(Guzmán & J. M. Trappe) Ram.-Cruz & Guzmán (2012)
Deconica semiinconspicua is a mushroom native to the state of Washington in the United States. The mushroom is small, rare, difficult to see and, according to Guzmán and Trappe (2005), stains blue where damaged. However, Ramírez-Cruz et al. (2012) state that it is "without a really observable bluing reaction".  It was described as a psychoactive species of Psilocybe in section Semilanceatae, but Ramírez-Cruz et al. (2012) found that its macroscopic and microscopic morphological features and its DNA sequence, which Ramírez-Cruz et al. did not publish, were a better match for Deconica. Ramírez-Cruz et al. (2012) also stated that it is very similar to Deconica montana. It can be mistaken for Psilocybe silvatica and can be distinguished by its more conic cap, narrower spores and narrower cheilocystidia.
The stipe is 15–20 x 2 mm, hollow, has an equal width, and is white with whitish or brownish floccose scales, drying to a reddish brown. It stains blue near the base according to Guzmán and Trappe (2005). Ramírez-Cruz et al. (2012) state that it is "without a really observable bluing reaction". 
- Ramírez-Cruz, Virginia; Guzmán, Gastón; Guzmán-Dávalos, Laura (2012). "New Combinations in the genus Deconica (Fungi, Basidiomycota, Agaricales)". Sydowia 64: 217–219.
- Guzmán, Gastón; Trappe, James M. (2005). "The Hallucinogenic and Nonhallucinogenic Species of the Genus Psilocybe Fayod (Basidiomycotina) in Washington State, USA: New Records and a New Species". International Journal of Medicinal Mushrooms 7: 583–590.