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Volume I (1961) - Flora of New Zealand Indigenous Tracheophyta - Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledons
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Gnaphalium L.

GNAPHALIUM L., 1753

Capitula small, solitary, clustered or corymbose, heterogamous; phyll. imbricate, in several series; receptacle plane to alveolate. Outer florets pistillate, ∞, filiform, minutely toothed; inner perfect, fewer, tubular. Anther-cells produced at base into filiform tails; style-arms of disk-florets nearly terete, truncate to capitate. Achenes not ribbed. Pappus-hairs in one series, caducous. Annual to perennial herbs with alt., entire lvs. Genus of cosmopolitan distribution, with c. 150 spp. Of the N.Z. spp. 1 is widespread elsewhere, 3 occur in Australia, the others are endemic.

Key

1
Tips of inner phyll. spreading, white, forming a distinct pseudo-ray
2
Tips of inner phyll. not forming a pseudo-ray
5
2
Lvs strongly revolute, making lamina linear in outline; branches rather stiff and rigid
3. subrigidum
Lvs not or only slightly revolute, lamina not linear in outline; branches not stiff or rigid
3
3
Lvs, most or all, < 3 cm. long, obovate-spathulate, branchlets prostrate
4. hookeri
Lvs, most or all, much > 3 cm. long, lanceolate to oblanceolate, branchlets ascending
4
4
Lvs of narrow-lanceolate order, acute; pair of lateral veins obscure
2. keriense
Lvs of broad-oblanceolate order, apiculate; pair of lateral veins distinct
1. trinerve
5
Capitula solitary, terminal
6
Capitula congested, forming compound heads
8
6
Lvs glab. or nearly so above; capitula not > c. 5 mm. diam.
6. paludosum
Lvs densely tomentose above; capitula c. 8-12 mm. diam.
7
7
Lvs up to 3 cm. or more long, tomentum white
5. traversii
Lvs not > 1 cm. long, tomentum brown, glistening
7. nitidulum
8
Compound capitula ∞, without involucre of foliaceous bracts
8. luteo-album
Compound capitula solitary or few, with involucre of foliaceous bracts
9
9
Plant with creeping rhizome or stolons, forming patches; perennial
10. collinum
Plant not creeping, not forming patches; annual
9. involucratum
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