www.mobot.org Research Home | Search | Contact | Site Map  

North America
South America
General Taxonomy
Photo Essays
Training in Latin

Wm. L. Brown Center
Graduate Studies
Research Experiences
  for Undergraduates

Imaging Lab
MBG Press
Climate Change
Catalog Fossil Plants
Image Index
Rare Books

Res Botanica
All Databases
What's New?
People at MO
Visitor's Guide
Jobs & Fellowships
Research Links
Site Map


Browse by Keyword





A Grammatical Dictionary of Botanical Latin

-ys: nouns ending in -ys (sg. generally f. III)

1. The Greek word for mouse and also rat is mys, gen. sg. myos (s.m.III), a noun of the third Greek declension (related to Latin 'mouse:' mus, gen. sg. muris, q.v.) is sometimes rendered into Latin words ending in -mys.

The following is a paradigm made by adding the Latin Third Declension endings to the stem my-:

mys, gen.sg. myis (s.m.III), q.v., mouse, q.v. and rat.

singular plural singular plural Nom. mys myes Calomys Gen. myis [myum] [myium] Calomyis Dat. myi myibus Calomyi Acc. myem myes Calomyem Abl. mye myibus Calomye

myidion,-i (s.n.II), abl. sg. myidio, the diminutive of mys: little mouse (my-idion).

Calomys americanus, the deer-mouse; Oryzomys palustris, the rice-rat; Peromyscus californicus, a deer-mouse; Megamys patagonensis, a fossil rodent; Antechinomys laniger, the little jerboa.

NOTE: Steyskal (1969) used this noun to display "examples of irregularity in genitive endings [which] pertain to parasites whose specific names are formed from names of host-genera ending in the word 'mys.'"

The host genera were Apomys; Cynomys; Dipodomys; Dremomys; Heteromys; Hesperomys; Otomys; Phascolomys; Pitymys; Rhabdomys; Scotinomys; Thallomys; Thomomys; Zelotomys.

epithets: gen.sg. ending in -myis

gen.sg. endings (correct) gen.sg. endings (other) phascolomyis -mydis: dremomydis hesperomydis, otomydis, < thallomyis pitymydis [declined like -chlamys] -mysi cynomysi, thomomysi (mys + i) -myia otomyia (my + ia) -mius dipodomius (m + ius) -muris thomomuris (the gen.sg. of the Latin)

The Greek spelling is gen. myos; acc. myn; nom.pl. myes, acc. pl. myas, dat. pl. mysi and mysi(n), etc. indicating this noun is not of the sort with the genitive in -mydis. The majority of epithets were (incorrectly) composed in -mydis, however, and other variants.

2. Greek nouns ending in -us (upsilon), gen.sg. -udos, rendered into Latin as -ys, -ydis (s.f.III), abl.sg. -yde;

-chlamys,-ydis (s.f.III), mantle [> Gk. chlamys,-ydos, s.f.III a short cloak or mantle (Lat. paludamentum); see '-chlamys,-ydis: in Gk. comp.';

singular plural Nom. Coleochlamys Gen. Coleochlamydis Dat. Coleochlamydi Acc. Coleochlamydem Abl. Coleochlamyde

Aulacochlamys (alga); Basichlamys (alga); Coleochlamys (alga);

Ecdysichlamys (alga); Gloeochlamys (alga); Keriochlamys (alga);

Leptochlamys (alga); Lobochlamys (Chlorophyceae, Protist);

Nephrochlamys (alga); Oogamochlamys (Chlorophyceae, Protist);

Phaeoschizochlamys (alga); Pyramichlamys (alga); Schizochlamys (alga); Sklerochlamys (alga); Tetrachlamys (alga); Vitreochlamys (alga).

Chlamydia,-ae (s.f.I) (Chlamydiaceae, order Chlamydiales, class and phylum Chlamydiae). A genus of three species: Chlamydia trachomatis (of trachoma), C. suis (of pigs) and C. muridarum (of mice).

NOTE: -stachys,-ydis (s.f.III), spike, is an exception in that in Greek

the genitive is '-yos' (see next entry).

3. Greek nouns ending in -us (upsilon), gen. sg. -uos, rendered into Latin as -ys,-yis;

-pitys,-yis (s.f.III), pine-tree [> Gk. pitys,-yos, s.f.III, a pine-tree (Lat. pinus)].

singular plural Nom. Hypopitys (s.f.III) Gen. Hypopityis Dat. Hypopityi Acc. Hypopitym Abl. Hypopitye

Sciadopitys,-yis (s.f.III)

-botrys,-yis (s.m.III), cluster or bunch of grapes (Lat. racemus).

Gliobotrys; Heterobotrys; Hyalostachybotrys; Stachybotrys; see -botrys.

-drys,-yis (s.f.III), oak; Halidrys (genus of marine plants, alga); Phycodrys (alga); Pseudophycodrys (alga).

-pitys,-yis (s.f.III), pine.

EXCEPTION: botanical usage for Stachys L. (s.f.III) Horse-nettle, which would be Stachyis in the gen. sg., is rather Stachydis [> Gk. stachys,-yos (s.m.III), spike, an ear of corn [Lat. spica; note the Gk. noun is considered feminine in botanical usage];

singular plural singular plural Nom. -stachys -stachydes Nom. Stachys Gen. -stachydis -stachydum Gen. Stachydis Dat. -stachydi -stachydibus Dat. Stachydi Acc. -stachydem -stachydes Acc. Stachydem Abl. -stachyde -stachydibus Abl. Stachyde

Subfamily: Stachydoideae (Stachys,-ydis).

NOTE: Gk. compounds using stachys as a prefix or suffix may use stachy-, stachyo-; -stachys,-ydis; -stachyus,-a,-um; see stachy-.

4. Greek nouns rendered in Latin Third Delcension as -yx, gen. sg. -ychis: bostryx,-ychis (s.m.III) [Gk. bostryx, gen. sg. bostrychos (s.m.II), (note Gk. xi of nominative becomes chi in the other cases)];

singular plural singular plural Nom. bostryx bostryches Nom. Bostryx Gen. bostrychis bostrychum Gen. Bostrychis Dat. bostrychi bostrychibus Dat. Bostrychi Acc. bostrychem bostryches Acc. Bostrychem Abl. bostryche bostrychibus Abl. Bostryche

Bostryx,-ychis G. Targione-Tozzetti, a genus of algae.

5. Latin nouns of the Third Declension ending in -yx, gen. sg. -ycis;

singular plural

Nom. calyx calyces calyx (s.m.III) Gen. calycis calycumDat. calyci calycibus

Acc. calycem calyces Abl. calyce calycibus


A work in progress, presently with preliminary A through R, and S, and with S (in part) through Z essentially completed.
Copyright © P. M. Eckel 2010-2018

© 1995-2018 Missouri Botanical Garden, All Rights Reserved
4344 Shaw Blvd.
St. Louis, MO 63110
(314) 577-5100

Technical Support