Stem cortex in 2-3 layers, hyaline cells without fibrils or sparsely fibrillose, with one pore; central cylinder reddish brown.
Stem cortex in 2-4 layers, hyaline cells thin-walled, sparsely fibrillose and porose; central cylinder reddish brown.
5-5 cm broad; surface dry, with brown fibrillose scales on the disc (center of cap); color ranging from yellow-brown to brown.
5 mm wide at apex, equal with a slightly enlarged base which is dark brown; stipe above base yellow at first, becoming brown with age or handling; fibrillose, hollow, smooth except at apex which is pruinose to mealy.
Fibrillose, delimited peristome; exoperidium and endoperidium brownish to beige; basidiospores greater than 3,2 [micro]m diam 12 12 (11).
Geastrum javanicum is characterized primarily by the velutinous, ephemeral mycelial layer, forming a cup under the saccate basidioma, fibrillose delimited peristome and subiculum.
Endoperodial body sessile 2 cm across globose to subglobose or slightly depressed onion shaped when not depressed smooth seated in saccate slightly depressed basel area of exoperidium grayish brown with occasional darker tints; Peristome fibrillose
and conical dark brown surrounded by circular shallow groove.