Hymenogaster and related genera.pdf - MykoWeb

636 ANNALS OF THE MISSOURI BOTANICAL GARDEN
[VOL. 21
35. Spores ovoid-citriform to ellipsoid-eitriform,' exospore thick, coarsely
roughened, 15-18.5 x 9.5-11.5,g .......................... H. niveus (p. 654)
36. Spores utriculate ...........................................
37
36. Spores not utriculate ....................... 41
37. Spores less than 11 ., broad . . ................ 38
37. Spores more than 11 / broad . ..............................................
39
38. Spores ellipsoidal, 12-16 x 5-7 ................. H. disciformis (p. 658)
38. Spores ovoid-citriform, 13-15 x 8-10 g ............ H. zeylandius (p. 676)
38. Spores ellipsoid-citriform, 14.5-17 x 9.6-11 g ......... H. albellus (p. 669)
38. Spores ellipsoid, 16-19. x 6-10 g .......................... H. cerews (p. 677)
39. Gleba lilac, becoming fuliginous; young spores obtuse-rounded above,
18-24 x 12-14 .......................................H. lilacinus (p. 660)
39. Gleba some shade of gray or brown, drying snuff-brown .................. 40
40. Spores definitely verrucose, covered by a smooth utricle, 20-26 x
12-15 /,u ellipsoid, apiculus if present short, broad. .H. ocoidentalis (p. 668)
40. Spores smooth, covered by a miore or less roughly wrinkled, loose utriele,
young spores guttulate, fusiform, with long or capitate apiculus,
29-42 x 11-14 1, mature spores guttulate, oblong with both ends
rounded, utricle prominently loosely wrinkled, 19-29 x 12-14 ,........
...............................
...............- . Holivaceus (p. 661)
41. Spores more than 8 ,u broad, smooth, clear yellow, mostly ovoid, 18-22 x
9-11 A .. . H. luteu (p. 677)
41. Spores 9.5-11 , broad, roughened by small short ridges, ovoid............
.............................................
H. McMurphhyi (p. 658)
41. Spores less than 8 , broad, mostly obovoid or subspherical .. . 42
42. Spores broadly obovoid-ellipsoid to subspherical, slightly pedicellate,
smooth, but slightly asperulate at the distal end, 8-9 x 5.5-6 u.
.............................................H.
levisporus (p. 678)
42. Spores broadly obovoid-ellipsoid, attenuated below, minutely verrueose
with rather distinct warts at the- distal end, 8-11 x 5.5-7.5 t..........
................. ................................. H. Remnyi (p. 679)
42. Spores ovoid to oblong, 10-12 x 6 f ................. H. Maideni (p. 679)
1. HYMENOGASTER RUBER Harness, Proc. Cal. Acad. Sci. Bot.
III. 1: 246. 1899; Saco. & Sydow in Sacc. Syll. Fung. 16: 254.
1902.
Hymenogaster versicolor Harkness, Proc. Cal. Acad. Sci.
Bot. III. 1: 245. 1899; Sace. & Sydow in Saco. Syll. Fung. 16:
254.1902.
Type: cotypes in Dudley Herb. at Stanford Univ.
Fructifications 1 x 2 x 4 cm., subspherical to oblong, white,
becoming pale red and turning purple when touched, dark
reddish in alcohol, surface flocculose; peridium varying greatly
in thickness, about 320-1000 jf thick, the outer portion (about
half) composed of coarse, stupose, thick-walled, intertwined