PlantNET Home PlantNET Home | Search NSW Flora | Contact Us  
FloraOnline
Introduction
Plant Name Search
Index Search
Spatial Search
Identification Keys
Classification
Glossary
HerbLink (Type Images)
WeedAlert
Other PlantNET Sites
Other Data Sources
NEW SOUTH WALES FLORA ONLINE Printable Page

Genus Helminthotheca Family Asteraceae

Description: Annual to perennial taprooted herbs; with short 3–5-fid hooked rigid non-glandular hairs and/or spines (some with hooks), bases expanded; stems terete, usually solitary, branched above.

Leaves basal and cauline, alternate, flat, margins ± toothed to pinnatisect.

Heads in loose terminal corymbs, few to numerous, cylindrical; involucral bracts herbaceous, in 2 rows, outer row ovate and leaf-like, inner row longer and lanceolate with spiny tip; receptacle flat, naked, pitted. Florets all ligulate, numerous, bisexual, fertile; ligule linear. Anthers sagittate at base, apical appendage minute.

Achenes terete, usually ribbed, transversely wrinkled, with a sharply defined filiform beak; pappus of plumose bristles, in 1 row, with a few shorter outer barbellate bristles.


Distribution and occurrence: World c. 5 species, Europe, Asia, Africa. Australia: 1 species (naturalized).

Text by E. A. Brown
Taxon concept:

One species in NSW: Helminthotheca echioides

  Privacy | Copyright | Disclaimer | About PlantNET | Cite PlantNET