THE DISTRIBUTION OF PADINA PAVONICA 47 



flank of Pointe du Conguel), on sheltered Bale de Quiberon coast of peninsula, tends to disappear 

 end viii/beginning ix; (vii) sandy shores on sheltered Baie de Quiberon coast, on sand over rock and 

 in Cystoseira pools amongst Ascophyllum; (viii) plage de Saint- Julien, 8.viii.l949. 



St Gildas de Rhuys (Presqu'ile de Rhuis) : 

 Lyle, 22.vii.l926(BM). 



Belle-lie: 



Wuitner (1931), in pools with runnels of freshwater, on schistose rocks, cove near Port 

 Fouguet, ix.1923; hollows of Gros Rocher, ix.1928; Hamel (1939) (Gilgencrantz). 



Morbihan : 



Hamel (1939), Lloyd, Alg. Quest, no. 155. 



Although this southern root is much like the rest of Brittany, some of its east-facing shores 

 are much more sheltered from the effects of long Atlantic fetch. Padina is well known from here, 

 but for rather few places (principally Belle-Ile-en-Mer and Quiberon); these largely represent areas 

 examined, rather than realities of Padina distribution. Habitats in which Padina has been detected 

 here differ little from those further north. It can reasonably be suggested that, anywhere in 

 Morbihan, habitats of the type described by Davy de Virville (1952a, 1962) are likely at least 

 periodically to support populations. Seasonality is not clear from published information; collect- 

 ing periodicity of phycologists appears to be the major constraint on available data. The earliest 

 traced collection date is late July (Lyle), although the Belle-lie and Quiberon data were gathered 

 in August and September. The phenology probably differs little from that elsewhere in this northern 

 part of the range, with an annual appearance in spring or early summer and degeneration of up- 

 right fronds during September or October, save in exceptional years. 



Loire Atlantique; Vendee; Charente Maritime 



Mainland coasts : 



Le Croisic: Debray (18830), Port and Jetty of Croisic, Grande Cote, 15. vii to 15.viii; Flahault 

 (1889), pools in bay about lower neaps level; Cazal (1928), ix.1920, lower shore, on rocks; Hamel 

 (1939) (Gomont); Lecocq (1975), trips with students, including May 1975. 



Sion and Corniche Vendeenne; Lancelot (1961), on rocky facies at the foot of the Corniche 

 Vendeenne, from before Sion and Croix-de-Vie to Pointe de Grosse-Terre, midlittoral, in hollows 

 and channels, somewhat rare. 



La Pironiere: Lancelot (1961), rather common. 



La Rochelle: Hamel (1939) (D'Orbigny). 



Charente Maritime general: D'Orbigny (1820), common, coasts of Gulf of Gascony, 

 particularly of Charente Maritime, level 2 (1-5 m below MHW to 4-5 m below MLW). 



Note: if Hamel (1939) was reporting the La Rochelle record on the basis of specimen or MS 

 data of D'Orbigny, this 1820 entry may also reasonably be reported as from La Rochelle. 



Island coasts : 



lie de Noirmoutier: Hamel (1939) (Brongniart). 



Western coasts: Lancelot (1961), common on the gently sloping Rochers de la Loire, in front of 

 Pointe de la Loire, midlittoral, in pools. 



North-western tip: Lancelot (1961), Pointe de 1'Herbaudiere, rather common. 

 Northern coasts: Lancelot (1961), gently sloping rocky coast before Pointe de la Gardette, 

 consists of small 'tables', at LW, whose irregular surfaces are separated by shallow channels and 

 sandy-bottomed hollows below Fucus serratus, also occurs in Rhodymenia [Palmaria] band in 

 June-July. 



lie d' Yen: Beauchamp (1923), in pools with gravel bottoms, mixed with [Zostera] meadows, 

 in rocky facies. 



