isidiumn.

/ʌɪˈsɪdɪəm/

Forms: Plural isidia.

Etymology: < modern Latin generic name Isidium (E. Acharius Lichenographiae Suecicae Prodromus (1798) 87), formerly used to include all lichens bearing isidia, < Isis, Isid-em, Isis (in reference to her disc and horns).

Botany.

One of a number of coral-like or wart-like elevations or excrescences of the thallus in certain lichens, having the function of soredia.

ΘΚΠ

the world > plants > particular plants > lichen > [noun] > part(s) of

pelt1759

pelta1760

scutellum1760

scyphus1777

shield1796

podetium1814

apothecium1830

cistella1832

rhizine1832

scypha1832

soredium1836

amphigastria1842

gonidium1845

macrogonidium1853

hypothallus1855

crustaceous lichens1856

pycnide1856

perianth1857

isidium1866

thamnium1866

endospore1875

perigynium1882

pseudocyphella1882

thecium1882

parathecium1921

soralium1921

1866 J. Lindley & T. Moore Treasury Bot. II. 629/2 Isidium, a coral-like elevation of the thallus of a lichen, bearing a globule at its end.

1882 J. M. Crombie in Encycl. Brit. XIV. 557/2 Nylander observes..that the isidia in the Collemacei..‘show very clearly under the microscope the entire history of the evolution of the thallus’.

Derivatives

iˈsidial adj. of or pertaining to an isidium.

ΘΚΠ

the world > plants > particular plants > lichen > [adjective] > of or characterized by parts

angiocarpous1835

tartareous1839

nucleiform1840

gonidial1845

variolarioid1845

hypothalline1855

gonidic1856

gymnocarpous1856

isidioid1856

gonimic layer1857

nucleiferous1857

glebulose1866

heteromerous1875

homoeomerous1875

crustose1879

scyphose1879

apothecial1882

soredial1882

placodioid1911

isidial1921

isidiate1959

1921 A. L. Smith Lichens iii. 150 The centre of the isidial tuft [of Umbilicaria pustulata] may fall out.

1970 Lichenologist IV. 216 Further development of the isidial initials leads to a definite dorsi-ventral organization.

iˈsidiate adj.

ΘΚΠ

the world > plants > particular plants > lichen > [adjective] > of or characterized by parts

angiocarpous1835

tartareous1839

nucleiform1840

gonidial1845

variolarioid1845

hypothalline1855

gonidic1856

gymnocarpous1856

isidioid1856

gonimic layer1857

nucleiferous1857

glebulose1866

heteromerous1875

homoeomerous1875

crustose1879

scyphose1879

apothecial1882

soredial1882

placodioid1911

isidial1921

isidiate1959

1959 U. K. Duncan Guide to Study of Lichens 7 P[armelia] crinita... Resembles an isidiate form of P. trichotera.

1962 Lichenologist II. 3 P[armelia] reddenda is a pseudo~cyphellate species with peculiar granular or granular-isidiate outgrowths on the upper surface.

1967 M. E. Hale Biol. Lichens i. 22 It is not apparent that isidiate species hold any advantage over non-isidiate species.

isidiiferous adj.

/aɪˌsɪdɪˈɪfərəs/ [see -ferous comb. form, -phorous comb. form]

ΚΠ

1882 J. M. Crombie in Encycl. Brit. XIV. 556/1 On the margin of the thallus of isidiiferous states of Peltigera canina.

Categories »

isidiophorous adj.

/aɪˌsɪdɪˈɒfərəs/ [see -ferous comb. form, -phorous comb. form] bearing isidia.

isidioid adj.

/aɪˈsɪdɪɔɪd/

ΘΚΠ

the world > plants > particular plants > lichen > [adjective] > of or characterized by parts

angiocarpous1835

tartareous1839

nucleiform1840

gonidial1845

variolarioid1845

hypothalline1855

gonidic1856

gymnocarpous1856

isidioid1856

gonimic layer1857

nucleiferous1857

glebulose1866

heteromerous1875

homoeomerous1875

crustose1879

scyphose1879

apothecial1882

soredial1882

placodioid1911

isidial1921

isidiate1959

1856 W. L. Lindsay Pop. Hist. Brit. Lichens 43 The isidioid thallus resembles the tartareous in being usually pale or whitish.

1857 M. J. Berkeley Introd. Cryptogamic Bot. 418 Many other forms are assumed by the crusts of Lichens;..the isidioid, in which the thallus is broken up into short erect cylindrical projections.

1882 J. M. Crombie in Encycl. Brit. XIV. 554/1 This isidioid condition in crustaceous thalli is the basis of the old pseudo-genus Isidium.

1887 New Sydenham Soc. Lexicon Isidioid,..applied to those lichens which are covered with a dense mass of conical soredia.

1921 A. L. Smith Lichens iii. 149 In the genus [sc. Isidium] were included the more densely isidioid states of various crustaceous species.

Categories »

isidiˈose adj. resembling or of the nature of an isidium; characterized by or provided with isidia.

This entry has not yet been fully updated (first published 1900; most recently modified version published online March 2022).

单词	isidium
释义	isidiumn. /ʌɪˈsɪdɪəm/ Forms: Plural isidia. Etymology: < modern Latin generic name Isidium (E. Acharius Lichenographiae Suecicae Prodromus (1798) 87), formerly used to include all lichens bearing isidia, < Isis, Isid-em, Isis (in reference to her disc and horns). Botany. One of a number of coral-like or wart-like elevations or excrescences of the thallus in certain lichens, having the function of soredia. ΘΚΠ the world > plants > particular plants > lichen > [noun] > part(s) of pelt1759 pelta1760 scutellum1760 scyphus1777 shield1796 podetium1814 apothecium1830 cistella1832 rhizine1832 scypha1832 soredium1836 amphigastria1842 gonidium1845 macrogonidium1853 hypothallus1855 crustaceous lichens1856 pycnide1856 perianth1857 isidium1866 thamnium1866 endospore1875 perigynium1882 pseudocyphella1882 thecium1882 parathecium1921 soralium1921 1866 J. Lindley & T. Moore Treasury Bot. II. 629/2 Isidium, a coral-like elevation of the thallus of a lichen, bearing a globule at its end. 1882 J. M. Crombie in Encycl. Brit. XIV. 557/2 Nylander observes..that the isidia in the Collemacei..‘show very clearly under the microscope the entire history of the evolution of the thallus’. Derivatives iˈsidial adj. of or pertaining to an isidium. ΘΚΠ the world > plants > particular plants > lichen > [adjective] > of or characterized by parts angiocarpous1835 tartareous1839 nucleiform1840 gonidial1845 variolarioid1845 hypothalline1855 gonidic1856 gymnocarpous1856 isidioid1856 gonimic layer1857 nucleiferous1857 glebulose1866 heteromerous1875 homoeomerous1875 crustose1879 scyphose1879 apothecial1882 soredial1882 placodioid1911 isidial1921 isidiate1959 1921 A. L. Smith Lichens iii. 150 The centre of the isidial tuft [of Umbilicaria pustulata] may fall out. 1970 Lichenologist IV. 216 Further development of the isidial initials leads to a definite dorsi-ventral organization. iˈsidiate adj. ΘΚΠ the world > plants > particular plants > lichen > [adjective] > of or characterized by parts angiocarpous1835 tartareous1839 nucleiform1840 gonidial1845 variolarioid1845 hypothalline1855 gonidic1856 gymnocarpous1856 isidioid1856 gonimic layer1857 nucleiferous1857 glebulose1866 heteromerous1875 homoeomerous1875 crustose1879 scyphose1879 apothecial1882 soredial1882 placodioid1911 isidial1921 isidiate1959 1959 U. K. Duncan Guide to Study of Lichens 7 P[armelia] crinita... Resembles an isidiate form of P. trichotera. 1962 Lichenologist II. 3 P[armelia] reddenda is a pseudo~cyphellate species with peculiar granular or granular-isidiate outgrowths on the upper surface. 1967 M. E. Hale Biol. Lichens i. 22 It is not apparent that isidiate species hold any advantage over non-isidiate species. isidiiferous adj. /aɪˌsɪdɪˈɪfərəs/ [see -ferous comb. form, -phorous comb. form] ΚΠ 1882 J. M. Crombie in Encycl. Brit. XIV. 556/1 On the margin of the thallus of isidiiferous states of Peltigera canina. Categories » isidiophorous adj. /aɪˌsɪdɪˈɒfərəs/ [see -ferous comb. form, -phorous comb. form] bearing isidia. isidioid adj. /aɪˈsɪdɪɔɪd/ ΘΚΠ the world > plants > particular plants > lichen > [adjective] > of or characterized by parts angiocarpous1835 tartareous1839 nucleiform1840 gonidial1845 variolarioid1845 hypothalline1855 gonidic1856 gymnocarpous1856 isidioid1856 gonimic layer1857 nucleiferous1857 glebulose1866 heteromerous1875 homoeomerous1875 crustose1879 scyphose1879 apothecial1882 soredial1882 placodioid1911 isidial1921 isidiate1959 1856 W. L. Lindsay Pop. Hist. Brit. Lichens 43 The isidioid thallus resembles the tartareous in being usually pale or whitish. 1857 M. J. Berkeley Introd. Cryptogamic Bot. 418 Many other forms are assumed by the crusts of Lichens;..the isidioid, in which the thallus is broken up into short erect cylindrical projections. 1882 J. M. Crombie in Encycl. Brit. XIV. 554/1 This isidioid condition in crustaceous thalli is the basis of the old pseudo-genus Isidium. 1887 New Sydenham Soc. Lexicon Isidioid,..applied to those lichens which are covered with a dense mass of conical soredia. 1921 A. L. Smith Lichens iii. 149 In the genus [sc. Isidium] were included the more densely isidioid states of various crustaceous species. Categories » isidiˈose adj. resembling or of the nature of an isidium; characterized by or provided with isidia. This entry has not yet been fully updated (first published 1900; most recently modified version published online March 2022). < n.1856
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