They are fingerlike holes caused by internal corrosion and distributed irregularly.
取样解剖后发现,穿孔多为手指状的直孔,几乎都由内壁点腐蚀引起.
互联网
Sterigma ( pl . sterigmata ) A fingerlike projection upon which spores are formed in most basidiomycete fungi.
担孢子梗:是大多数担子菌所具有的指状突起结构,其上着生担孢子.
"digitate leaves of the horse chestnut"
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