Page:Manual of the New Zealand Flora.djvu/318

A. Heads large, 1–3 in. diam., solitary or racemed.
* Heads radiate, very large, solitary on a long naked peduncle.
Leaves 4–6 in. long, oblong or obovate, entire. Heads 2–3 in. diam.	1. O. insignis.
** Heads radiate, solitary on bracteate peduncles (racemed in O. Traillii).
Leaves 1½–2½ in., linear or linear-lanceolate. Peduncle slender. Rays purple	2. O. semidentata.
Leaves 1–3 in., elliptic-lanceolate to oblong-obovate. Peduncles slender. Rays purple or white	3. O. chathamica.
Leaves 2–4 in., obovate-lanceolate. Peduncles stout; bracts numerous, short, close-set. Rays white; disc-florets yellow	4. O. operina.
Leaves 3–5 in., narrow-lanceolate. Peduncles stout; bracts lax, long, foliaceous. Rays white; disc-florets purple	5. O. angustifolia.
Leaves 3–6 in., lanceolate or obovate-lanceolate. Heads racemed. Rays white; disc-florets purple	6. O. Traillii.
*** Heads discoid, racemed.
Leaves 2–6 in., obovate or obovate-oblong, acutely serrate	7. O. Colensoi.
Leaves 4–8 in., orbicular-ovate, doubly crenate	8. O. Lyallii.
B. Heads small, 1/6–1/2 in. diam., panicled or corymbose (solitary in O. nummularifolia). Florets 6–24.
* Leaves opposite.
Leaves 1½–2½ in., oblong. Panicles axillary. Heads discoid	9. O. Traversii.
Leaves 2–4 in., elliptic-lanceolate. Heads radiate	10. O. Buchanani.
** Leaves alternate, large, 1½–4 in. long (less in O. suavis), ovate to oblong, more rarely linear-oblong or oblong-lanceolate, entire or toothed or waved.
Leaves 2–4 in., ovate-oblong, obtuse, coriaceous, shining beneath. Florets 6–12	11. O. furfuracea.
Dwarf shrub. Leaves 1–2 in., oblong-ovate, excessively coriaceous, silvery beneath. Heads ½ in. diam. Florets 15–20	12. O. Alloniii.
Leaves 1½–3 in., broadly ovate, acute, rather thin, satiny beneath. Florets 15–20	13. O. nitida.
Leaves 2–4 in., broadly ovate, coriaceous, sharply and coarsely toothed	14. O. macrodonta.
Leaves 2–4 in., linear-oblong or lanceolate, coriaceous, spinous-toothed	15. O. ilicifolia.
Leaves 2–6 in., broadly ovate, rather thin, toothed, white with soft tomentum beneath	16. O. Cunninghamii
Leaves 1½–3½ in., oblong-lanceolate, acute, obscurely sinuate-dentate	17. O. excorticata.
Leaves ¾–1½ in., linear-oblong or oblong, obtuse, entire or obscurely sinuate	18. O. suavis.
*** Leaves alternate, 3–7 in. long, linear or narrow-linear; lateral veins conspicuous beneath, at right angles to the midrib.
Leaves 3–7 in., ½–1 in. broad, linear or narrow-linear, ferruginous beneath	19. O. lacunosa.
Leaves 5–6 in., ¼ in. broad, very narrow-linear	20. O. alpina.