UROPAPPUS

From Botanical Knowledge
Jump to: navigation, search


Uropappus lindleyi was placed in Microseris (K. L. Chambers 1955) because of two allotetraploid species formed by hybridization with annual members of that genus. A number of morphologic features, including narrow, acuminate leaves with villous-ciliate margins, erect heads, relatively long outer phyllaries, cypselae often short-beaked, and pappi of white, lustrous scales suggest a connection with Nothocalaïs, especially N. troximoides. Phylogenetic studies of chloroplast DNA variation (R. K. Jansen et al. 1991b; J. Whitton et al. 1995) link Uropappus with Nothocalaïs and Agoseris as a sister clade to Microseris. Consequently, Jansen et al. separated Uropappus from Microseris and placed the two allotetraploid species in Stebbinsoseris.

Facts about "UROPAPPUS"
apex shapeacuminate +, long-tapering +, acute + and notched +
arista architecture or external texture or reliefsmooth +
beak height or lengthshort +
blade colorationreddish + and purplish +
blade shapelinear + and lanceolate +
calyculus count0 +
chromosome count9 +
corolla colorationyellow + and reddish +
cypsela colorationblack +, brown +, gray + and paler +
cypsela positionouter +
cypsela shapecolumnar +, fusiform + and narrowed +
face external textureglabrous + and crisped +
fruit life stagemature +
head arrangementsingly +
internode architectureacaulescent +
involucre shapefusiform + and ovoid +
leaf architecturepetiolate +
leaf positionbasal +
margin architectureclasping +
margin architecture or shapewhite-villous-ciliate +
margin external texturescarious +
margin shapeentire +, lobed + and dentate +
pappus behaviourfalling +
peduncle architectureebracteate +
peduncle orientationerect +
peduncle shapeinflated +
phyllary height or lengthshorter +
phyllary positionouter + and inner +
phyllary shapelanceolate +
phyllary sizeunequal +
phyllary variabilityequal +
receptacle architectureepaleate +
receptacle external textureglabrous +
receptacle reliefpitted +
receptacle shapeflat + and convex +
rib count10 +
rib external texturehispidulous +
rib external texture or reliefscabrous +
scale colorationwhite +
scale count5 +
scale fusiondistinct +
scale reflectancelustrous +
scale shapelanceolate + and aristate +
stem architecturebranched +
stem orientationerect +
whole organism architectureacaulescent + and taprooted +
whole organism external textureglabrous +, farinose + and white-villous +
whole organism life styleannual + and plant +