Fungi Key – Austroboletus

FIELD KEY TO THE SPECIES OF AUSTROBOLETUS
Note: this key requires you to determine the following characters for your specimen:
Cap: colour, size, viscidity, and whether the cap margin overhangs the pores (appendiculate) or not.
Stipe: presence or absence of reticulation and a ring and colour.
Pores: colour.
Spores: size, ornamentation and Q-value (length ÷ width).
Key

1.	Cap white, ochraceous cream, ivory or pink, stipe concolourous	2
1.	Cap distinctly coloured, olive, tan, brown or red-brown, stipe concolorous or not	4
2.	Cap dry or slightly tacky, up to 115 mm diameter, cream to ochraceous cream; spores 15.5 – 17.7 × 4.4 – 5.5 µm	Austroboletus eburneus
2.	Cap viscid; up to 55 mm diameter, white, cream or pink	3
3.	Cap white with pale pinkish tinges, spores 11 – 14 × 6 – 7 µm	Austroboletus roseialbus
3.	Cap pure white, spores 17 – 19 × 5.5 – 6 µm	Austroboletus niveus
4.	Cap red or olive green	5
4.	Cap some shade of brown	7
5.	Cap viscid and red at first, soon dry and becoming orange or yellow or brown, stipe with ring	Austroboletus mutabilis
5.	Cap green	6
6.	Cap viscid and olive green at first, drying yellowish brown, reticulum yellowish brown	Austroboletus viscidoviridis
6.	Cap dry and green, reticulum green	Austroboletus austrovirens
7.	Cap red-brown and distinctly viscid	Austroboletus lacunosus
7.	Cap mid-brown, ochraceous or pale sienna, not distinctly viscid	8
8.	Stipe tall and < 15 mm diameter and stipe reticulum brown	Austroboletus sp ‘Brown’
8.	Stipe > 15 mm diameter and stipe reticulum white or two-tone	9
9.	Cap yellow-brown and reticulum white	Austroboletus yourkae
9.	Cap mid- to dark brown and reticulum pale at apex and brown below	10
10.	Cap with concolorous margin, spores Q = ±2	Austroboletus occidentalis
10.	Cap with pale appendiculate margin, spores Q ? 3	Austroboletus asper