MINNESOTA TREES AND SHRUBS 



Anacardiaceac 

 Rutaceae 



Rosacea* 



Simarubaceae 



Sapindaceae 

 Leguminosae 



Oleaceae 



Solanaceae 



Ericaceae 



Bignoniaceae 



Caprifoliaceae 

 Ericaceae 



Compositae 

 Kubiaceae 



Clematis in Ranunculaceae 

 Yilaceae 



s. Flowers greenish 

 (n) Leaflets usually more than 3 

 r. Thorny shrubs 

 s. Thornless shrubs or trees 

 (r) Flowers white 

 (s) Flowers greenish 

 (b) Flowers irregular 

 x. Stamens 7, separate 

 y. Stamens 10, 9 of them united 

 b. Petals united 



(1) Ovary superior 



(a) Flowers regular 

 x. Stamens 2 

 y. Stamens 4-10 



(x) Ovary 2-celled 

 (y) Ovary 4-10-celled 



(b) Flower irregular 



(2) Ovary inferior 



(a) Stamens 5 



(b) Stamens 8-10 

 2. Flowers in heads 



a. Stamens united, style 2-cleft 



b. Stamens separate, style not cleft 

 II. Petals absent 



1. Sepals present, rarely very minute 



a. Climbing vines 



(1) Stamens and pistils many, sepals large 



(2) Stamens 5, pistil 1, sepals minute (petals 



present but falling quickly) 



b. Shrubs or trees 



(1) Flowers in catkins, at least the staminate 



(a) Pistillate flowers in catkins, sap milky 



(b) Pistillate flowers solitary, sap not milky 



(2) No catkins present 



(a) Style 1 

 x. Stigma 1 or slightly 2-cleft 



(x) Trees with compound leaves 

 (y) Low shrubs with simple leaves 

 m. Leaves green, glabrous Thymelaeacea 



n. Leaves silvery or scurfy Elaeagnaceae 



y. Stigma with 6-9 radiate divisions Empetraceae 



(b) Styles or long sessile stigmas 2 



x. Leaves deeply cut or compound Aceraceae 



y. Leaves simple, not deeply cut Ulmaceae 



(c) Pistils 2-5, thorny shrub Rutaceae 



2. Sepals absent, or occasionally very minute 



a. Leaves scale-like or needle-like, usually evergreen 



(1) Leaves resinous, fragrant when bruised; fruit 



a cone or several-seeded blue berry Pinaceae 



(2) Leaves not resinous nor fragrant; fruit a one- 



seeded red berry Taxaceae 



b. Leaves not scale-like or needle-like, deciduous 



(1) Leaves simple 



(a) Leaves fan-shaped with forking veins Ginkgoaceae 



(b) Leaves from ovate to linear , net veined 



x. Fruit with many hairy seeds, flowers dioe- 

 cious Salicaceae 



y. Fruit one-seeded, flowers usually monoecious 



(x) Low shrubs with very fragrant leaves M yricaceae 

 (y) Trees, rarely shrubs ; leaves not fragrant Betulaceae 



(2) Leaves compound 



x. Leaves alternate, staminate flowers in catkins Juglandaccae 

 y. Leaves opposite, flowers in clusters Oleaceae 



Moraceae 

 Fagaceae 



Oleaceae 



in 



80 



US 

 83 



216 

 171 



107 



106 



84 



116 



277 

 84 



297 



275 



46 

 201 



77 

 256 



107 



207 

 209 

 105 



21 ( ) 

 73 

 80 



19 



41 



43 



53 



268 

 240 



232 

 107 



