f. Leaves dark green and shining above. G. Stamens 10: under side of leaves glabrous or nearly so.

H. Anthers rose-color or purple.

I. fruit glabrous: corymbs glabrous.

J. Shape of Ivs. cuneate-obovate to oblanceolate: fruit

dull red; stones usually 2.......19. Crus-galli

JJ. Shape of Ivs. oblong to ovate: fruit crimson, lustrous; stones 8-5.20. Canbyi II. fruit villous until nearly fully grown: Ivs. oblong-obovate to b r o adly ovate: corymbs slightly villous...........21. fecunda

HH. Anthers yellow: Ivs. obovate: fruit dull dark crimson............22. Arduennae

GG. Stamens 20.

h. Under side of Ivs. villous: corymbs densely pubescent...........23. Carrierei hh. Under side of Ivs. glabrous: corymbs slightly pubescent.... 24. persistens FT- Leaves dull above: stamens 20. G. fruit juicy, edible: leaves cu-neate-oblong or elliptic-lanceolate, tomentose beneath ................25. mexicana

GG. fruit dry, mealy: leaves obovate or oval. H. Length of leaves 2-4 in., pubescent beneath: fruit ovoid, 1/2-l in. long, with large dots.......26. punctata

HH. Length of leaves l 1/2-2 2 in., at maturity hairy only on the midrib beneath: fruit globose, 1/3-1/2,in. across, with small dots......27. collina ee. Corymbs few-fid.: leaves 1/2-2 in. long, pubescent beneath: stamens 20-25.

F. Flowers with or before the leaves: fruit

ripening in May, juicy, bright red: leaves l 1/2-2 in. long................... 28. aestivalis

FF. Flowers after the leaves: fruit ripening very late, dry, dull red or yellow: leaves less than 1 1/2 in. long. G. Leaves obovate, mostly obtuse, crenately serrate: flowers usually solitary.....29. uniflora gg. Leaves oval or ovate, acute, serrate and often lobed: flowers 2-6...............30. Vailiae dd. The petioles, margin of leaves and corymbs densely glandular: corymbs 3-7-flowered E. Stamens 20, anthers purple: fruit

ovoid....................31. flava ee. Stamens 10.

f. fruit pyriform: anthers pur- plish..................31. flava var lobata.

ff. fruit globose: anthers yellow. .32. aprica bb. Stones with furrows or irregular cavities on the inner surfaces; fruit lustrous, soft at maturity. c. Leaves not or only slightly lobed.

D. Color of fruit scarlet or orange; stones

2-3: leaves with impressed veins.

E. fruit small, ovoid or pear-shaped, upright, orange-red: leaves thin, dull above, pubescent below.. .33. tomentosa ee. fruit subglobose, larger, nodding, scarlet: leaves subcoriaceous, pubescent only on the veins beneath.

F. Anthers rose-color; stamens usually 20.............34. succulenta

FF. Anthers yellow; stamens 10. G. Foliage glabrous below: stones deeply grooved on the inner surface.......35. macracantha

GG. Foliage usually pubescent on the veins below while young: stones slightly grooved...............36. prunifolia

DD. Color of fir. black; nutlets 5: leaves broadly elliptic to obovate, glabrous (see also No. 42 with blue fruits)...................37. Douglasii

CC. Leaves more or less distinctly lobed. D. Length of leaves more than 2 in.: leaves pubescent: fruit nearly 1/2in.

across......................38. sanguinea dd. Length of leaves less than 2 in.: leaves quite glabrous: fruit 1/3in. or less across.......................39. dahurica

AA. Veins of the leaves extending to the points of the lobes and to the sinuses; leaves usually distinctly lobed. b. fruit very small, 1/3in. long or less, red: calyx deciduous. c. Leaves triangular-ovate, with shallow and broad lobes, often 3-lobed: fruit subglobose, lustrous; nutlets 3-5...40. Phaenopyrum cc. Leaves ovate, deeply 5-7-lobed: fruit

ovoid; nutlets 1-3..............41. apiifolia bb. fruit larger: calyx-teeth persistent. c. Color of fruit black or blue.

d. The fruit blue, bloomy: leaves obovate to obovate-oblong, crenate-serrate, usually not lobed.........42. brachyacantha dd. The fruit black; stones with cavities on the inner surfaces. E. Leaves with about 5 pairs of lobes: fruit lustrous, subglobose, juicy.4\3, nigra ee. Leaves with 2-3 pairs of lobes: fruit ovoid, dull black or purplish black....................44. pentagyna

CO. Color of fruit red or yellow.

d. Stones with cavities on the inner surfaces, 1-2. e. Styles 2: leaves 3-5-lobed with short and broad serrulate lobes.....................45. Oxyacantha ee. Style 1: leaves deeply 3-7-lobed, with acute, entire or sparingly toothed lobes........46. monogyna

DD. Stones plain on the inner surfaces, 2-5. E. Branchlets and leaves pubescent. F. Leaves with glandular toothed lobes, pubescent..........47. tanacetifolia

FF. Leaves not glandular-toothed, lobes often nearly entire. G. Upper surface of leaves dull, pubescent, under surface villous...........48. orientalis

GG. Upper surface of leaves gla-brescent, lustrous, under surface finely pubescent.49. Azarolus EE. Branchlets glabrous: leaves deeply lobed, glabrous.............50. pinnatifida