Kalpana Kalpana

Luina

Updated on
Share on FacebookTweet on TwitterShare on LinkedIn
Kingdom  Plantae
Tribe  Senecioneae
Higher classification  Daisy family
Order  Asterales
Scientific name  Luina
Rank  Genus
Luina httpsuploadwikimediaorgwikipediacommonsthu
People also search for  Daisy family, Cacaliopsis, Thiseltonia

Luina vinternete


Luina, commonly called silverback, is a small genus of perennial shrubs in the groundsel tribe within the sunflower family.

Contents

The name of this genus is an anagram of the name of the flower genus Inula.

Luina ost


Description

These are large, bushy perennials, native to the Pacific Coast of North America (United States and Canada), growing on rock outcrops, cliffs, and talus slopes.

Their slender stems are covered with a gray, thick felt. They grow from a stout, branching, woody base, growing into clumps several meters across.

The leaves have an alternate arrangement, The leaf shape is lanceolate to ovate. The leaf margins are entire or dentate. The leaves are sessile in L. hypoleuca, but petiolate in L. serpentina. The leaves are glabrous above, but underneath thick with white hairs, giving it a silvery appearance. Hence its common name : silverback.

At the end of each stem there is an inflorescence with generally 4-12, flat-topped clustered flower heads. These are discoid, i.e. they contain only disc flowers and lack the ray flowers. The bracts under the flower head occur in 1-2 equal series. The receptacle is flat or convex. There are generally 11-23 bright yellow disc flowers, with a slightly expanded throat.

The glabrous or strigose fruit is 3-4 mm long. The pappus shows many bristles and is 8-10 mm long.

Species
  • Luina hypoleuca Benth. : Silverback Luina, Littleleaf Luina - British Columbia, Washington, Oregon, California (Lake Co to Del Norte Co)
  • Luina hypoleuca var. californica A.Gray
  • Luina hypoleuca var. dentata L.F.Hend.
  • Luina hypoleuca var. hypoleuca
  • Luina serpentina Cronquist : Colonial Luina, Creeping Silverback - Grant County in Oregon
  • formerly included

    see Cacaliopsis Prenanthes

  • Luina nardosmia (A.Gray) Cronquist - Cacaliopsis nardosmia (A.Gray) A.Gray
  • Luina stricta (Greene) B.L.Rob. - Prenanthes stricta Greene
  • References

    Luina Wikipedia


    Similar Topics
    Luina hypoleuca
    Ashok Banker
    Gift Motupa
    Topics