Harry Delbert Thiers was an American mycologist who studied and named many fungi native to North America, particularly California. Thiers taught mycology at San Francisco State University. He comprehensively revised and expanded on the North American collection of boletes and named many new species.
Leccinum manzanitae is an edible species of bolete fungus in the family Boletaceae. Described as new to science in 1971, it is commonly known as the manzanita bolete for its usual mycorrhizal association with manzanita trees. Its fruit bodies (mushrooms) have sticky reddish to brown caps up to 20 cm (8 in), and its stipes are up to 16 cm (6.3 in) long and 3.5 cm (1.4 in) thick. They have a whitish background color punctuated with small black scales known as scabers. Found only in the Pacific Northwest region of the United States and Canada, it is the most common Leccinum species in California. The mushroom is edible, although opinions vary as to its quality. L. manzanitae can be usually distinguished from other similar bolete mushrooms by its large size, reddish cap, dark scabers on a whitish stipe, and association with manzanita and madrone.
Leccinum subatratum is a species of bolete fungus in the family Boletaceae. It was described as new to science in 1968 by mycologists Alexander H. Smith, Harry Delbert Thiers, and Roy Watling.
Leccinum subrobustum is a species of bolete fungus in the family Boletaceae. It was described as new to science in 1968 by mycologists Alexander H. Smith, Harry Delbert Thiers, and Roy Watling.
Leccinum subspadiceum is a species of bolete fungus in the family Boletaceae. It was described as new to science in 1968 by mycologists Alexander H. Smith, Harry Delbert Thiers, and Roy Watling.
Leccinum truebloodii is a species of bolete fungus in the family Boletaceae. It was described as new to science in 1968 by mycologists Alexander H. Smith, Harry Delbert Thiers, and Roy Watling.
Leccinum vinaceopallidum is a species of bolete fungus in the family Boletaceae. It was described as new to science in 1968 by mycologists Alexander H. Smith, Harry Delbert Thiers, and Roy Watling.
Leccinum barrowsii is a species of bolete fungus in the family Boletaceae. It is found in the southwestern United States, where it grows on the ground under conifers. The bolete was described as new to science in 1966 by mycologists Alexander H. Smith, Harry Delbert Thiers, and Roy Watling. The specific epithet honours the collector, Charles "Chuck" Barrows (1903–1989).
Leccinum boreale is a species of bolete fungus in the family Boletaceae. The bolete was described as new to science in 1966 by mycologists Alexander H. Smith, Harry Delbert Thiers, and Roy Watling.
Leccinum broughii is a species of bolete fungus in the family Boletaceae. Found in the United States, it was described as new to science in 1971 by mycologist Alexander H. Smith and Harry Delbert Thiers.
Leccinum brunneum is a species of bolete fungus in the family Boletaceae. Found in the Sierra Nevada region of California, it was described as new to science in 1971 by mycologist Harry Delbert Thiers.
Leccinum colubrinum is a species of bolete fungus in the family Boletaceae. It was described as new to science in 1968 by mycologists Alexander H. Smith, Harry Delbert Thiers, and Roy Watling.
Leccinum idahoense is a species of bolete fungus in the family Boletaceae. It was described as new to science in 1968 by mycologists Alexander H. Smith, Harry Delbert Thiers, and Roy Watling.
Leccinum insolens is a species of bolete fungus in the family Boletaceae. It was described as new to science in 1968 by mycologists Alexander H. Smith, Harry D. Thiers, and Roy Watling. The variety brunneomaculatum was also described by these authors.
Leccinum armeniacum is a species of bolete fungus in the family Boletaceae. Found in the United States, it was described as new to science in 1971 by Harry Delbert Thiers.
Leccinum ambiguum is a species of bolete fungus in the family Boletaceae. Found in the United States, it was described as new to science in 1971 by mycologists Alexander H. Smith and Harry Delbert Thiers.
Leccinum areolatum is a species of bolete fungus in the family Boletaceae. Found in the United States, it was described as new to science in 1971 by mycologists Alexander H. Smith and Harry Delbert Thiers. Josef Šutara proposed a transfer to Krombholziella in 1982.
Leccinum aurantiellum is a species of bolete fungus in the family Boletaceae. Found in the United States, it was described as new to science in 1971 by Harry Delbert Thiers.
