KEY FOR MARCH, APRIL AND MAY 



62 a Leaflets 3 Laburnum, 



b Leaflets 8-12 Caragana. p 173 



63 a Flowers violet-purple, about }4 in. long. . .Amorpha. p 173 

 b Flowers white, pink, or purple, Vz in. or more long. . 64 



64 a Trees or shrubs usually with short spines for stipules; 



racemes usually 8 in. or less long Robinia. p 173 



b Shrub not with spines for stipules; racemes often 10-25 



in. long Wistaria, p 173 



65 a Trees, shrubs, or trailing vines with prickles 66 



b Shrubs or trees not with prickles 68 



66 a Tree or large shrub 10 ft. or more high 



Xanthoxylum. p 179 

 b Shrubs 6 ft. or less high, erect or trailing 67 



67 a Shrubs cultivated for the flowers Rosa, p 166 



b Shrubs not cultivated for the flowers Rubus. p 164 



68 a Flowers white 69 



b Flowers not white 71 



69 a Leaflets 3 ; flowers fragrant Citrus trifoliata. p 179 



b Leaflets 5 or more 70 



70 a Leaves doubly compound ; flowers in racemes 



Gymnodadus. p 170 

 b Leaves singly compound ; flowers in cymes .... Sorbus. p 167 



71 a Leaves evergreen ; leaflets with spiny teeth 



Berberis japonica. p 154. 

 b Leaves not evergreen; leaflets not with spiny teeth 72 



72 a Leaflets 3 Rhus radicans. p 181 



b Leaflets 5 or more 73 



73 a Shrub 1-2 ft. high; flowers purplish-brown 



Xanthorrhiza. p 152 



b Shrubs or trees 5 ft. or more high 74 



74 a Flowers about Vz in. long, yellow Koelreuteria. p 183 



b Flowers -^4 in. or less long, greenish 75 



75 a Leaflets entire Juglans regia. p 14.1 



b Leaflets toothed 76 



76 a Leaflets 5-11; pith in the twigs not chambered 



Hicoria. p 14.1 

 b Leaflets 11-25; pith m the twigs chambered with cross 



partitions 77 



77 a Cultivated tree; pistillate flowers in racemes 



Pterocarya. p 142 

 b Native trees; pistillate flowers in clusters of 2-4 



Juglans. p 14.1 



