 99

???????

19

Paglesham, dyke by sea-wall, 1964. Coll: & det: Eric Saunders.

Flora of Essex. p.45. 1974.