Go to Landcare Research home page
 
Home About Mushrooms Simple key Genus (A-Z) Help

« Back

Go to the NZFungi website for more indepth information on Hysterangium youngii. Hysterangium youngii

Biostatus

Present in region - Indigenous. Endemic

Images (click to enlarge)

 

Caption: Fig. 8 Hysterangium youngii. A, Basidiomata exterior and in section (PDD 60093, Trappe 9878 (OSC)). B, Basidiospores in optical section by bright field (PDD 60093). C, Basidiospores in surface view by bright field (PDD 60093). D, Basidiospore b

Caption: Dried type specimen
Owner: Herb PDD
 

Article: Castellano, M.A.; Beever, R.E. (1994). Truffle-like Basidiomycotina of New Zealand: Gallacea, Hysterangium, Phallobata, and Protubera. New Zealand Journal of Botany 32(3): 305-328 (http://www.rsnz.org/publish/abstracts.php).
Description: Basidiomata up to 1 cm diam., subglobose to irregularly lobed, white, bruising brown when fresh, dark brown with pale brownish white areas when dried, surface wrinkled when fresh. Gleba firm, cartilaginous, dark green; locales irregular, partially filled, some contiguous with peridium. Rhizomorphs few, small (<1 mm diam.), attached to base, concolorous with peridium. Columella much reduced, dendroid, translucent. Taste not noted. Odour nil. Peridium not separable from gleba, a single layer 400-450 µm thick, of thin-walled, irregularly inflated hyphae, 20-35(-40) µm diam., smaller and more or less periclinal near gleba and peridial surface, outer portion (100-150 µm) golden brown and encrusted with soil particles, inner portion (250350 µm) hyaline without incrustations, clamp connections absent. Trama up to 80 µm thick, of hyaline, thin-walled, interwoven hyphae, 3-4 µm diam., in a gelatinised matrix, clamp connections absent. Basidia not observed. Spores minutely to moderately verrucose, 18-20(-22) x 6-7 µm, ellipsoid to fusoid, some asymmetric; apex acuminate to mostly papillate, base with a sterigmal attachment 1 µm long x 2 µm wide; wall 1-1.5 µm thick, thicker at spore apex. Utricle wrinkled, adherent, up to 1 µm thick. Spore colour in KOH pale green singly, olive brown in mass.
Habitat: Habitat: hypogeous in podocarp-broadleaf forest, probable mycorrhizal associates uncertain. Season: April.
Distribution: New Zealand.
Notes: ETYMOLOGY: Named for the collector of the type, Roy Young of Grants Pass, Oregon.
REMARKS: Known only from the type collection.
Hysterangium youngii has the largest spores of any Hysterangium species in New Zealand. It resembles H. salmonaceum Beaton, Pegler & Young from Australia in spore size and shape, but can be distinguished by its ornamented spores.