LACTUCA

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The common head and leaf lettuces of home gardens and commerce are derived from Lactuca sativa.

Facts about "LACTUCA"
apex shapeobtuse + and acute +
array architecturecorymbiform + and paniculiform +
beak fragilitystout +
beak shapefiliform +
blade shapeorbiculate +, ovate +, oblong +, lanceolate +, oblanceolate +, linear + and filiform +
body shapecompressed +, flattened +, elliptic + and oblong +
bractlet shapedeltate + and lanceolate +
bristle architecturebarbellulate +, smooth +, barbellate + and simple +
bristle colorationwhite +
bristle variabilityequal +
chromosome count9 +
corolla colorationyellow +, bluish + and whitish +
corona colorationwhite + and fuscous +
corona positionsubtending +
corona relieferose +
corona variabilityequal +
cypsela colorationbrown +, tan +, whitish +, purplish + and blackish +
face external textureglabrous +, hairy + and setose +
face reliefrugulose +
head arrangementsingly + and in corymbiform to paniculiform arrays +
involucre shapecampanulate + and cylindric +
leaf architecturesessile + and petiolate +
leaf positionbasal + and cauline +
margin external texturescarious +
margin shapeentire +, denticulate + and lobed +
pappus durationpersistent +
pappus sizeminute +
peduncle architecturebracteate +
peduncle shapeinflated +
phyllary shapelanceolate + and linear +
phyllary sizesubequal +
phyllary variabilityto equal +
receptacle architectureepaleate +
receptacle external textureglabrous +
receptacle reliefpitted +
receptacle shapeflat + and convex +
series count2 +
series orientationerect + and reflexed +
series variabilityintergrading +
stem architecturebranched +
stem count1 +
stem external textureglabrous +, hairy +, hispid + and setose +
stem orientationerect +
whole organism architecturetaprooted +
whole organism life styleannual + and biennial +