I 



Key to the Wild Plants and Cultivated Trees 



and Shrubs Which Flower During 



March, April and May 



1 a Trees, shrubs, and woody vines 2 



b Herbaceous plants 162 



2 a Leaves about Vs in. or less broad, present at flowering 



time 3 



b Leaves % in. or more broad or wanting at flowering 



time 21 



3 a Leaves scale-like, more or less appressed to the stem, the 



tips sometimes spreading 4 



b Leaves awl-shaped, linear, or needle-like, not appressed 



to the stem 9 



4 a Low shrubs usually 2 ft. or less high 5 



b Shrubs or trees 3 ft. or more high 6 



5 a Cultivated shrub; leaves in 4 rows on the stem 



Calluna. p 195 

 b Native shrubs; leaves not in 4 rows on the stem 



Hudsonia. p 186 



6 a Flowers white or pink with sepals and petals; branches 



often plume-like Tamarix. p 186 



b Flowers in small aments, without sepals or petals .... 7 



7 a Branchlets appear more or less 4-sided, not flattened 



laterally; all leaves more or less keeled 



Juniperus virginiana. p 109 

 b Branchlets appear much flattened laterally, 2 rows of 



leaves flat and 2 rows keeled 8 



8 a Branchlets about % in. broad Thuja, p 109 



b Branchlets about M.6 in. broad, or the tips of leaves 



spreading Chamaecy Paris, p 109 



9 a Leaves in clusters on the stem 10 



b Leaves attached singly to the stem 12 



10 a Leaves 2-5 in a cluster Pinus. p 107 



b Leaves 10 or more in a cluster n 



11 a Leaves deciduous, borne on short bud-like branches 



Larix. p 108 

 b Leaves evergreen, not borne on short bud-like branches 



Cedrus. p 108 



3 



