A. Flowers mostly in panicles or corymbs, not simple umbels (occasionally the infloresence appears to be paniculate in section aaa also, owing to dropping of leaves, so that it is well to look for leaf - scars in doubtful cases). B. fruit 1 1/2-2 in. long; valves inclosed: flowers large. c. Seeds black, not winged: flowers white or pink...................... 1. calophylla cc. (Seeds brown or red, winged: flowers red

(pink to crimson or scarlet)...... 2. ficifolia bb. fruit 1/2i-1 in. long (1/4-1/2in. in E. maculata); valves inclosed: flowers medium. c. Leaves paler beneath: flowers in terminal corymbs...................... 3. corymbosa

CC. Leaves of nearly equal color on both sides: flowers in lateral and terminal panicles. d. Caps, slightly ribbed: flowers nearly or quite sessile in the clusters... 4. eximia dd. Caps, smooth: flowers distinctly stalked..................... 5. maculata bbb. fruit 1/4in. or less long (nearly 1/2in. in variety of No. 16); valves various: flowers small. c. Shape of leaves orbicular to ovate, often nearly as broad as long. D. Petioles slender; leaves alternate. e. Flowers stalked: leaves dull grayish green.................... 6. polyanthemos

EE. Flowers nearly sessile: leaves lustrous and dark green....... 7. populifolia dd. Petioles none; leaves opposite..... 8. melanophloia cc. Shape of leaves lanceolate or oblong, elongated. d. Leaves distinctly paler beneath than above. e. fruit - valves included in the calyx-tube................10. paniculata ee. fruit - valves exserted...........11. Raveretiana dd. Leaves of equal color on both sides. e. Lid 1/4in. or more long, beaklike ...................... 9. siderophloia ee. Lid shorter, not beak-like.

F. fruit - valves much exserted, spreading..............12. microtheca ff. fruit - valves about reaching the rim: If. - veins very diverging ....................13. crebra

14.leptophleba fff. fruit - valves wholly included in calyx-tube: If. - veins very oblique.

g. Lid hemispheric.........15. bicolor gg. Lid conic..............16. hemiphloia

AA. Flowers solitary in the If. - axils, or in strictly sessile umbels, large. b. Leaves all opposite, cordate at base: shrub. 17. macrocarpa bb. Leaves mostly alternate, not cordate. c. Peduncles ascending, or flowers entirely sessile; lid warty.

d. Plant a tree: leaves acute.........18. globulus dd. Plant a shrub: leaves obtuse, very oblique at base..............19. alpina cc. Peduncles recurved, flat; lid smooth: shrub........................20. tetraptera aaa. Flowers in stalked umbels.

b. flower-stalks (either pedicels or peduncles) flattened. c. fruit - valves with teeth projecting well beyond calyx-rim. d. Teeth connivent into a cone: lid 1-1 1/2 in. long. e. fruit not embedded in receptacle. 24. cornuta ee. fruit partly embedded in receptacle......................25. Lehmannii dd. Teeth distinct: lid 3/4in. or less long. E. fruit 1/2-3/4in. long: lid about 1/2in. long. F. The flowers sessile in the umbels: leaves obtuse..............26. platypus

FF. The flowers pedicellate: leaves

acute..................27. occidentalis

EE. fruit smaller: lid shorter.

F. The flowers more than 3 in each umbel. G. Lid much longer than calyx-tube............43. resinifera

GG. Lid about as long as calyx-tube............41. punctata

42. saligna GGG. Lid much shorter than calyx-tube: flowers sessile.....33. Cambagei

FF. The flowers usually 3 in each umbel..................52. viminalis

CC fruit - valves included or scarcely exserted beyond the calyx-rim (exserted but closely incurved in E. megacarpa and E. gompho-cephala). D. Breadth of fruit less than 1/2in. e. Lid less than half as long as calyx-tube, depressed-hemispheric, blunt. F. Leaves mostly 2-4 in. long: lid very short. G. fruit 3-6 lines diam.: lid granular.............28. coccif era

29. virgata

GG. fruit about 2 lines diam___40. microcorys

FF. Leaves mostly 4-8 in. long. G. Veins very oblique; leaves mostly under 1 in. wide. H. Calyx not angular; outer stamens sterile.30. haemastoma 31. Sieberiana HH. Calyx very angular in bud; stamens all perfect............... .32. goniocalyx

GG. Veins at nearly a right-angle to midrib; leaves thick, more than 1 in. wide.................34. botryoides

EE. Lid at least half as long as calyx-tube, mostly conic and acute.

F. Leaves ovate-lanceolate, I1/2-3 in. wide; lateral veins widely spreading........35. robusta

FF. Leaves lanceolate, 1/2-1 1/2in..

wide; lateral veins oblique.

G. The flowers short-stalked.

H. Arrangement of leaves

opposite: umbels bent downward..........70. doratoxylon

HH. Arrangement of leaves alternate. 1. The lid narrowly conic, twice as long as calyx............36. redunca

11. The lid broader, not so long.............37. pilularis

38. Muelleriana

39. acmenioides 41. punctata gg. The flowers sessile in the umbel: leaves paler beneath.42. saligna dd. Breadth of fruit over 1/2in.

E. Lid not or scarcely broader than calyx-tube.

F. Leaves roundish, obtuse.......26. platypus

FF. Leaves lanceolate, acute.

G. Calyx-tube and lid very warty................ 18. globulus gg. Calyx-tube and lid ridged or nearly smooth. H. Caps, sunk in the calyx-tube .....46. incrassata

47. Planchoniana 21. cosmophylla hh. Caps, protruding from calyx-tube..........48. megacarpa ee. Lid much broader than calyx-tube.....................49. gomphocephala bb. flower-stalks cylindric or angular but not flattened. c. Caps, sessile or nearly so in the umbels. D. fruit - valves with conspicuous projecting teeth. E. Lid 1-1 1/2 in. long, cylindric....24. cornuta ee. Lid mostly 1/4-1/2.in., conic.

f. The fruit - valves merely acute.. ..50. rudis ff. The fruit - valves ending in needle-like points........51. decipiens eee. Lid short, rarely 1/4in. long. F. Buds ovoid, smooth.

G. fruit mostly 4-celled: flowers

usually 3... .........52. viminalis

GG. fruit mostly 3-celled: flowers

usually more than 3... .53. Stuartiana 54. Macarthuri FF. Buds club-shaped, slender, often rough.............55. amygdalina

DD. fruit - valves included, or barely exceeding the rim. B. The flowers 4 or more.

F. Leaves of equal color on both sides. G. Venation of leaves feathered.

H. fruit3/4-lin. wide: shrub.6l. buprestium BH. fruit 1/4-1/2in. wide: trees. I. Buds club-shaped (i.e. widest above the middle), obtuse.............55. amygdalina

56. Risdonii

57. obliqua II. Buds ovoid, acute: fruit

contracted at orifice.44. piperita

45. eugenioides GG. Venation of leaves longitudinal and almost parallel.................58. stellulata

59. coriacea FF. Leaves paler beneath.

G. Lid broader than calyx: fruit streaked lengthwise... 60. corynocalyx GG. Lid not broader than calyx: fruit not streaked... 62. diversicolor EE. The flowers 1-3 in each umbel. F. Leaves opposite, heart-shaped at base. G. Calyx obtuse at base: leaves

crenate...............22. cordata

GG. Calyx tapering at base: leaves entire.............23. pulverulenta

FF. Leaves scattered, narrowed at base. G. fruit scarcely contracted at orifice................ .21. cosmophylla

GG. fruit much contracted at orifice................61. buprestium cc. Caps, plainly stalked in the umbels. D. Umbels with more than 3 flowers e. fruit - valves plainly exserted. F. fruit fiat-topped; valves awl-shaped.................63. salmonophloia

FF. fruit rounded to the valves; valves triangular, acute.

a. Diam. of fruit 2-3 lines.............64. rostrata

65. tereticornis GG. Diam. of fruit 4-6 lines.

h. Anthers reniform......66. macrorhyncha hh. Anthers oblong........50. rudis

EE. fruit - valves included.

F. fruit scarcely or not at all contracted at orifice. G. Leaves thick, odorless: fruit

1/4in. across...........67. Gunnii

GG. Leaves thin: fruit slightly smaller...............68. melliodora

69. odorata ff. fruit contracted at orifice.

a. Leaves opposite...........70. doratoxylon gg. Leaves mostly alternate. h. Breadth of fruit about 1/2in.

I. Lid as long as calyx-tube: If. - veins diverging...........71. marginata

11. Lid shorter than tube: veins oblique......72. Baileyana

HH. Breadth of fruit about

1/4in...............44. piperita

45. eugenioides DD. Umbels only 2- or 8-flowered, rarely 4- or 5-fid. (Ironbarks.) E. Peduncles becoming deflexed: fruit pendent...............73. erythronema ee. Peduncles not deflexed.

f. Bark smooth, light-colored . . 74. leucoxylon ff. Bark rough, persistent.

G. leaf - veins very oblique: bark red..............75. sideroxylon gg. leaf - veins widely spreading: bark grayish......76. longifolia