Family: Asteraceae
Craspedia
Citation:
Forster f., Fl. Inul. Aust. Prod. 58 (1786).
Derivation: Greek kraspedon, a hem or border; referring to the woolly fringes on the leaves of the type species.
Synonymy: Not Applicable Common name: Billybuttons.
Description:
Annual and perennial herbs with cobwebby non-glandular hairs; stems terete, leafy; leaves mostly cauline, alternate, flat, entire.
Inflorescence a terminal pedunculate compound head of numerous capitula aggregated on an elongated or rounded woolly general receptacle, globular to ellipsoid; common involucre shorter than capitula, often obscured or absent; capitula small, homogamous, discoid, each subtended by a scarious or partly herbaceous bract; capitular involucral bracts few, scarious-hyaline, oblanceolate to oblong, glabrous, caducous; receptacle with hyaline scales; florets 3-10, tubular, bisexual, 5-merous; corolla distally campanulate, longer than the bracts, with equal acute lobes, yellow; anthers tailed at the base with triangular apical appendages; style branches flattened, linear-oblong, truncate, glabrous.
Achenes terete, obovoid, usually sericeous; pappus of uniseriate plumose bristles thickened in the lower part.
Distribution:
|
About 12 species in Australia and New Zealand.
|
|
|
Biology:
No text
Key to Species:
|
1. Leaves with 3 prominent longitudinal veins |
|
C. globosa 3. |
|
1. Leaves with a single longitudinal vein |
|
|
|
2. Compound heads globose; involucral bracts and pappus bristles whitish |
|
C. glauca 2. |
|
2. Compound heads ovoid; involucral bracts and pappus bristles yellow-tipped |
|
|
|
3. Plant white-woolly; common involucre and capitulum-subtending bracts concealed |
|
C. chrysantha 1. |
|
3. Plant green, pubescent; common involucre and capitulum-subtending bracts visible in young heads |
|
C. pleiocephala 4. |
Author:
Not yet available
|