AGOSERIS

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Agoseris consists of widespread species that individually exhibit great morphologic plasticity. Difficulty in correctly identifying individual specimens is compounded by traits that may vary from region to region, the perpetuation of misleading or inaccurate traits in the literature, and the presence of intermediates. Correct identification of Agoseris specimens can be assisted by knowing that species may exhibit variable traits (e.g., pubescence, corolla color, cypsela morphology), some species have leaf lobing variable on single plants (e.g., outermost entire versus inner lobed), and intermediate specimens may occur with any sympatric taxa. Hybridization among members of the genus is common, especially among polyploid taxa, and some hybrid populations appear to be persistent. Autogamy has been demonstrated in some species (K. L. Chambers 1963) and is suspected in others. It appears to be correlated with a reduction in corolla and anther size. Autogamous populations or taxa often exhibit seemingly unique features that appear localized. Attempts at naming these variant populations or regional phases have resulted in a large number of synonyms.

Facts about "AGOSERIS"
apex colorationpurple-black +
apex shapeobtuse + and acuminate +
blade shapelinear-lanceolate + and spatulate +
bristle architecturebarbellate +
bristle colorationwhite +
bristle fusiondistinct +
bristle shapeflattened +
bristle sizesubequal +
calyculus count0 +
chromosome count9 +
corolla colorationyellow +, purple +, orange +, pink + and red +
corolla conditiondrying +
cypsela architecturemonomorphic +
cypsela colorationwhite +, tan + and purple +
cypsela habitdimorphic +
cypsela positionoutermost +
cypsela shapecolumnar +, fusiform +, conic + and obconic +
face architecture or exudationstipitate-glandular +
face external textureglabrous +, glaucous +, pubescent +, tomentose +, hairy +, puberulent + and hirsute +
face lengthelongating +
face orientationouter +, squarrose + and erect +
face positioninner +
face shapebeaked +
floret charactermatutinal +
head arrangementsingly +
involucre shapecylindric + and hemispheric +
leaf architecturepetiolate +
leaf positionbasal + and cauline +
lobe architecture or courseirregular +
lobe arrangementopposite + and subopposite +
lobe shapefiliform + and spatulate +
lobule count1 +
lobule orientationacroscopic +
lobule shapetriangular +
margin architecture or shapeciliate +
margin external texturescarious +, glabrous + and lanate +
margin samevariable +
margin shapeentire +, toothed +, pinnatifid + and dentate +
midstripe colorationpurple-black +
palea shapelinear-lanceolate + and acuminate +
palea sizeaccrescent +
pappus durationpersistent +
peduncle architectureebracteate +
peduncle shapeinflated +
petiole architecture or shapesheathing +
petiole colorationpurplish +
petiole orientationerect + and prostrate +
phyllary colorationgreen +, purple + and black +
phyllary external texture or internal textureherbaceous +
phyllary shapelanceolate +, ovate + and obovate +
phyllary sizeunequal + and subequal +
receptacle architecturepaleate +
receptacle external textureglabrous +
receptacle prominence or shapeflat +
receptacle reliefpitted +
rib count10 +
spot colorationpurple-black +
stem architecturesimple +
stem count0 +
stem habitdecumbent +
stem orientationerect +
whole organism architectureacaulescent +, taprooted + and with caudices +
whole organism life styleannual +, perennial + and plant +