22 



SHRUBS. 



44. Leaves with terminal leaflet. Robinia. 

 Leaves without terminal leaflet. 45. 



45. Leaflets blunt or notched. Caragana. 

 Leaflets acute. Halimodendron. 



46. Leaves appearing simple, often clustered on short spurs 



-bove a I- or 3-pronged spine. Berberis. 



Leaves distinctly compound, with pungent axis. 47. 



47. Leaflets acute or bristle-tipped. Halimodendron. 

 Leaflets blunt or notched. Caragana. 



48. Scurfy with silvery or brown scales. 49. 

 Not scurfy. 50. 



49. Leaves narrow, nearly linear. Hippophae. 

 Leaves lanceolate or elliptical. Elaeagnus. 



50. Sap milky. 51. 

 Sap not milky. 52. 



51. Leaves narrow (under 25 mm.) : fruit small. Bumelia. 

 Leaves broader : fruit like a gigantic mulberry. Maclura. 



52. With nectar-glands on petiole or leaf-base. Primus. 

 Without nectar-glands. 53. 



53. Twigs distinctly angled. 54. 

 Twigs rounded : fruit a pome. 56. 



54. Leaves as well as twigs pungent. Ulex. 

 Leaves not pungent. 55. 



55. Leaves minute (under I cm.) : twigs green. Cytisus. 

 Leaves larger : twigs whitish. Lycium. 



56. Core of fruit papery : fruit large : bud-scales thin. 57. 



Core bony : fruit small : buds with fleshy scales. Crataegus. 



57. Glabrous. Chaenomeles. 

 More or less woolly. Pyrus. 



Leaves opposite. 



58. Scurfy with silvery or brown scales. Shepherdia. 

 Not scurfy. 59. 



59. Spines short, between the uppermost buds. Rhamnus. 

 Spines spur-like. 60. 



60. Leaves rounded at base. Viburnum. 

 Leaves acute at both ends. Forestiera. 



