Prenanthes racemosa

From Botanical Knowledge
Jump to: navigation, search


Prenanthes racemosa is recognized by its erect, stout, simple habit, glaucous stems, spatulate proximal leaves with broadly winged petioles and rounded to obtuse apices, heads borne in narrow racemiform arrays, purple and hairy phyllaries, and usually pinkish corollas. It is most similar to P. aspera, which differs in its generally smaller stature, more hirsute stems, leaves that are hispid abaxially, proximal leaves usually withered by flowering, and creamy white or yellow corollas. Hybrids between P. racemosa and P. trifoliolata, known as P. ×mainensis, occur in the northeastern United States and southeastern Canada (see discussion under P. trifoliolata).

Facts about "Prenanthes racemosa"
apex shapeobtuse + and rounded +
array architectureracemiform + and paniculiform +
base architectureclasping +
base shapeattenuate +
blade external texture or internal texturecoriaceous +
blade shapeoblanceolate + and spatulate +
bractlet colorationgreen + and purple +
bractlet count8 +
bractlet shapetriangular-subulate +
calyculus external texturesetose +
chromosome count16 +
corolla colorationpinkish +, white + and lavender +
cypsela architecture or shape8-12-ribbed +
cypsela colorationbrown +
cypsela shapesubcylindric + and subterete +
face architecturesessile + and clasping +
face external textureglabrous +
face positionmid cauline + and distal +
face sizereduced +
flowering timeaugsep +
habitatsandy alluvial soils of stream banks , wet meadows , tall-grass prairies , fens , marshy flats , bogs ( mainly calcicolous , at least in north ) +
head architectureracemiform + and paniculiform +
head orientationascending +
head shapeelongate +
involucre shapecampanulate +
leaf countpresent +
leaf other or positionproximal +
margin external texturescarious + and setose +
margin shapeentire + and denticulate +
pappus colorationyellow +
petiole architecturewinged +
phyllary colorationgreen + and purple +
phyllary shapelanceolate + and linear +
stem architecturesimple +
stem colorationgreen + and purple +
stem external textureglabrous +, glaucous +, setose + and hispid +
stem fragilitystout +
stem orientationerect +
taproot architecturetuberous +
taproot shapefusiform +
whole organism life styleplant +