ONCOSIPHON

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Oncosiphon suffruticosum (Linnaeus) Källersjö [Matricaria suffruticosa (Linnaeus) Druce] was collected on ballast at Portland, Oregon, in 1902. It differs from O. piluliferum by smaller (3–5 mm diam.) heads clustered in dense, ± flat-topped, corymbiform arrays. Both O. piluliferum and O. suffruticosum are common weeds in their native southern Africa and in Australia. Both have the potential to become serious pests in western North America. They are unpalatable to livestock and tend to dominate infested pasturelands. When consumed by animals, they taint the flavor of milk and meat.

Facts about "ONCOSIPHON"
array architecturecorymbiform +
blade arrangement or shapelinear +
blade shapeovate +, obovate + and lobed +
cell shapequadrate +
cell sizelarge +
chromosome count6 + and 8 +
corolla colorationwhite + and yellow +
cypsela shapecolumnar +, prismatic + and tapered +
face external texturepuberulent +, strigillose + and glabrous +
face patterngland-dotted +
floret architecturepistillate +
floret count0 +
floret reproductionfertile + and bisexual +
hair fixationbasifixed +
head architecture or arrangementradiate +
head architecture or shapediscoid +
head arrangementsingly + and in corymbiform arrays +
involucre shapehemispheric + and cylindric +
involucre widthbroader +
lamina shapeobovate +
leaf architecturepetiolate + and sessile +
leaf arrangementalternate +
leaf positioncauline +
lobe count4 +
lobe shapetriangular +
margin external texturescarious +
margin shapeentire +
pappus shapecoroniform +, dentate + and entire +
phyllary behaviourfalling +
phyllary durationpersistent +
phyllary fusiondistinct +
phyllary orientationreflexed +
phyllary shapelance-triangular +, ovate +, elliptic +, navicular + and carinate +
phyllary sizeunequal +
portion architecturecontinuous +
portion fragilityfragile +
portion fusiondistinct +
portion orientation or shapeoblique +
portion shapedilated + and campanulate +
portion sizeconstricted +
receptacle architectureepaleate +
receptacle prominence or shapeflat +
receptacle reliefmuricate +
receptacle shapehemispheric +, globose + and conic +
rib count4 +
stem architecturebranched +
stem external texturepuberulent +, strigillose + and glabrous +
stem orientationerect + and ascending +
stem patterngland-dotted +
tube architecturecontinuous +
tube fragilityfragile +
tube fusiondistinct +
tube orientation or shapeoblique +
tube shapecylindric +, decurrent + and dilated +
tube sizeconstricted +
whole organism life styleannual +
whole organism odorscented +