Difference between revisions of "Cirsium eatonii"
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{{Plant2000 | {{Plant2000 | ||
| − | |apex | + | |apex architecture or shape=spiny |
| − | |apex orientation=ascending | + | |apex orientation=ascending;spreading |
|apex position=outer | |apex position=outer | ||
| − | |apex shape=linear-acicular | + | |apex shape=linear-acicular;entire;plane;spine-tipped |
| − | |array architecture=subcapitate | + | |array architecture=subcapitate;spiciform;racemiform;branched |
|base orientation=short-appressed | |base orientation=short-appressed | ||
|blade shape=oblong | |blade shape=oblong | ||
| Line 12: | Line 12: | ||
|collar coloration=stramineous | |collar coloration=stramineous | ||
|collar variability=differentiated | |collar variability=differentiated | ||
| − | |corolla coloration=ochroleucous | + | |corolla coloration=ochroleucous;yellow;lavender;pink;purple |
|cypsela coloration=brown | |cypsela coloration=brown | ||
| − | |face architecture=winged-petiolate | + | |face architecture=winged-petiolate;sessile |
|face arrangement=distributed | |face arrangement=distributed | ||
| − | |face count=present | + | |face count=present;many |
| − | |face | + | |face external texture=glabrous;villous;glabrous;villous |
|face other=principal | |face other=principal | ||
| − | |face position=adaxial | + | |face position=adaxial;basal;cauline;distal |
| − | |face size=reduced | + | |face size=reduced;reduced |
| − | |head architecture=sessile | + | |head architecture=sessile;short-pedunculate |
|head arrangement=crowded | |head arrangement=crowded | ||
| − | |head orientation=erect | + | |head orientation=erect;nodding |
| − | |involucre coloration=green | + | |involucre coloration=green;suffused with dark-c-purple;purple |
| − | |involucre | + | |involucre external texture=villous;tomentose |
| − | |involucre shape=ovoid | + | |involucre shape=ovoid;campanulate |
|involucre width=wider | |involucre width=wider | ||
| − | |lobe arrangement=spaced | + | |lobe arrangement=spaced;spaced |
| − | |lobe | + | |lobe arrangement or shape=linear |
|margin arrangement=overlapping | |margin arrangement=overlapping | ||
| − | |margin shape=undulate | + | |margin shape=undulate;unlobed;spiny-dentate;pinnatifid;lance-oblong;triangular;3-lobed;spiny-dentate |
| − | |midvein | + | |midvein external texture=arachnoid-tomentose |
|phyllary size=subequal | |phyllary size=subequal | ||
|ridge width=narrow | |ridge width=narrow | ||
| − | |stem architecture=simple | + | |stem architecture=simple;branched;branched |
| − | |stem | + | |stem external texture=glabrous;villous;tomentose;glabrate |
| − | |stem | + | |stem internal texture=fleshy |
| − | |stem orientation=erect | + | |stem orientation=erect;ascending |
|tip position=exserted | |tip position=exserted | ||
|tooth arrangement=spaced | |tooth arrangement=spaced | ||
| − | |trichome architecture=septate | + | |trichome architecture=septate;septate;septate;septate;non-septate |
| − | |trichome | + | |trichome external texture=arachnoid-tomentose |
| − | | | + | |whole organism life style=perennial |
| − | + | ||
}} | }} | ||
Cirsium eatonii is a polymorphic species widely distributed in a high elevation archipelago across the central Rocky Mountains and the Intermountain Region. During Pleistocene glacial episodes, the progenitors of this species complex undoubtedly occupied lower elevation sites and likely had more contiguous populations. Post-glacial isolation of these populations in allopatric high elevation sites has allowed them to differentiate to a greater or lesser extent. Prehistoric or recent introgressive hybridization with other thistle species probably has contributed to the diversification of the complex (R. J. Moore and C. Frankton 1965). Several of the races recognized here as varieties have been treated in the past as species (e.g., C. clokeyi, C. peckii). Their current geographic isolation and more or less distinctive features might support such recognition, but application of this approach across the complex would result in a proliferation of microspecies. | Cirsium eatonii is a polymorphic species widely distributed in a high elevation archipelago across the central Rocky Mountains and the Intermountain Region. During Pleistocene glacial episodes, the progenitors of this species complex undoubtedly occupied lower elevation sites and likely had more contiguous populations. Post-glacial isolation of these populations in allopatric high elevation sites has allowed them to differentiate to a greater or lesser extent. Prehistoric or recent introgressive hybridization with other thistle species probably has contributed to the diversification of the complex (R. J. Moore and C. Frankton 1965). Several of the races recognized here as varieties have been treated in the past as species (e.g., C. clokeyi, C. peckii). Their current geographic isolation and more or less distinctive features might support such recognition, but application of this approach across the complex would result in a proliferation of microspecies. | ||
Latest revision as of 23:56, 18 February 2014
Cirsium eatonii is a polymorphic species widely distributed in a high elevation archipelago across the central Rocky Mountains and the Intermountain Region. During Pleistocene glacial episodes, the progenitors of this species complex undoubtedly occupied lower elevation sites and likely had more contiguous populations. Post-glacial isolation of these populations in allopatric high elevation sites has allowed them to differentiate to a greater or lesser extent. Prehistoric or recent introgressive hybridization with other thistle species probably has contributed to the diversification of the complex (R. J. Moore and C. Frankton 1965). Several of the races recognized here as varieties have been treated in the past as species (e.g., C. clokeyi, C. peckii). Their current geographic isolation and more or less distinctive features might support such recognition, but application of this approach across the complex would result in a proliferation of microspecies.
Facts about "Cirsium eatonii"
