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| 1. The trees are armed. (have thorns or spines) |
Go to #2 |
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| + The trees are unarmed. (no thorns or spines) |
Go to #4 |
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| 2. Thorns on thorn, often extremely thorny, leaves once or twice compound. Fruit a wide, flat pod, dark brown when mature, 10-18" long. |
HONEY LOCUST |
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| + No thorns on thorns |
Go to #3 |
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| 3. The bark has corky outgrowths tipped with short thorns. Leaflets often have prickles |
HERCULES CLUB |
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| + Compound leaf branches into two parts; stout straight thorns up to 2" long. Fruit a rounded pod, 6-9” long |
HONEY MESQUITE |
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| 4. Leaves are twice-compound, leaflets coarsely toothed or lobed. Fruit a small round ball, green or yellow when mature |
CHINABERRY |
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| + Leaves are once-compound, margins smooth or toothed, but leaves are not lobed. |
Go to #5 |
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| 5. Leaflets are finely toothed. |
Go to #6 |
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| + Leaflets have smooth margins. |
Go to #7 |
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| 6. Largest leaflets near the middle of leaf, last leaflet often small or missing. 15-23 leaflets, bark is dark and cracked into rough diamonds when mature. |
BLACK WALNUT |
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| + Largest leaflet near the end of the leaf, and there is usually a terminal leaflet present; leaf has 11-17 curved leaflets. Bark is gray, very rough and craggy. |
PECAN |
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| 7. Leaflets are oval shaped, small. Fruit hanging in a "string of beads." |
EVE’S NECKLACE |
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| + Leaflets are lanceolate |
Go to #8 |
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| 8. Bark is light gray; leaflets 7-19, alternate on rachis, usually no terminal leaflet; mild smell when crushed. |
SOAPBERRY |
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| + Bark is cinnamon colored; usually has a terminal leaflet, except on very young trees; leaflets have strong, peppery scent when crushed. |
CHINESE PISTACHE
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