Feedback request: Convolvulus arvensis (33140)

[oldnick]

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Specimen #356663

Taxon:	Convolvulaceae: Convolvulus arvensis L. ("Field Bindweed")
Filed in taxon folder:	Convolvulaceae: Convolvulus arvensis L. ("Field Bindweed")
Collected by:	Peter Charles Holland Miss Margaret Elizabeth Kennedy
Collection date:	18/8/1984
Locality:	Great Britain, VC20 Hertfordshire, Essendon, TL2608, Roadside bank Tetrad TL20/T68 [if = TL2608, the site is West End, Essendon, between Hatfield & Hertford]
ex herb:	Peter Charles Holland
Institution:	South London Botanical Institute (SLBI)
Image:
fruits/flowers:	mature flowers
notes:	Colour variants. The lower specimen was white with purple centre, which has, however, faded on drying.

Documented by xmhcman on 2^nd February 2013.

Edit history

date	user	change
24/06/2013	chrisu	Deleted locality: GB VC20, Roadside bank Tetrad TL20/TL68
24/06/2013	chrisu	Added locality: GB VC20, Roadside bank Tetrad TL20/T68 TL20 (place)
29/10/2014	oldnick	Deleted locality: GB VC20, Roadside bank Tetrad TL20/T68 TL20 (place)
29/10/2014	oldnick	Added locality: GB VC20 Essendon, Roadside bank Tetrad TL20/T68 [if = TL2608, the site is West End, Essendon, between Hatfield & Hertford] TL2608 (place)

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User comments about this sheet

oldnick wrote

If the GR is read as TL2608, the site is West End, Essendon, between Hatfield & Hertford

[Roger Horton]

I think you're right. Holland appears to be numbering tetrads 0, 2, 4, 6, 8, by eastings then northings, so T68 is equivalent to DINTY 'U', and TL20/T68 = TL20U.



This works with sheet 366504 which has both 6-digit OS reference and Holland's tetrad system.

[Roger Horton]

In 1973 (London Naturalist 52, 29-30) Margaret Elizabeth Kennedy and Peter Charles Holland (both long-standing and active members of the LNHS) reported first results from the 'Plant Mapping Scheme' based on tetrads using the '0, 2, 4, 6, 8' system published by LNHS in 1965. There is a more recent MAP showing the coverage of the system, a circular area radius 32km centred on St Paul's, which extends into VC20, Hertfordshire, as well as into other Home Counties.