Black walnut tree
DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a photograph showing the timber form of Lawrence-1. 
     FIG. 2 is a photograph showing a twig with nuts attached from Lawrence-1. 
     FIG. 3 is a photograph showing leaves of Lawrence-1. 
    
    
     BACKGROUND OF THE INVENTION 
     After the original clone was selected, and assigned an identity number of BW49, the aforesaid tree was reproduced by collecting scions from it and grafting these onto common black walnut rootstocks at Martell Forest, Purdue University. These asexual reproductions ran true to the parent tree and to each other in all respects. 
     The botanical details of this new and distinct variety of walnut tree are as follows: 
     Tree: 
     Size.--Large. 
     Vigor.--Vigorous. 
     Growth rate.--Rapid growth, but slower than Purdue 1, 2, and 3-5% larger in diameter than the average of selected clones planted the same year, 8% taller than the average, and 16% more cubic foot volume than the average. 
     Form.--Excellent timber form nearly as good as Purdue 1 -- 34% straighter than average on a rating scale of 1 to 5. Few crooks. Strong central stem tendency. 
     Trunk: 
     Bark.--Dark brown to gray. 
     Texture.--Interlacing ridges. 
     Branches: 
     Diameter.--Average -- large. 
     Length.--Long. 
     Branch angle.--Lower branches -- average -- 60 deg. 
     Foliage.--Quantity -- Abundant. Density -- Heavy. 
     Leaves: 
     Compound leaves.--Size -- longer than average; average length -- 18&#34;. 
     Leaflets.--Size -- large; average length -- 41/4&#34;; average width -- 11/2&#34;; average number of leaflets -- 17; shape -- lanceolate; acutely pointed. Thickness -- thin; Texture -- smooth; Margin -- serrated; Petiole -- short; Color -- Topside -- dark green; Underside -- light green. 
     Anthracnose resistance.--Excellent, much better than average on a rating scale of 1 to 5. 
     Time of leafing.--About average. 
     Flowering habit: 
     Age at which tree starts producing catkins.--Very early. 
     Number of catkins produced.--Abundant. 
     Size of catkins.--Average. 
     Time of pollen shed.--Late. 
     Age at which time tree starts producing pistillate flowers.--Very early. 
     Number of pistillate flowers produced by young trees.--Abundant. 
     Number of pistillate flowers produced by mature trees.--Abundant. 
     Lateral shoots producing pistillate flowers.--Abundant some years. 
     Number of pistillate flowers per inflorescence.--2-3. 
     Timing of pistillate flower receptivity.--Early. 
     Coincidence of staminate and pistillate bloom.--Seldom. 
     Nut crop: 
     Bearing.--Annual to biennial. 
     Productivity.--Heavy. 
     Ripening period.--Mid-season. 
     Evenness of maturity (period between first and last nuts are ready for harvest).--Even. 
     Quality.--Very good. 
     Distribution of nuts on tree.--Throughout. 
     Hull: 
     Outer surface.--Smooth -- a few warts. 
     Form.--Nearly rounded both ends. 
     Thickness.--Thick. 
     Size.--Large; average length -- 2 5/16&#34;; average diameter in suture plane -- 2&#34;; average diameter cheek to cheek -- 2 7/32&#34;. 
     Nut: 
     Size.--Medium; average length -- 13/8&#34;; average diameter in suture plane -- 11/8&#34;; average diameter cheek to cheek -- 11/2&#34;. 
     Uniformity of size.--Some variability. 
     Form.--Round -- flattened in suture plane. 
     Blossom end.--Rounded. 
     Basal end.--Rounded. 
     Weight.--Dry weight of ten nuts -- 159.6 gm; dry weight of ten kernels -- 32.2 gm; average percentage kernels to nut -- 20.2%. 
     Thickness of shell.--Thin. 
     Fill.--Good. 
     Kernel: 
     Size.--Large. 
     Plumpness.--Plump. 
     Shrivel.--None. 
     Flavor.--Good. 
     Color.--Light. 
     The walnut tree and its nuts herein described may vary in slight detail due to climatic and soil conditions under which the variety may be grown; the present description being of the variety as grown near West Lafayette, Ind.