Olearia Moench

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

OLEARIA Moench, 1802

Type sp.: O. tomentosa (Wendl.) DC.

Capitula small to large, solitary, or infl. variously compound; receptacle alveolate, flat or convex; phyll. imbricate in several series, margins dry or scarious. Ray-florets, if present, ligulate to filiform, pistillate; disk-florets perfect, tubular. Anther-cells us. acute at base; style-arms of disk-florets flattened, with short obtuse or acute unreceptive tips. Achenes ribbed or striate, us. pubescent to pilose; pappus of unequal barbellate bristles, often slightly thickened at tips. Shrubs or trees with alt. or opp. lvs, these mainly tomentose below. About 130 spp., mainly of N.Z. and Australia, with a few in Lord Howe Id and New Guinea; the N.Z. spp. endemic.

SYNOPSIS

I.
- Leaves alternate
- A.
- - Capitula solitary
  - 1.
  - - Capitula large, ray-florets conspicuous; lvs large:
    - 1. angustifolia, 2. oporina, 3. chathamica, 4. semidentata
  - 2.
  - - Capitula small, ray-florets inconspicuous; lvs small:
    - 9. nummularifolia
- B.
- - Capitula racemed, large, without ray-florets; lvs large:
  - 5. colensoi, 6. lyallii
- C.
- - Capitula corymbosely panicled
  - 1.
  - - Florets solitary in capitulum:
    - 7. paniculata, 8. coriacea
  - 2.
  - - Florets few to many in capitulum
    - (a)
    - - Florets not > 6 per capitulum:
      - 11. avicenniaefolia, 12. albida
    - (b)
    - - Florets > 6 per capitulum
      - (1)
      - Lvs of linear order, with strong lateral veins ┴ midrib:
        22. ilicifolia, 23. lacunosa, 24. crosby-smithiana
      - (2)
      - Lvs not of linear order, lateral veins weaker, at obtuse or acute angle to midrib
        α
        Tomentum soft, cobwebby, not lustrous:
        10. moschata, 26. rani
        ß
        Tomentum thin, appressed, ± lustrous
        (i)
        Phyllaries 35 or more:
        20. pachyphylla
        (ii)
        Phyllaries much fewer
        *Lvs
        Lvs closely and very sharply toothed:
        21. macrodonta
        **Lvs
        Lvs distantly toothed or entire
        ┼Lvs
        Lvs < 1cm. long:
        16. capillaris
        ┼┼Lvs
        Lvs much > 1cm. long:
        13. allomii, 14. arborescens, 15. cheesemanii, 17. furfuracea, 18. thomsonii, 19. townsonii
- D.
- - Capitula fascicled:
  - 25. fragrantissima
II.
- Leaves opposite
- A.
- - Capitula large, panicled; lvs large:
  - 27. buchananii, 28. traversii
- B.
- - Capitula small, fascicled or solitary; lvs small:
  - 29. odorata, 30. hectori, 31. virgata, 32. solandri

Key

Lvs opp. or in opp. fascicles

Lvs alt. or in alt. fascicles, sts imbricate

Capitula in terminal panicles, often corymbose

Capitula axillary, solitary or fascicled

Capitula with distinct ray of ligulate florets

27. buchananii

Capitula without a distinct ray

28. traversii

Lvs broad-elliptic, > 10 mm. broad, distinctly petioled

30. hectori

Lvs of linear to narrow-elliptic order, not > 7 mm. broad, sessile or subsessile

Lvs yellow-tomentose below, capitula solitary

32. solandri

Lvs white- or buff-tomentose below, capitula fascicled

Phyll. glandular-viscid; lvs narrow-obovate

29. odorata

Phyll. not glandular-viscid; lvs of linear order

31. virgata

Capitula solitary

Capitula in compound infl.

Lvs entire, not > 1·5 cm. long

9. nummularifolia

Lvs toothed, not < 3 cm. long

Disk-florets yellow

2. oporina

Disk-florets purple

Peduncles stout, bracts foliaceous; rays white

1. angustifolia

Peduncles slender, bracts small; rays purple to white

Lvs of elliptic-lanceolate to oblong-obovate order; ray-florets us. white

3. chathamica

Lvs of narrow-lanceolate order; ray-florets purple

4. semidentata

Capitula with tubular florets only

Capitula with at least some ligulate ray-florets

Infl. a raceme; capitula large; florets us. ∞, dark red to dark brown; lf-teeth distinct

Infl. a panicle; capitula small; florets few, white or yellow; lvs entire or obscurely toothed

Bracts of infl. scarious, slightly cottony-tomentose at tips

5. colensoi

Bracts of infl. foliaceous, green above, densely buff-tomentose below

6. lyallii

Florets 2-4 or more per capitulum, lvs of lanceolate order

11. avicenniaefolia

Florets 1 per capitulum, lvs of broad-oblong order

Lvs rather thinly coriac., ± 3-5 cm. long, margins us. strongly undulate

7. paniculata

Lvs thickly coriac., us. not > 2 cm. long, margins us. only slightly undulate to flat

8. coriacea

Capitula in axillary fascicles not confined to branch-tips

25. fragrantissima

Capitula in axillary corymbs aggregated towards branch-tips, or in panicles

Lvs distinctly toothed

Lvs entire

Lvs with soft cottony tomentum below

26. rani

Lvs with appressed satiny tomentum below

Lf-teeth rather distant, not at all spinose, margins flat

Lf-teeth rather close-set, very sharp to spinose, margins ± crisped

Lvs of orbicular to obovate or ovate order

14. arborescens

Lvs of lanceolate order

15. cheesemanii

Lvs of linear to linear-lanceolate or narrow-oblong order

22. ilicifolia

Lvs of ovate to ovate-oblong order

21. macrodonta

Lvs linear to narrow-oblong, lateral veins very prominent, almost ┴ stout midrib, giving undersurface a ± alveolate appearance

Lvs not at all as above

Lvs ± 5-10 cm. × 2-5 mm., undersurface hidden to midrib by revolute margins

24. crosby-smithiana

Lvs much larger, up to c. 30 × 3 cm., undersurface not hidden

23. lacunosa

Lvs, all or most, < 2 cm. long

Lvs, all or most, > 2.5 cm. long

Lvs submembr.; tomentum appressed, satiny; corymbs loose, with long slender pedicels

16. capillaris

Lvs coriac.; tomentum soft, dull; corymbs compact, with short pedicels

10. moschata

Infl. very broad, capitula c. 1·5 cm. long, phyll. 35 or more, in 4-5 series

20. pachyphylla

Infl. smaller, capitula much shorter, phyll. few, in fewer series

Capitula, all or most, with not > 6 florets

Capitula, all or most, with at least 10 florets

Tomentum closely appressed, satiny, ± lustrous

17. furfuracea

Tomentum less closely appressed, dullish

Lvs of elliptic-lanceolate order, margins flat

11. avicenniaefolia

Lvs of oblong to broad-elliptic order, margins undulate

12. albida

Lvs of rather narrowly lanceolate order

15. cheesemanii

Lvs not of above order

Lf-tomentum woolly or cobwebby, dull

Lf-tomentum satiny, ± lustrous

Lvs parallel-sided, tomentum yellowish white

19. townsonii

Lvs not parallel-sided, tomentum white or buff

26. rani

Lvs very coriac., breadth mostly > 1/2 length, entire

13. allomii

Lvs ± coriac., breadth rarely > 1/2 length, ± sinuate-dentate

Florets 5-12, achenes pubescent

17. furfuracea

Florets 12-20, achenes hairy

Lvs mostly < 8 cm. long, acute or acuminate

14. arborescens

Lvs mostly > 8 cm. long, obtuse to subacute

18. thomsonii

(Conserved against Shawia J. R. et G. Forst., 1776)

Olearia Moench

SYNOPSIS

Key

Volume contents

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