Omalotheca Cassini in F. Cuvier (Q2686)

From Canadian Flora Commons
Jump to navigation Jump to search
Omalotheca is a taxon with the rank genus within the tribe Gnaphalieae
Language Label Description Also known as
English
Omalotheca Cassini in F. Cuvier
Omalotheca is a taxon with the rank genus within the tribe Gnaphalieae

    Statements

    taxon/id/Omalotheca Cassini
    0 references
    Omalotheca Cassini
    Omalotheca
    Cassini
    FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 19: Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York.
    accepted
    Mostly Eurasian
    three species reaching North America in native distribution (Omalotheca sylvatica perhaps not native)
    three species reaching North America in native distribution (see below)
    Stems usually 1, erect (branched from bases or distally, woolly-tomentose to sericeous).
    blades mostly narrowly lanceolate to oblanceolate, bases cuneate, margins entire, faces bicolor or concolor, abaxial white to gray, thinly tomentose, adaxial white to grayish and sericeous to thinly woolly or greenish and glabrate.
    Heads disciform, in spiciform or subcapitate arrays.
    Involucres campanulate to turbinate, 5–6 mm.
    Phyllaries in 2–3 series, stramineous to brownish (sometimes mottled; hyaline, stereomes not glandular), unequal, chartaceous toward apices.
    Receptacles flat to concave, smooth, epaleate.
    Peripheral (pistillate) florets 35–70+ (more numerous than bisexual);
    corollas purplish or whitish.
    Inner (bisexual) florets 3–4;
    corollas purplish or whitish, distally purplish or reddish.
    Cypselae obovoid to cylindric or fusiform, sometimes slightly compressed, faces strigillose (hairs not myxogenic, lengths 6–12 times diams.) and papillate (carpopodia forming minute stipes);
    pappi falling readily, of 15–25 distinct (falling separately) or basally connate (falling together), barbellate bristles in 1 series.