Carlo Luigi Spegazzini or Carlos Luis Spegazzini, Italian-born Argentine botanist, mycologist and explorer (Bairo, Torino Province 20 April 1858 – La Plata 01 July 1926)

Authored about 320 papers

Described a new variety of rubber

La verdenasquina, nueva variedad de caucho. Anales Soc. Cien. Arge. 78:71-3, 1914

Described Puccinia arachidis, causative agent of peanuts rust

Described the tobacco rust (1888) independent from Farlow (1885)

Described Septoria lycopersici, causal agent of septoriosis or Septoria spot

Described Pasmo, a disease of flax (1909)

First reported citrus leprosis (1920)

Other fungi causing diseases in plants

Ustilago paraguayensis (loose smut of Bermuda grass)

Cintractia peribebuyensis (smut of Cyperus)

Meliola malacotricha (black mildew of Dichondra)

Coccostromopsis palmicola

Ravenelia platensis (rust of Erythrina)

Phyllosticta erythraeae with Saccardo

Asterina silvatica

Asterina ampullipeda (black soody of Haynaldia)

Macabuna malvicola (rust of Hibiscus mutabilis)

Meliola arachnoidea

Meliola brasiliensis (black mildew of Schinus terenbitifolia)

Puccinia opulenta (red of Ipomoea)

Puccinia macropoda (rust of Iresine)

Aecidium jussieae (rust of Jussiaea)

Puccinia arechavaletae (rust of Lonchocarpus)

Pestalotiopsis leprogena (brown blotch of Musa sapientum)

Drepanoconis larvaeformis

Glomerella tucumanensis (red rot of Saccharum officinarum)

Asterina peraffinis

Asterina vagans

Pucciniosira pallidula (rust of Triumfetta semitriloba)

Prospodium tecomicola (rust of Tabebuia serratifolia)

Aecidium verbenae (rust of Verbena litoralis)

Puccinia rugosa (rust of Vernonia)

Colletotrichum annonicola (anthracnose of custard apple)

Phyllosticta sacchari (leaf spot of sugar cane)

Phyllachora tropicalis 

DESCRIBED PLANTAE & FUNGI TAXA

Fungi

Genera

About 180 (at least 115 valid)

Species

About 3,000

Plantae (about 1,000 taxa)

Valid Genera

Ameghinoa 1897

Anadenanthera 1923

Benthamiella 1883

Chiovendaea 1916

Delpinophytum 1903

Halophytum 1902

Lecanophora 1926

Maihueniopsis 1925

Notiosciadium 1924

Oxyosmyles 1901

Pantacantha 1902

Parodia 1923

Philippiella 1897

Ramorinoa 1924

Schickendantziella 1903

Subgenera

9 in Stipa (1903)

Species

About 635

Fossil Plantae (1924)

Ameghinoites

Carolites

Florentinites

Romeroites

HONORS 

Spegazzinia Saccardo 1880 (Fungi)

Neospegazzinia Petrak 1936 (Fungi)

Spegazzinites Felix 1894 (Fossil Fungi)

Spegazziniophytum Esser 2001 (Euphorbiaceae)