Tulostoma excentricum Long
Source: Index Fungorum
Family: Agaricaceae
Tulostoma excentricum image
W.H. Long  
Wright J.E. 1987. Bibliotheca Mycologia 113: 101.

Tulostoma excentricum Long (Fig. 48, 47bis; Pls. V: 3-4; XXXVI: 2) Mycologia 36: 332-333, fig. 5. 1944.

= T. desertorum Philimon. & Schwarzm. apud Schwarzmann & Philimonova, F1. Spor. Rast. Kazhastan, VI: Gasteromycetes, p. 212-213, fig. 75, tab. XIII, fig. 7. 1970.

Etym.: the name probable refers to the eccentric position of the mouth.

Spore-sac up to 18 x 13 mm, globose-depressed. Exoperidium hyphal, the threads mingled with sand grains. Endoperidium whitish to ochraceous to light greyish with purplish hues, smooth. Mouthtubular, , prominent, projecting, in some specimens with a sunken peristome. Socket conspicuous, not very separated from the stem. Gleba light ferrugineous. Stem variable, generally concolorous, slightly tapering towards the base (notoriously so in some specimens), up to 70 x 6 mm, in some specimens very thin and dark, squamose, scales like in Battarraea but inverted, with a small volvoid formation at the base.

Spores subglobose to ellipsoid, almost imperceptibly punctate under L.M., but visible with a good oil-immersion lens; some apiculate, 4.6-6.1 µm diam, light brown. Under SEM the ornamentation appears as smalt, uneven verrucae, dispersed or anastomosed in crests, which sometimes form short and uneven rosaries. Capillitium subhyaline, branched, septate; threads very thick-walled and lacunar lumen, swollen at the coloured septa; 2.6-5.4 µm diam.

Habitat: sandy soil.

Distribution: North America: SW United States. Asia: U.S.S.R.: Turkmenskaia SSR, Kazhastan SSR.

Holotype: United States, New Mexico, E of Sandia, Vista Court, Albuquerque, leg. W.H.Long, 20.V1.1941 (Herb. Long n° 9360, BPI!).

Illustration: Long (op. cit.).
Tulostoma excentricum image
Robert Chapman  
Tulostoma excentricum image
Robert Chapman  
Tulostoma excentricum image
Jorge Wright  
Tulostoma excentricum image
Scott T. Bates  
Tulostoma excentricum image
Tulostoma excentricum image
The New York Botanical Garden  
Tulostoma excentricum image
Tulostoma excentricum image
The New York Botanical Garden  
Tulostoma excentricum image
Tulostoma excentricum image
The New York Botanical Garden  
Tulostoma excentricum image
The New York Botanical Garden