Umbelliferae
Alternative names: Not Applicable
Description:
Annual, biennial or perennial herbs and shrubs; stems and branches often with hollow internodes; leaves spiral; lamina often large and deeply dissected or compound; petiole often broadened and sheathing at the base, rarely (Hydrocotyle and Neosciadium) with stipules.
Inflorescence usually a compound, rarely a simple, umbel, head or short spike (very rarely reduced to a solitary flower); umbels often with bracts (involucre) and umbellules with bracteoles (involucel) at their bases; flowers epigynous, 5-merous, bisexual or unisexual; plants rarely dioecious; sepals usually small or absent; petals valvate or slightly imbricate, often 3-lobed with the terminal lobe inflexed, regular or outer petals, especially of the outer flowers in the umbel, sometimes larger than the inner, usually white, pink or yellow, sometimes greenish; stamens 5, alternate with petals; anthers introrse; carpels 2 (rarely 1) usually joined to form a 2-celled inferior ovary; styles 2 (rarely 1), free, initially bent inwards, swollen at the base to a fleshy epigynous usually 2-lobed nectariferous disk (stylopodium) at the base of which the perianth and stamens are inserted; ovules pendent, 1 in each cell.
Fruit dry, usually separating at maturity from the central axis (carpophore) into 2 nut-like 1-seeded indehiscent mericarps; pericarp membranous or exocarp variously indurated; endocarp sometimes woody (subfamily Hydrocotyloideae); mericarps joined by a narrow or wide commissure, often flattened laterally (compressed at a right angle to the commissural face) or dorsally (compressed parallel to the comissural face), each with 5 longitudinal ribs (costae) over the vascular bundles and longitudinal furrows (valleculae) between them or sometimes 4 secondary ridges alternating with the primary; the primary ribs on the dorsal face are termed 1 dorsal and 2 intermediate fibs; the 2 marginal fibs at the commissure are termed lateral or commissural ribs; resin-tubes (vittae) are often present between the primary ribs and on the commissural face (visible only in transection of the mericarps); seeds with endosperm; embryo minute.
Distribution:
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A cosmopolitan family with more than 250 genera and 3,000 species; most abundant in temperate regions. In Australia 42 genera and about 200 species of which 26 are introduced; 17 genera are represented only by introduced species, 4 have both native and introduced species; 10 genera are endemic to Australia. (V. H. Heywood (ed.) (1971), The biology and chemistry of the Umbelliferae, Bot:J. Linn. Soc. 64, Suppl. 1, with comprehensive bibliographies in the individual contributions.)
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Biology:
No text
Uses:
Many Umbelliferae are economically useful and cultivated, e.g., as vegetables: Daucus carota (carrot), Pastinaca satira (parsnip), Apium graveolens (celery), fine herbs: Anethum graveolens (dill), Anthriscus cerefolium (garden chervil), Foeniculum vulgare (fennel), Levisticum officinale (lovage), Petroselinum crispum (parsley), or spices: Carum carvi (caraway), Coriandrum sativum (coriander), Cuminum cyminum (cumin), Pimpinella anisum (anise). Most Umbelliferae, however, are poisonous, some very poisonous, e.g., Conium maculatum (hemlock).
Key to Genera:
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1. Leaf lobes and involucral bracts spinose-dentate; plants resembling a thistle; flowers in many-flowered heads |
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ERYNGIUM 10. |
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1. Leaves and involucral bracts without spines; plants not thistle-like; flowers in simple or compound umbels, rarely small in heads or spikes |
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2. Leaves simple, terete, hollow, transversely septate |
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LILAEOPSIS 14. |
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2. Leaves simple or compound, fiat or flliform, firm, without transverse septa |
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3. Stipules at the base of the petiole present; leaves simple or palmately compound with 3-5 leaflets |
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4. Leaf blades simple, cuneate at the base, gradually broadened from the petiole, longer than broad; mericarps with glochidia; annual |
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NEOSCIADIUM 15. |
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4. Leaf blades peltate, or (at least the lower ones) cordate or truncate at the base, or palmately divided into 3-5 leaflets, abruptly set off from the petiole, usually as broad as or broader than long; mericarp-surface smooth or sculptured, not with glochidia; annual or creeping perennial |
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HYDROCOTYLE 13. |
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3. Stipules absent; petioles sometimes broadened at the base with a distinct leaf sheath; leaves simple or variously compound |
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5. Leaves simple and more or less entire |
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6. Leaf blades roundish, cordate at the base, distinctly petiolate; flowers solitary or in few-flowered simple umbels; creeping perennial |
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CENTELLA 6. |
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6. Leaf blades linear to narrow-lanceolate, gradually narrowed at the base, indistinctly petiolate; flowers in compound umbels; plant not creeping |
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7. Petals yellow; leaves narrow- to linear-lanceolate, stem-clasping, distinctly parallel-veined; umbel surrounded by large involucral bracts; annual |
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BUPLEURUM 5. |
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7. Petals creamy- or greenish-white; leaves narrow-linear (the lower sometimes 3-fid), practically sessile, not stem-clasping, without distinct veins; involucre of small subulate bracts; perennial |
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PLATYSACE 20. |
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5. Leaves deeply dissected or compound |
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8. Fruit with a sterile beak 2-7 cm long |
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SCANDIX 21. |
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8. Fruit without or with a very short beak |
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9. Flowers in a simple umbel |
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10. Fruit with 2 horizontally spreading vertical lanceolate appendages 3-5 mm long at the apex |
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ULDINIA 25. |
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10. Fruit without apical appendages |
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OREOMYRRHIS 17. |
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11. Leaves ternately or palmately dissected or 3-partite |
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12. Sepals prominent; mericarps 7-9-ribbed; leaves subsessile or very shortly petiolate; involucral bracts lanceolate to ovate or obovate, as long as or longer than the pedicels with flowers |
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XANTHOSIA 26. |
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12. Sepals minute; mericarps not or indistinctly 5-ribbed; leaves with long petioles; involucral bracts narrow-linear, shorter than the pedicels |
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TRACHYMENE 24. |
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9. Flowers in compound umbels, sometimes sessile and with unequal rays (in Torilis contracted and appearing capitate) |
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13. Leaves 1-pinnate, at least the lower ones with broad leaflets |
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14. Petals yellow; basal leaves with 5 -11 irregularly lobed crenate-dentate leaflets; fruits strongly compressed and winged |
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PASTINACA 18. |
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15. Outer flowers with 1 petal much larger (4-6 mm long) than the others, deeply cleft into 2 equal lobes; fruit wings with a thickened corrugated margin |
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TORDYLIUM 22. |
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15. All flowers with about equal and undivided petals; fruit wings without a thickened corrugated margin |
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16. Leaflets of basal leaves 15-19, oblong-lanceolate to oblique-ovate, more or less regularly serrate; involucre and involucel conspicuous |
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BERULA 3. |
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16. Leaflets of basal leaves 3-5, ovate-cuneate, usually 3-lobed and toothed; involucre and involucel absent |
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APIUM 2. |
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13. Leaves variously ternately or pinnately partite and dissected (if 1-pinnate leaflets deeply lobed or cut) |
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17. Fruit with bristles or spines |
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18. Umbels more or less densely globular, leaf- opposed, subsessile or on short peduncles, rays and pedicels very short |
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TORILIS 23. |
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18. Umbels expanded, terminal, pedunculate or, if sessile, sometimes leaf-opposed; rays and pedicels long, sometimes unequal |
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DAUCUS 9. |
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17. Fruit without bristles, smooth, ribbed and/or tuberculate |
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19. Umbels along the stem, leaf-opposed |
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20. Umbels pedunculate; involucre and involucel present; sepals conspicuous; ultimate leaf segments linear-cuneate; perennial |
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XANTHOSIA 26. |
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20. Umbels mostly sessile; involucre and involucel absent; sepals obsolete; ultimate leaf segments filiform; annual |
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CICLOSPERMUM 7. |
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19. Umbels terminal, pedunculate |
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21. Petals yellow or greenish-yellow |
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22. Ultimate leaf segments cuneate, often crisped; plant 30-75 cm high; involucre of 1-3 bracts; involucel of 5-8 bracteoles; fruit c. 3 mm long, without wings |
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PETROSELINUM 19. |
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22. Ultimate leaf segments linear to filiform; plant 60-250 cm high; involucral bracts usually absent |
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23. Fruit scarcely compressed, without wings, ovoid-oblong, 4-10 mm long; involucel absent |
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FOENICULUM 12. |
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23. Fruit strongly compressed, with thin lateral wings closely appressed to each other, elliptical to oblong-elliptical, 12-15 mm long; involucel of a few linear-lanceolate deciduous bracteoles |
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FERULA 11. |
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24. Stem with purple blotches; leaves 2-4- pinnate |
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CONIUM 8. |
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24. Stem without purple blotches |
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25. Fruit of 2 almost globular mericarps, rugose, without distinct ribs; styles very short |
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BIFORA 4. |
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25. Fruit longer than broad; mericarps smooth except for the longitudinal ribs; styles long |
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26. All involucral bracts entire or absent; styles erect in fruit; carpophore absent |
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OENANTHE 16. |
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26. At least some involucral bracts 3-fid or pinnatisect; styles reflexed in fruit; carpophore 2-fid |
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AMMI 1. |
Author:
Prepared by Hj. Eichler
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