Wikipedia
Hemileccinum is a genus of fungi in the family Boletaceae. It was erected in 2008 by Josef Šutara to contain two species united by common morphological features; H. depilatum and the type H. impolitum. In 2014, Wu et al. found it to be distinct from other bolete genera in a molecular phylogenetic study and found it to be most closely related to Corneroboletus. In 2015, H. subglabripes was transferred to Hemileccinum from Boletus based on DNA evidence.
Morphological Features of Xerocomoid Boletes
Boletus s.str.
Hemileccinum
Xerocomellus
Xerocomus s.str.
Spore Surface
Smooth
Smooth
Longitudinally striated or smooth, never bacilate
Bacilate
Hymenophoral trama
Boletoid type with gelatinous lateral strata
Boletoid type with gelatinous lateral strata
Intermediate between boletoid and phylloporoid when fully developed with distinct but weakly gelatinous lateral strata
Phylloporoid type with nongelatinous lateral strata
Pileipellis
Trichoderm, sometimes collapsing, rarely ixotrichoderm or other
Initially trichoderm but collapses with age
Initially palisadoderm, typically encrusted
Initially a trichoderm, never encrusted
Lateral stipe stratum
Frequently gelatinous, 60-90 μM thick, thicker than that of Xerocomellus
Similar to that of Leccinum species, ornamented with stipe scabrousities up to 400-640 μM thick
Frequently not present, reduced to no more than 30-40 μM thick, not gelatinous
Lateral stipe stratum never gelatinous and 80-200 μM thick