574 
LI. MYRTACEiE. 
Stamens united in 5 bundles opposite the petals (almost free in one species 
of Melaleuca ). Staminal bundles distinct or scarcely united at the base. 
Ovules several in each cell 13. Melaleuca. 
Subtribe III. Eucalypteae . — Leaves opposite or alternate, coriaceous, usually large. 
Flowers usually 3 or more in umbels, sometimes reduced to heads, or very rarely in cymes or 
solitary ; the common peduncle axillary or in a terminal corymb or panicle. Calyx truncate, 
entire or remotely toothed. Petals attached by a broad base, distinct or consolidated into an 
operculum. Stamens indefinite, in several series, free or obscurely united into 4 bundles ; anthers 
various. Ovules indefinite in each cell. Embryo with the cotyledons longer than the radicle and 
often folded over it. 
Stamens numerous, free or obscurely united at the base. Petals attached by 
a broad base, free or consolidated into an operculum. Leaves usually 
large. Flowers in umbels, heads, or cymes, rarely sessile on the stem. 
Calyx-teeth distinct, distant. Petals free 14. Anoophoka. 
Calyx truncate, entire or with 4 minute teeth. Petals united in an oper- 
culum 15. Eucalyptus. 
Subtribe IV. IVIetrosidei’ese. -J. eaves opposite or rarely alternate, Myrtle-like or large, 
penniveined. Flowers usually in little cymes, corymbs, or short racemes, axillary or in terminal 
panicles, rarely solitary in the axils and then pedicellate. Stamens numerous, free or rarely 
united in bundles opposite the petals ; anthers versatile, the cells parallel, opening longitudinally. 
Ovules few or many in each cell of the ovary, in 2 or more rows. Embryo straight or slightly 
curved, the cotyledons longer than the radicle. 
(This subtribe has nearly the flowers and embryo of Euleptospermew, but a different in- 
florescence, and a habit approaching that of Myrtece.—Benth.) 
Stamens exceeding the petals, indefinite, free, or rarely united in bundles 
opposite the petals. Leaves large or myrtle-like, penniveined. Flowers 
in pedunculate heads, cymes or corymbs, or rarely solitary and pedi- 
cellate. 
(Stamens scarcely exceeding the petals in some species of Tristania.) 
Stamens united in 5 bundles. Leaves alternate or in one species opposite 16. Tristania. 
Outer stamens with reniform sterile anthers. Leaves opposite, narrow . 18. Lysicarpus. 
Flowers in globular pedunculate heads. Leaves opposite. Stamens of 
Metrosideros 17. Syncarpia. 
Flowers in cymes. Stamens free, all perfect. 
Ovules numerous, horizontal or ascending, covering the placenta. 
Leaves opposite 19. Metrosideros. 
Ovules in a ring round a club-shaped or peltate placenta. Leaves 
alternate 20. Xanthostemon. 
Ovules pendulous or recurved. Calyx-lobes almost petal-like. Leaves 
opposite 21. Backhousia. 
Stamens indefinite, free. Fruit dry, indehiscent. Ovary perfectly or imper- 
fectly 2-celled or 1-celled by abortion. 
Calyx-lobes almost petal-like. Petals 4, shorter than or scarcely exceeding 
the calyx-lobes. Flowers in cymes, heads or umbels 21. Backhousia. 
Calyx-lobes 8. Petals none. Flowers solitary, sessile 22. Osbornia. 
Calyx-lobes 5, narrow. Petals 5. Flowers solitary, pedicellate .... 27. Fenzlia. 
Tribe III. Myrte.£. — Ovary divided into 2 or more cells, or very rarely 
1-celled, with 2 parietal placentas. Fruit an indehiscent berry or drupe. 
Limb of calyx closed in bud, with the lobes subimbricate, rather deeply 
valvately divided when in flower 23. ‘Psidium. 
Ovary 1-celled, with 2 parietal placentas. Leaves 3-nerved 26. Rhodamnia. 
Ovary 2-celled (or 1-celled by abortion), with 2 or 3 superposed ovules in 
each cell. Leaves white underneath 27. Fenzlia. 
Ovary with 2, 4, or 6 rows of superposed ovules, separated by vertical septa, 
the ovules themselves separated by transverse septa (1, 2, or 3-celled, with 
double rows of ovules in each cell, all separated by spurious septa). 
Leaves sometimes 3-nerved 24. Rhodomyrtus. 
Ovary 2 or 3-celled, with several ovules in each cell, without spurious 
dissepiments. 
Embryo long and narrow, curved, circular, or spiral, with small cotyledons. 
Flowers 5-merous or rarely 4-merous, solitary or racemose 25. Myrtus. 
Embryo thick and fleshy, either indivisible or with 2 thick fleshy 
cotyledons and a short radicle. Flowers 4-merous or rarely 5-merous, 
solitary or in trichotomous cymes or panicles 29. Eugenia. 
Ovary 5 or rarely 4-celled, with 2 to 6 ovules in each cell. Embryo of Myrtus 28. Decabpermum. 
(One species of Kunzea has the fruit succulent and pulpy.) 
