1. Basidiospores usually longer than 15 μm	2
1. Basidiospores shorter than or equal to 15 μm	4
2. Stipe covered with pruinose or granulose, but without any trace of reticulation	S. amygdalinus
2. Stipe covered with reticulation	3
3. Basidia lacrymoid, Q = 1.5–2.1	S. lacrymibasidiatus
3. Basidia clavate, Q = 2.0–2.6	S. subamygdalinus
4. Surface of stipe rough, but without reticulation	5
4. Stipe covered with reticulation	6
5. Stipe covered with distinct pruinose, basidiospores less than 14 μm, basidia broad clavate	S. adonis
5. Stipe covered with reddish to brown granules, basidiospores can be longer than 14 μm, hymenophoral basidia clavate	S. queletii
6. Stipe covered with prominent, red to orange reticulation. Basidiospores 11–14 × 4.5–6 μm	S. luridus
6. Stipe with indistinctly or finely reticulation, usually distributed erratically	7
7. Q value higher than 2.6	S. mendax
7. Q value less than or equal to 2.6	8
8. Basidiospores dextrinoid, Q value can reach 2.6, reticulation yellow and fine at the upper portion of stipe	S. atlanticus
8. Q value less than or equal to 2.2, pores red to orange red, stipe covered with very fine yellow, pale orange, orange, reddish orange, or pale red granules	S. comptus