Walter Max Zimmerman

German botanist (1892-1980).

Walter Max Zimmermann (May 9, 1892 – June 30, 1980) was a German botanist and systematist. Zimmermann’s notions of classifying life objectively based on phylogenetic methods and on evolutionarily important characters were foundational for modern phylogenetics. Though they were later implemented by Willi Hennig in his fundamental work on phylogenetic systematics, Zimmermann's contributions to this field have largely been overlooked. Zimmermann also made several significant developments in the field of plant systematics such as the discovery of the telome theory. The standard botanical author ab

Abbreviations: W.Zimm.
Occupations: university teacher, paleontologist, botanist
Citizenships: Germany
Languages: German
Dates: 1892-05-09T00:00:00Z – 1980-06-30T00:00:00Z
Birth place: Walldürn
Direct attributions: 4 plants, 0 fungi
Authorship mentions: 7 plants, 0 fungi

4 plants attributed, 3 plants contributed to7 plants:

Polypodiopsida (Fern) Cronquist, Takht. & W.Zimm.
plant class in the phylum tracheophyta
The ferns (Polypodiopsida or Polypodiophyta) are a group of vascular plants (land plants with vascular tissues such as xylem and phloem) that reproduce via spores and have neither seeds nor flowers. They differ from non-vascular plants (mosses, hornworts and liverworts) by having specialized transport bundles that conduct water and nutrients from and to the roots, as well as life cycles in which the branched sporophyte is the dominant phase. Ferns have complex leaves called megaphylls that are more complex than the microphylls of clubmosses. Most ferns are leptosporangiate ferns that produce
Polypodiidae (Leptosporangiate Fern) Cronquist, Takht. & W.Zimm. 1966
plant subclass
The Polypodiidae, commonly called leptosporangiate ferns, formerly Leptosporangiatae, are one of four subclasses of ferns, the largest of these being the largest group of living ferns, including some 11,000 species worldwide. The group has also been treated as the class Pteridopsida or Polypodiopsida, although other classifications assign them a different rank. Older names for the group include Filicidae and Filicales, although at least the "water ferns" (now the Salviniales) were then treated separately. The leptosporangiate ferns are one of the four major groups of ferns, with the other
Pinidae Cronquist, Takht. & W.Zimm. 1966
plant subclass
Pinidae is a subclass of Equisetopsida in the sense used by Mark W. Chase and James L. Reveal in their 2009 article "A phylogenetic classification of the land plants to accompany APG III." This subclass comprises the conifers. The Pinidae subclass is equivalent to the division Pinophyta and class Pinopsida of previous treatments. There are over 600 species of Pinidae all over the world.
Pulsatilla montana ssp. bulgarica (C.Rosenthal) W.Zimm. 1958
plant subspecies in the ranunculaceae family
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Pinophyta (Coniferae) Cronquist, Takht. & W.Zimm. ex Reveal 1996
plant phylum
Conifers are a group of vascular plants and a subset of gymnosperms. They are primarily perennial, woody trees and shrubs, mostly evergreen with a regular branching pattern, reproducing with male and female cones, usually on the same tree. They are wind-pollinated and the seeds are usually dispersed by the wind. Taxonomically, they make up the division Pinophyta, also known as Coniferae. All extant conifers, except for the gnetophytes, are perennial woody plants with secondary growth. There are over 600 living species. Conifers first appear in the fossil record over 300 million years ago in
Magnoliophyta (Angiosperm) Cronquist, Takht. & W.Zimm. ex Reveal 1980
plant phylum
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× Neotinorchis doellii (W.Zimm.) B.Bock 2012
plant hybrid species in the orchidaceae family
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