 Astraeus pteridis is larger , 5 to 15 cm ( 2 @.@ 0 to 5 @.@ 9 in ) or more when expanded , and often has a more pronounced areolate pattern on the inner surface of the rays . It is found in North America and the Canary Islands . A. asiaticus and A. odoratus are two similar species known from throughout Asia and Southeast Asia , respectively . A. odoratus is distinguished from A. hygrometricus by a smooth outer mycelial layer with few adhering soil particles , 3 – 9 broad rays , and a fresh odor similar to moist soil . The spore ornamentation of A. odoratus is also distinct from A. hygrometricus , with longer and narrower spines that often joined together . A. asiaticus has an outer peridial surface covered with small granules , and a gleba that is purplish @-@ chestnut in color , compared to the smooth peridial surface and brownish gleba of A. hygrometricus . The upper limit of the spore size of A. asiaticus is larger than that of its more common relative , ranging from 8 @.@ 75 – 15 @.@ 2 μm . A. koreanus ( sometimes named as the variety A. hygrometricus var. koreanus ; see Taxonomy ) differs from the more common form in its smaller size , paler fruit body , and greater number of rays ; microscopically , it has smaller spores ( between 6 @.@ 8 and 9 μm in diameter ) , and the spines on the spores differ in length and morphology . It is known from Korea and Japan . 
 Astraeus pteridis is larger , 5 to 15 cm ( 2 @.@ 0 to 5 @.@ 9 in ) or more when expanded , and often <a href='got' title='1'><mark>has</mark></a> a more pronounced areolate pattern on the inner surface of the rays . It is found in North America and the Canary Islands . A. asiaticus and A. odoratus <a href='drop_aux' title='2'><mark>are</mark></a>two similar species known from throughout Asia and Southeast Asia , respectively . A. odoratus is distinguished from A. hygrometricus by a smooth outer mycelial layer with few adhering soil particles , 3 – 9 broad rays , and a fresh odor similar to moist soil . The spore ornamentation of A. odoratus <a href='drop_aux' title='3'><mark>is</mark></a>also distinct from A. hygrometricus , with longer and narrower spines <a href='null_relcl' title='4'><mark>that</mark></a>often joined together . A. asiaticus <a href='got' title='5'><mark>has</mark></a> an outer peridial surface covered with small granules , and a gleba <a href='null_relcl' title='6'><mark>that</mark></a><a href='drop_aux' title='7'><mark>is</mark></a>purplish @-@ chestnut in color , compared to the smooth peridial surface and brownish gleba of A. hygrometricus . The upper limit of the spore size of A. asiaticus <a href='drop_aux' title='8'><mark>is</mark></a>larger than that of its more common relative , ranging from 8 @.@ 75 – 15 @.@ 2 μm . A. koreanus ( sometimes named as the variety A. hygrometricus var. koreanus ; see Taxonomy ) <a href='uninflect' title='9'><mark>differs</mark></a> from the more common form in its smaller size , paler fruit body , and greater number of rays ; microscopically , it <a href='got' title='10'><mark>has</mark></a> smaller spores ( between 6 @.@ 8 and 9 μm in diameter ) , and the spines on the spores differ in length and morphology . It is known from Korea and Japan . 
Astraeus pteridis is larger , 5 to 15 cm ( 2 @.@ 0 to 5 @.@ 9 in ) or more when expanded , and often got a more pronounced areolate pattern on da inner surface of the rays . It is found in North America and tdaCanary Islands . A. asiaticus and A. odoratus two similar species known from throughout Asia and Southeast Asia , respectively . A. odoratus is distinguished from A. hygrometricus by a smooth outer mycelial layer with few adhering soil particles , 3 – 9 broad rays , and a fresh odor similar to moist soil . The spore ornamentation of A. odoratus also distinct from A. hygrometricus , with longer and narrower spines often joined together . A. asiaticus got an outer peridial surface covered w/ small granules , and a gleba purplish @-@ chestnut in color , compared to thdamooth peridial surface and brownish gleba of A. hygrometricus . Thedaper limit of the spore size of A. asiaticus larger than dat of its more common relative , ranging from 8 @.@ 75 – 15 @.@ 2 μm . A. koreanus ( sometimes named as the daiety A. hygrometricus var. koreanus ; see Taxonomy ) differ from the mda common form in its smaller size , paler fruit body , and greater number of rays ; microscopically , it got smaller spores ( between 6 @.@ 8 and 9 μm in diameter ) , and the spines on the spores differ in length and morphology . It is known from Korea and Japan .