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Russula Caerulea Sp-P1-MJ-VU-24-8-14.Pub

RUSSULA CAERULEA Nom de référence : Russula caerulea Fr. Synonymes : Russula amara Kucera Agaricus caeruleus Pers. Classiﬁcaon : Division : Basidiomycota Ordre : Russulales Famille : Russulaceae Nom français : russule amère, russule bleue. Intérêt culinaire : non comesble. P oto Wikipedia 1-DESCRIPTION 1-1 Silhoue)e : au sol, de dimension moyenne avec un pied central surmonté d un chapeau conique puis apla et mamelonné. Couleur dominante : violet. 1-2 C apeau : de 4 % 10 cm. Il est d abord plus ou moins conique, puis vaguement apla avec un très net mamelon centré au fond d une dépression circulaire. Le rev,tement est de couleur violet sombre, vineu-, presque noir avec des décoloraons brunes ou cuivrées. Il est lisse, gras par temps humide, brillant, .nement chagriné /loupe0 1 il n est séparable que sur 123 du rayon par temps sec mais sur 122 rayon par temps humide. La marge incurvée, brillante, unie ou striée5cannelée dans la vieillesse, est concolore au rev,tement. 1-3 Pied ou spe , de 358 8 152 cm, plut9t long et svelte, il est central, cylindrique mais rétréci en haut et parfois aussi en bas 1 il est asse: dur, plein puis farci et spongieu-. Sa surface est blanche, salie de gris<tre ou de brun<tre. Elle est pruineuse en haut che: le jeune champignon, et marquée de .nes rides longitudinales /loupe0 1 elle est asse: brillante. 1-4 C air , dans le chapeau elle est ferme et compacte mais non dure. Elle est blanche mais jaunit puis grisonne plus tard, elle est violac ée sous le rev,tement du chapeau. Sa saveur est douce alors que le rev,tement du chapeau est amarescent, l odeur est fruitée et acidulée. 1-. Lames , adnées ascendantes % l inseron sur le pied, plut9t serrées puis un peu espacées, elles sont minces, un peu fourchues. Elles sont d abord blanc ivoire puis crème, ensuite jaune citrin et en.n jaune ochracé. Présence de quelques rares lamelles et les lamellules. L ar,te est enère et concolore % la face des lames. 1-6 Sporée : jaune p<le. 1-0 1abitat : ce?e espèce vient dans les pinèdes en sol acide et sablonneu-, elle est souvent solitaire. On la trouve de juillet % .n novembre. 1-8 Réparon : ce?e espèce est asse: commune en plaine et en montagne. 2-O4SER5ATIONS A?enon, dans de nombreu- ouvrages mycologiques la Russula caerulea porte le nom de Russula amara. La chair des russules étant granuleuse, leur pied casse comme un b<ton de craie 1 il est donc impossible de rer des lanières de la chair ou du corte- du pied. 3-INTER6T Ce?e espèce ne présente aucun intér,t. 4-RIS7UES DE CON8USION Les risques de confusion sont asse: rares car ses couleurs et son très net mamelon sont très caractérisques. Vériﬁé .

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