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Report of overseas field meeting - Western Portugal43parked in the botanical reserve in the centre ofthe spit than we were examining considerablenumbers of an as yet unidentified (by us) bushcricket on the Santolina impressa (a Portugueseendemic). Another botanical treasure observedby the roadside was the small but delightfulJonopsidium acaule - dense pincushions of apale pink crucifer with spoon-shaped yellow·green leaves - which is unique to the coast ofsouthern Portugal as a wild plant, althoughwidely cultivated in Europe (Colour SectionPlate 3).Our overall impression of the flora of thedunes was of abundant pink, yellow and blue,set against a background of grey green shrubsand an occasional stunted Pinus pinea. Thepink was predominantly Silene littorea and tallspikes of Antirrhinum majus subsp linkianum,and the yellow pertained to Senecio gallicus andtwo shrubby species of Halimium - H calycinumand H halimifolium - while the scene wasfurther enlivened by the deep blues of the attractiveAnagallis monelli (Shrnbby Pimpernel),Anchusa undulata (Undulate Anchusa) andLithodora diffusa subsp. lusitanica (ScramblingGromwell). Several Thekla larks were singingover the low scrub, butterflies seen includedSwallowtail, Cleopatra and Small Copper, andwe also encountered many individuals of thebeautifully marked, day-flying noctuid mothknown as Cerocala scapulosa.The many species of shrubs included Juniperusoxycedrus (Phoenician Juniper), Cistussalviifolius (Sage-leaved Cistus), Ulex australissubsp. welwitschianus, Lavandula stoechassubsp. luisieri and Armeria pungens (SpinyThrift), as well as the unusual Corema album(Empetraceae), which is confined to the coastsof western Iberia and North Africa. Growing inthe protection of these shrubs were some earlyflowers of Fritillaria lusitanica, and we alsofound Cytinus hypocistis here: a member of theRafflesiaceae, parasitic on the roots of Cistusspecies.Nearer the sea, the results of convergentevolution made us look closely at the prostrate,grey-leaved and yellow flowered legumes sothat we could distinguish between Medicagomarina (Sea Medick) and Lotus creticus(Southern Birdsfoot-trefoil). Also adapted tothis unstable habitat were Honckenya peploides(Sea Sandwort), Polygonum maritimum (SeaKnotgrass - extremely rare in the UK) (ColourSection Plate 3), Eryngium maritimum (Seaholly),the fleshy leaved Thymus carnosus (anIberian endemic thyme), Crucianella maritima(Coastal Crucianella), the British rarityOtanthus maritimus (Cottonweed), Pancratiummaritimum (Sea Daffodil), the distinctiveCyperus capitatus and carpets of Corynephoruscanescens (Grey Hair-grass). Our lunch stopoverlooking the estuary to the east enabled us toobserve the extra large flowers of Dianthusbroteri (Colour Section Plate 3) and to findSesamoides spathulifolia: a handsome, brownflowered relative of Reseda.The Tr6ia sand spit has long been settled byman but the extensive Roman ruins of Cet6brigawere 'closed for restoration', as they have beenfor the last four years! Nearby, and close to thetidal inlet of Caldeira de Tr6ia, the fossil duneswere clothed with Pinus pinea, with an understoreyof shrubs that included Stauracanthusgenistoides, Retama monosperma (WhiteBroom) and Osyris lanceolata. Down amongthe low brackish vegetation, some of us weredelighted to find the emerging spikes ofCistanche phelypaea subsp phelypaea(Cistanche), while others were rewarded with asuperb Striped Hawk-moth: both fitting endingsto a very enjoyable day.22 March - Moinho de Baixo and Quinta daSerraWhile Malcolm went to Lisbon in search of areplacement camera body, the rest of usexplored the Atlantic dune system north ofMoinho de Baixo. The vegetation was superficiallysimilar to that of previously visitedcoastal sands, with abundant Malcolmia littorea,Silene littorea, Lotus creticus andMedicago marina, but the greater westerlyexposure also suited familiar species such asCalystegia soldanella (Sea Bindweed) andAmmophila arenaria (Marram). Also prominentwere Armeria pungens, Anchusa undulata(its sinuate leaves clearly distinguishing it fromA. calcarea), Thymus carnosus, Helichrysumitalicum subsp. serotinum, and Artemisiacampestris subsp. maritima (Sea Wormwood).We also found good quantities of Polycarponalsinifolium, while the striking yellow Linariawith glaucous leaves and brownish-purplestripes on the spur was subsequently identifiedas L. lamarcldi.Reedbeds in a low-lying area signalled anabrupt change in the flora, with Hypericumundulatum (Wavy St John's-wort), Hydrocotylevulgaris (Marsh Pennywort), Carex riparia(Greater Pond-sedge) and Cladium mariscus(Great Fen-sedge) complementing the Phragmitesaustralis, with young fiddleheads ofThelypteris palustris (Marsh Fern) confirmingthe presence of a permanent sub-surface drainagesystem. A further visit next morning

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