Geastrum "triplex-IN01"

Geastrum "triplex-IN01" is a species of fungi found on both the west coast and east coast of North America. So far, only sequenced from the united States of America. Collections are concentrated on the East Coast USA at this time. As of April 24 2025, there are 15 observations of Geastrum "triplex-IN01" on iNaturalist with ITS data available [1]. Found May through November with most occurrences recorded in September followed by October. The collection with the highest RiC as of January 30 2025 is 390 [2]

Description

Potentially growing gregariously most commonly reported under Maple [3] [4] [5] but also under White Pine [6] , Pine (East Coast) [7] , Hemlock (East Coast) [8] , Beech [9] , and Rhododendron (West Coast) [10] . When young and unopened 2-3cm wide [11] [12] at least with a pale to brownish colored exterior [13] [14] [15] [16] and sometimes with an umbonate apex [17] . Sometimes appearing scaly to rough in appearance [18] . At maturity 5-6cm wide [19] [20] at least with 5 rays most commonly [21] [22] [23] but sometimes with large rays splitting further into as many as 8 rays [24] [25] . A collar forming at times as expected with Geastrum triplex. Chestnut brown underside when fresh and wet not holding onto an abundance of material seemingly. Exposed spore case on mature specimens usually with a beak and surrounding disk [26] [27] [28] [29] [30] and other times difficult to discern and beak not noticeably lined. Spore case not on a pedestal. Spores [31] Dark brown, globose, spines, and one measurement recorded an average of 4 microns [32] . Odor when sliced immature strong "fungal/glue" in one specimen [33]

Similar Species

Also called the following on iNaturalist:

Geastrum triplex

Geastrum fimbriatum

Geastrum fuscogleba

Ecology

Potentially growing gregariously most commonly reported under Maple [34] [35] [36] but also under White Pine [37] , Pine (East Coast) [38] , Hemlock (East Coast) [39] , Beech [40] , and Rhododendron (West Coast) [41]