Taraxacum alaskanum

From Botanical Knowledge
Jump to: navigation, search
















































































































































































































































































































































































[[leaf count::10]| ]]

In all the specimens examined from Alaska, it is not possible to find consistent differences between Taraxacum alaskanum and T. kamtschaticum (as applied in Alaska; or T. pseudokamtschaticum). Assignment to one or the other species appears random. The leaf character used in keys to separate the entities does not work, or at least is not matched by specimens as determined; cypsela color varies within species, and the slight difference noted is not sufficient to warrant separation. Neither is there a significant size difference between coastal and inland material. The name T. sibiricum Dahlstedt has been applied mistakenly by American authors to this entity.

Facts about "Taraxacum alaskanum"
apex shapeobtuse +, acute +, acuminate +, caudate + and long-acuminate +
base shapeattenuate +
beak fragilitystout +
blade shapeoblanceolate +, oblong + and runcinate +
body shapeoblanceoloid +
bracklet shapeovate +, lance-ovate + and elliptic +
calyculus colorationpurplish +
calyculus orientationspreading + and reflexed +
calyculus shape or vernationto revolute +
chromosome count24 + and 32 +
cone shapeconic +
corolla colorationyellow +, gray-striped + and purplish +
corolla positionouter +
cypsela colorationmaroon +, brown + and grayish +
face external textureglabrous +
face relieftuberculate + and muricate +
flowering timesummer +
habitatalpine slopes + and tundra , arctic tundra rich arctic seaside bluffs +
habitat inclinesloped +
involucre colorationgreen + and purplish +
involucre external textureglaucous +
involucre shapecylindro + and campanulate +
leaf colorationgreen +
leaf orientationhorizontal + and patent +
line shapedecurrent +
lobe coursestraight +
lobe orientationretrorse + and antrorse +
lobe shapetriangular +
margin colorationhyaline +
margin external texturescarious +
margin life stageyounger +
margin shapelobed +, toothed + and denticulate +
pappus colorationwhite + and yellowish +
petiole sizeslender + and decurrent lines +
phyllary shapelanceolate +
rib count15 + and 6 +
rib prominenceprominent +
rib widthnarrow +
series count2 + and 3 +
stem colorationpurplish +
stem external textureglabrous + and glabrate +
stem orientationascending +
taproot architecturebranched +
terminal shapeacuminate +, acute-rounded + and toothed +
terminal sizelargest +
tip architecture or shapehornless +
tip colorationpurplish + and grayish +
tip external texturescarious +
tip relieferose +
tip shapeflaring + and flared +
tooth count0 +
tooth shapetriangular +
whole organism count16 +
whole organism life styleplant +