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Les grandes lignes de la classification des Agaricales, Plutéales, Tricholomatales (suite)

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PARTIE SCIENTIFIQUE

LES GRANDES LIGNES DE LA CLASSIFICATION DES AGARICALES, PLUTEALES, TRICHOLOMATALES.

(suite) par R. Kûhner.

Dans un mémoire publié récemment ici même ], nous avons pris le vocable Agaricales dans un sens plus étroit que Singer, éliminant de cet ordre les cham¬ pignons pour lesquels avaient été créés les ordres Boletales et Asterosporales.

Aujourd'hui nous sommes amené à réduire encore davantage l'ordre des Agaricales , en créant à ses dépens deux autres ordres : Pluteales et Tricholo-matales.

Généralités

I. Les grandes coupures friesiennes réparties par nous dans ces trois ordres

A. Les genres friesiens et les séries distinguées par Fries dans son énorme genre Agaricus

Presque toutes les espèces que nous rangeons dans nos trois ordres, Agari¬ cales, Pluteales et Tricholomatales, étaient initialement (Systema ) classées par Fries dans un seul genre Agaricus, qui comprenait en outre nos Asterosporales (Russula et Galorrheus, cette dernière coupure correspondant aux futurs Lacta-rius) et les Boletales lamellées.

Dans le Systema, Fries répartissait les espèces de son genre Agaricus en 5 séries définies et subdivisées comme suit :

Série 1. Leucosporus. Spores blanches.

X Stipe central, voilé.

X X Stipe central, nu. xxx Stipe excentrique ou nul.

Série 2. Hyporhodius. Spores roses. Voile nul.

Série 3. Cortinaria. Spores ocracées. Voile aranéeux.

Série 4. Derminus. Spores ferrugineuses. Voile non aranéeux.

X Voile distinct.

X X Voile fugace ou obsolète.

Série 5. Pratella. Spores brun pourpre. Voile non aranéeux.

Dans cete série Fries plaçait une coupure Coprinarius, à spores noires.

Cette série est suivie de la coupure Coprinus, également à spores noires, que Fries tendait à séparer de l'ensemble des autres Agaricus.

Comme le montre le tableau qui précède le caractère considéré par Fries comme hiérarchiquement le plus important est la couleur de la sporée, le seul caractère que cet auteur ait souligné en italiques dans les définitions de ses séries.

1. Les grandes lignes de la classification des Agaricales, Asterosporales et Boletales. Survol historique et critique. Bull. mens. Soc. linn. Lyon. 46 (1977), p. 81.

BULLETIN DE LA SOCIETE LINNEENNE DE LYON, 47e année, n" 3, mars 1978.

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