630 THE GENUS HYSTERIUM AND SOME OF ITS ALLIES. 
enel’s herbarium, marked H. depressum B. and C. Other spores 
in the same specimen were one-fourth less in size. ith these , 
figures and the following brief synopsis, there will be little diffi- f 
culty, I think, in identifying the usual forms. q 
HYSTERIUM. 
A. is ag simple, colorless, minute (Aporia of Duby). 
. Hysterium herbarum Fr. Spores minute, DORES, ppoe 
x. Fr. in Schw. Herb.) 
B. Spores filiform, colorless or greenish, lying side by side m Dandies, often appar- 
vane without an investing sheath or ascus. ea Sporomega, Cocco 
and Co ene g of Duby.) 
2. i pee astri Schrad. . H. griseum Schw. 
3. aan rundinacearum Schr. ne parities pointed B. & C. 
4. 
laleucu gyz Fr. 10. s Schw. 
apáta ; iy, H ainei Schw. 
ën vost sch Pe 
T H dr teal Fr. 
very obscur: os em are almost ¢ certainly immature or aborted forms, an 
pa oy would lose een it the whole were reduced to H. arundinacearum ae H. fo oii. 
C. Boorse ai simple, colorless, elongate, often curved and sausage-shaped. 
he ng a Spores colorless, 0015 inch long. (Fig. 20.) (Spec. ex Kunze in 
13. m scirpinum Fr. Spores colorless, 0018 inch i (5p. ex Fr. in Schw. Herb.) 
14. H. corni Schw. Spores rod-like, straight, .002 inch lo 
(Spec. ox Kunze in Schw. Herb 
15. H. Swit Schw. Spores subfusiform, colorless, .0005 inch long, in long ¢ 
ase 
D. Spores uniseptate. 
smilacis Schw. Spores colorless, -aie * Cepia .001-.0013 inch long, with a 
gelatinous envelope when young. (Fi 
Curtisii Duby, is probably the same. ) 
17. H. varium Fr. Spores brown, opake, fusiform, subacuminate, .003 inch long. 
18. H. Sor Fr. iin ieee colorless, ovoid or obovate, sometimes constricted in the 
e, .0005 i 
19. H. aa Blox. Spores at one end elongate and hyaline, the rest dark 
-.0007 inch long. (Fig. 17.) 
E. ro A inept 
a yes — Fr. Spores dirty brown, terminal loculi often clearer or colorless, 
ng. 
21. A. riag eea Schw. Spores bro .0008 inc areg 
22. H. tortile Schw. Spores brownish, labor vate, 0008 | long. 
23. H. flexuosum Schw. In the specimen in the Schweintz Herbarium, the spores 
the distinctive flexuose poras are identical ie those of H. pulicare. in 
' ecia the mg are —_ 0015 i inch long. 
24. H. biforme Fr. Spores ye mo: id oe 001 - 3 inch long, sometimes CON- ' 
= P ape ots a apis or toru “be 
R rostii Duby ores es sub orm, .0065 inch long. 
26. H.rufulum Fr. (reid dium of Sprenge Oy booed’ at first reddish brown, after- 
wards dark, 001 ~.0014 inch lo ong. 
or ce 
F. A tiseptate, ar. 
i : Ok t ores curved, yellow, multiseptate, obtuse or subacumi- 
: m ong. 
pe Tor our Jo Schw. Spores dark yellow brown, 5-7 septate, 0011 inch long; third 
. H. Mi ag pat Bante’ hw. a shore s dark yellow brown, curved, subpyriform, multiseptate, 
Mg Ë. p es Sewo G ed ing nd -5 septate, .0008- .0012 inch long. 
n i Pers. Spores dark k brown, elliptic or subpyriform, cellular, -0015 
inch long. (Spec. ex Seu) : 
32. = St sn dees Schw. Spores yellowish, broadly obovate, cellular, .0012 ine 
88. H avis um Schw. Spores dark ake, constricted in the middle with 
distinct cope 0015 - .002 mer dong, ene "each halt pera 
H. elon Wullr. Spores bpyriform, cellular, 
ees yed long (Spee: ex ex Trip ty ages E OE ; with 
H. depressum s dark, Bus brown, cymbiform, cellular, 
eg l distinct septum, like? H. vulvatum, .003- ,0045 inch long. (Spec. in Rav. 
