Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 66. (Budapest 1974)

Babos, M.: Studies on Hungarian Lepiota s. l. species, IV.

ANNALES HISTORICO-NATURALES MÜSEI NATION ALIS HUNGARICI Tomus 66. Budapest 1974. Studies on Hungarian Lepiota s. 1. Species, IT. By M. BABOS, Budapest Abstract — Author describes some rare Lepiota species (L. rufipes, L. subincarnata, L. brunneo-incarnata, L. fulvella, L. oreadiformis, L. alba) from the Great Hungarian Plain where the locust-tree forests on sandy soil are favourable habitats for these species. Two Macrolepiota taxons (M. excoriata forma barlae f. n. and M. rhacodes var. hortensis) grown on compost are also reported on. — 0 figures. Lepiota rufipes MORGAN (Fig. 1) More than one European author (KÜHNER 1936, PILÂT 1951, KÜHNER & ROMAGNESi 1953, MOSER 1967, BRESINSKY & STANGL 1971) has given a shorter or longer description of this rare species, and from among the American authors KAUFFMAN (1924) and SMITH (1954) have dealt with it. The occurrence of this species in France and Algeria was reported by KÜHNER & MAIRE (1937) as well as by JOSSERAND (1955) on the basis of their own collections and with detailed description. Herbaria] data*: Törökfái, Com. Bács-Kiskun, in a locust-tree wood on sand, 4 Sept, 1969, leg. BABOS — VÉSSEY. — Szentendre Island, near Kisoroszi, in locust-tree woods on sand, 22 Sept. 1970, leg. BABOS — BOHUS — KISSZÉKELYI — SUNHEDE. Small-sj)ored Lepiota species (L. parvannulata, L. seminuda, etc.) of similar appearance but belonging to different sections are easy to differentiate from each other on the basis of the structure of the cuticle. Two of MORGAN'S species with hymenium-like cuticles first of all differentiated on the basis of the presence or absence of the ring. According to the literature cited in the introduction the stem of L. rufipes has no ring and only on the basis of the observations of KÜHNER & MAIRE (1937) is mention made about a whitish, weak, disappearing cortina. This has caused some problem in the identification of the samples collected in Hungary, because — as it is also apparent from the description — there was a ring visible in a considerable proportion of the collected specimens, moreover still seen on the herbarium specimens. L. neophana MORGAN has hymenium-like cuticle and ring, and the disrupting cuticle on the pileus of our fungus as well as the white rhizoids more or less visible at the base of the stem may also conform to this species. SMITH (1954) has studied both species and the measurements published by him show that L. rufipes is a fungus of smaller pileus (diameter of pileus: L. rufipes 0,8—1,0 cm; L. neophana 1,0—3,0 cm), and of somewhat stubbier spore (L. rufipes 4x 2,5—3 p; L. neophana 3,5—5,5x 2,2—2,8 p). A survey of the European litera*The material is deposited in the herbarium of the Botanical Department of the Hungarian Natural History Museum, Budapest. Ann. Hist.-nat. Mus. Nat. Hung., 197i, 66.