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in the same species, and sometimes in different portions of
the same individual we meet with the features of the two
supposed genera. Finally in Arcyria, in Rostafinski’s sense,
the markings, whether in the form of prominent, ridge-like
half-rings or spines, are arranged in a spiral manner, and may '
be looked upon as the remaining portions of continuous spiral
ridges, the greater portions of which are obsolete. For the
above reasons the two genera proposed by Rostafinski have
been merged into one under the older name of Arcyria.
Distrib. Europe; S. Africa; India; E. Indies; Ceylon;
Australia; N. Zealand; Tasmania; United States; S. America.
Species 38.
A. Eu-Areyria. Threads of capillitium without continuous
spirally arranged ridges.
* Spores smooth.
Arcyria punicea, Rost. (figs. 242—244).
Sporangia globose, ovate or elliptical, stipitate, wall vermilion,
sometimes with a brownish or purple tinge, rarely yellowish-
brown ; stem slender, about equal in length to sporangium or
longer, same colour, filled with large cells, expanding at the
base into a hypothallus, capillitium and mass of spores dull-
vermilion, crimson-lake, brownish, or sometimes yellow-brown;
capillitium dense, protruding elastically, attached at many points
to the firm, plicate, persistent basal portion of the sporangial wall,
threads comhined to form a very irregular network with or
without free ends, furnished vrith prominent half-rings arranged
in a very open spiral, remainder smooth; spores globose, smooth,
pink, or pale-brown, 6— 8 g. diameter.
Arcyria punicea, Rost., Mon., p. 268, figs. 190, 192, 197;
Cke., Myx. Brit., p. 69, figs. 190, 192, 197; Sacc., Syll., vii., 1,
n. 1437; Zopf, p. 163.
Arcyria vernicosa, Rost., Mon. Supp., p. 69.
Exsicc.—Jack, Leiner u. Sitz., n. 613; Cke., Fung. Brit., 613;
ed. II., 320; Syd., Myo. March., 915; Rah., Fung. Eur., 1914;
Fckl, F. Rhen., 1441; Karsten, Fung. Fenn., 378; Ellis, N.
Amer. Fung., 1114; Klotzsch, Herb. Myo., 671; Rav., Fung.
Car., 80; Wentendorp, Herb. Crypt. Belg., 81; Desm., Cr. Fr.,
Ser. I., 1510.
On rotten wood. Britain (Poole, Woolwich, Kew, Chester,
Scarboro’, Carlisle, Aboyne, N. B.); Europe; S. Africa; Ceylon;
S. Australia; New Zealand; United States; Canada; Brazil.
Gregarious, often springing from a common hypothallus,
1-5 3 mm. high. Distinguished by the capillitium being
attached to the cup-like permanent portion of the sporangial
wall, and the prominent, flattened half-rings arranged in a loose
spiral on the threads of the capillitium, which are otherwise
smooth. The threads of the capillitium are often compressed
or triangular, but not unfrequently terete.
(Rostafinski’s Synonyms.)
Clathroides purpurcum, Mich., t. 94, f. 1, 1. c. (1729); Hall,
pL 1, f. 6 (1742).
Clathrus pcd.iculatus, Guett., Obs. 1, 16 (1747).
Arcyria pedicula, Hill, p. 47 (1731).
Clathrus denudatus, Linn., Sp. PI, 1179 (1753).
Trichia, Hall, No. 2164, t. 48, f. 6 (1768).
Mucor clathroides. Scop. Carr., ii., 492 (1772).
Alueor pyriformis. Leers. FI. Herb., 1135 (1775).
Clathrus pedunculatus, Batsch. FL, p. 141 (1783).
Lycoperdon rufum, Dicks Cry., fasc. i., p. 25 (1785).
Stemonitis denudata, Rehl FL Cant. (1786).
Embolus crocatus, Batsch., t. 30. f. 176 (1786).
Stemonitis crocata, Willd. FI. Ber., 1189 (1787).
Stemonitis coccinea. Both. FL Germ., i.. 548 (1788).
Trichia denudata, VilL F I Dauph., 1060 (1789) ; Purt. Mid.
FL, t. 24, f. 2; Sow., t. 49.
Trichia graniforniis, Hoffm. V. Cr., i., p. 3 (1490).
Trichia cinnabaris. Bull, t. 502, fig. 1, b. c. (1791).
Stemonitis crocea, Gmel. Sys., 1467 (1791),
Trichia rufa. With. Arr., iii., p. 478 (1795).
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