Citation: Benth., in Endl., Enum. Pl. Hügel 61 (1837).

Derivation: Greek myrios, very many; kephale head; referring to the numerous capitula in the compound heads.

Synonymy: Hyalolepis DC., Prod. 6:149 (1838); Polycalymma F. Muell. & Sonder ex Sonder, Linnaea 25:494 (1853);' Elachopappus F. Muell., Fragm. Phyt. Aust. 3:157 (1863).

Common name: None

Description:
Annual herbs with cobwebby non-glandular hairs; stems terete; leaves cauline, sessile, entire, alternate.

Inflorescence a terminal compound head of numerous capitula aggregated on a flat common receptacle, ovoid to biconvex; common involucre well-developed, multiseriate, of hyaline to scarious bracts often with conspicuous white laminae; capitula minute, homogamous, each subtended by a scarious-hyaline bract; capitular involucral bracts 2-5, equal or subequal, hyaline; florets 1-5 per capitulum, tubular, bisexual, 3-5-merous; corolla narrowly funnel-shaped, with acute equal lobes, yellow; anthers tailed at the base, with subulate apical appendages; style branches flattened, truncate with tufts of sweeping hairs or with dilated papillose apices.

Achenes subterete, smooth; pappus uniseriate, of plumose or simple bristles, a hyaline scale, or absent.

Distribution:  About 10 species in Australia; the genus is in need of revision, and apparently comprises 2 or 3 natural groups which are not closely related.

Biology: No text

Key to Species:

1. Compound heads 2-4 cm diam., with showy white bract laminae 5-8 mm long	M. stuartii 4.
1. Compound heads to 1.6 cm diam., with bract laminae to 2 mm long or absent
2. Leaves far exceeding the inflorescences; capitula 1-flowered	M. rhizocephalus 2.
2. Leaves not or hardly exceeding the inflorescences; capitula 4- or 5-flowered
3. Florets 3- or 4-merous; involucral bract apices subacute, hyaline	M. pluriflorus 1.
3. Florets 5-merous; involucral bract apices obtuse, usually opaque, white	M. rudallii 3.

Author: Not yet available