| Illustration of characters |
| 1- Ascal apical apparatus not blueing in Melzer's reagent
(I-), or blueing very weakly |
2 |
| 1- Ascal apical apparatus
blueing
in Melzer's reagent (I+) |
4 |
| |
| 2- Ascal apical apparatus turning
pale red brown
in Lugol's solution; ascospores
10-14 x 4-5.5 µm |
N. serpens |
| 2- Ascal apical apparatus blueing in Lugol's solution; ascospores 14-18
x 5.5-7.5 µm |
3 |
| |
| 3- Stromata usually enclosing more than ten perithecia |
N. aenea var. aureolutea |
| 3- Stromata uniperitheciate or enclosing few perithecia |
N. sp. FC-435 |
| |
| 4- Ascospores
dark brown
|
5 |
| 4- Ascospores
pale
to
medium brown
|
9 |
| |
| 5- Stromata on coniferous needles; ascospores with a
hyaline sheath
|
"Hypoxylon"
terricola |
| 5- Stromata on woody substrate; ascospores lacking a hyaline sheath |
6 |
| |
| 6- Ascospores with a
conspicuous germ slit
spore-length |
7 |
| 6- Ascospores with a short, less conspicuous germ slit |
N. atropurpurea |
| |
| 7- Stromata
uniperitheciate
or enclosing few perithecia, more or less immersed; ascospores
16-23 x 8-11 µm |
N. confluens |
| 7- Stromata
multiperitheciate,
superficial; ascospores 9.5-13.5 x
5-6 µm |
8 |
| |
| 8- Perithecial mounds
conspicuous
|
N. carbonacea |
| 8- Perithecial mounds
inconspicuous
|
N. diffusa |
| |
| 9- Ascospores longitudinally striate |
N. chestersii |
| 9- Ascospores smooth |
10 |
| |
| 10- Ascospores averaging less than 8 µm long |
N. effusa |
| 10- Ascospores averaging between 10-14 µm long |
11 |
| 10- Ascospores averaging between (13-) 14-20 µm long |
18 |
| 10- Ascospores averaging more than 20 µm long |
N. gwyneddii |
| |
| 11- Ascospores averaging less than 4 µm broad |
N. illita |
| 11- Ascospores averaging more than 4 µm broad |
12 |
| |
| 12- Ascospores with the
germ slit on the more convex side
|
13 |
| 12- Ascospores with the
germ slit on the less convex side
|
14 |
| |
| 13- Stromata half-immersed in the wood, basal tissue absent |
N. sp. PL-820725-01 |
| 13- .Stroma superficial, with conspicuous
white basal tissue
|
N. sp. JV |
| |
| 14- Stromata mostly
uniperitheciate,
more or less
immersed
in the
wood |
N. maritima |
| 14- Stromata
multiperitheciate effused,
|
15 |
| |
| 15- Stromatal surface squamulose, with reticulate cracks |
N. sp. JF-02150 |
| 15- Stromatal surface smooth, lacking reticulate cracks |
16 |
| |
| 16- Ascospores pale brown, with broadly rounded ends and inconspicuous germ
slit |
N. serpens var. colliculosa |
| 16- Ascospores medium brown, with narrowly rounded ends and fairly conspicuous germ
slit |
17 |
| |
| 17- On wood |
N. sp. PL-971115-01 |
| 17- Usually fungicolous (Polypores, Hydnum) |
N. serpens var. hydnicola |
| |
| 18- Germ slit conspicuous; white tissue beneath the perithecia lacking |
N. aenea |
| 18- Germ slit inconspicuous; with conspicuous
white tissue
beneath the perithecia |
N. aenea var. macrospora |
| |
