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Page number:260 
Remarks (internal):Pseudocolus fusiformis is characterized by its onion shaped fruiting body when young and 3-4 (occasionally up to 6) arms when mature (Blanton & Burk 1980). From our measurements taken from 15 fresh specimens, the radius of the four unopened onion shaped fruiting bodies averaged 12-16 mm. All specimens bore only three arms. Mature fruit bodies measured 40-70 x 12-30 mm, and the lengths of the arms were 34-57 mm. These results are confirmed in Blanton & Burk (1980) and Quadraccia (1983).
In the literature, basidiospore sizes for P. fusiformis are reported as 1.7-2 x 4.5-5 µm by Burk (1976), 1.8-2 x 3.2-5.5 µm by Quadraccia (1983), and 1.5-2 x 3.75-4.5 µm by Blanton (1977). The spore sizes in our collection -2.8-3.2 x 4.9-5.6 µm - are greater than those given in the relevant literature.
This species appears not to require a specific habitat. Pseudocolus fusiformis occurs in habitats possessing mulch, wood mulch, or humus, and has been reported from Africa (La Réunion), Asia, Australia, Europe, North America, and South America (Blanton & Burk 1980).

 
Description type:Non-original description 
Description:Pseudocolus fusiformis (E. Fisch.) Lloyd, Syn. Phalloids: 53 (1909). Fig. 1
? Colus fusiformis E. Fisch., Neue Denkschr. Allg. Schweiz. Ges. Gesammten Naturwiss. 32(1): 64 (1890).
= Colus javanicus Penz., Ann. Jard. Bot. Buitenzorg 16: 160 (1899).
? Pseudocolus javanicus (Penz.) Lloyd, Mycol. Notes 2: 358 (1907).
? Anthurus javanicus (Penz.) G. Cunn., Proc. Linn. Soc. N.S.W. 56: 186 (1931).
= Pseudocolus rothae E. Fisch. ex Lloyd, Phalloids Australas.: 20 (1907).
“Colus rothae” E. Fisch., Neue Denkschr. Allg. Schweiz. Ges. Gesammten Naturwiss. 33(1): 23 (1893), nom. inval.
? Colus rothae (Lloyd) Sacc. & Traverso, Syll. Fung. 19: 389 (1910).
? Anthurus rothae (Lloyd) G. Cunn., Proc. R. Soc. N.S.W. 56: 188 (1931).
= Colus schellenbergiae Sumst., Mycologia 8: 183 (1916).
? Pseudocolus schellenbergiae (Sumst.) M.M. Johnson, Ohio Biol. Survey Bull. 22: 338 (1929).
= Pseudocolus jaczewskii Woronow, Izv. Kavkaz. Muz. 11: 196 (1918).
Immature fruit body 12-16 mm broad, globose to subglobose, resembling pear to egg shaped; peridium white to whitish gray or pale gray, thin, smooth, opening irregularly along three seams; rhizomorphs whitish, filiform, attached to the base. Mature fruit body 40-70 mm height, forming a stalk with tapering three united arms and a volva, arms 2-4 times length of stipe. Stalk white to whitish gray or pale gray, 15-30 mm height, 5-20 mm wide, not extending past volva, thin-walled, hollow, chambered, transversely rugose, flaring toward the upper end. Arms are three in all samples, bright orange to red orange, lanceolate, spongy, united at apex, cylindrical to flattened, transversely rugose and chambered. Gleba olive-green to dark green and slimy. Volva white to whitish gray or grayish, rugose and tough.
Basidiospores 2.8-3.2 x 4.9-5.6 µm, ellipsoid, smooth, hyaline. Basidia with 6-8 spores.
Ecology solitary or scattered, on disturbed soil in deciduous, coniferous, or mixed forests, gardens; also on old woodchip mulch, thick grass, leaf mulch and humus.

 
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