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Volume IV (1988) - Flora of New Zealand Naturalised Pteridophytes, Gymnosperms, Dicotyledons
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Logfia Cass.

LOGFIA Cass.

Annual herbs. Lvs mostly alternate, sometimes lowermost few opposite, simple, entire. Capitula usually in small clusters, rarely solitary. Involucral bracts 4-5 in 1 row. Receptacle obconic; scales present, in 2-3 rows and appearing as bracts, star-like, at fruiting. Outer florets ♀, filiform; inner florets mostly ⚥, tubular. Achenes somewhat dimorphic, oblong to obovoid, gradually narrowed to apex; outer achenes slightly curved, enclosed in outer scales, lacking a pappus; inner achenes straight, free, with a pappus; pappus hairs in 1 row, narrow at apex.

Key

1
Cauline lvs linear, (5)-12-25 × 0.5-1-(1.5) mm; lvs subtending clusters of capitula clearly exceeding them
1. *gallica
Cauline lvs narrowly oblong-elliptic to narrowly ovate-lanceolate, 4-10 × 0.5-2 mm; lvs subtending clusters of capitula not exceeding them
2. *minima

c. 10 spp., Eurasia, N. Africa, N. America. Naturalised spp. 2.

Logfia is similar to Filago, but the 2 genera are easily distinguished at fruiting by the receptacular scales; these are aristate and remain erect in Filago, but are obtuse to acute and become patent and star-like in Logfia (Fig. 28).

Fruiting capitula of Logfia and Filago. A L. gallica; B F. pyramidata. © All rights reserved. [Image: 4X4K]
Fruiting capitula of Logfia and Filago. A L. gallica; B F. pyramidata. © All rights reserved. [Image: 4X4K]
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