The Thorn Trees 



445 



i 



veined and dull above; fruit red or yellow 

 flesh thick. 

 Nutlets 3 or 4; leaves narrow. 



Nutlets usually 3; nest of nutlets longer than 

 thick; leaves smooth, bright dark yellow- 

 green above. 

 Nutlets 3 or 4; nest of nutlets of about equal 

 length and thickness; leaves hair)', dull gray- 

 green above. 

 Nutlets 5; nest of nutlets shorter than thick; 

 leaves wide, 

 dd Leaves short -obovate to spatulate; leaf-stalks, leaves 

 and corymbs conspicuously glandular; corymbs 

 few-flowered; nutlets usually 3 or 4; fruit green, 

 orange or red, subglobose or oblong, hard; 

 leaves thin; twigs conspicuously zigzag. 

 Corymbs smooth; nest of nutlets shorter than 



thick. 

 Corymbs hairy. 

 Fruit smooth. 



Fruit yellow-green; nest of nutlets shorter than 



thick; leaves obovate. 

 Fruit red; nest of nutlets of about equal length 

 and thickness; leaves spatulate. 

 Fruit, twigs, and leaves hairy; nest of nutlets of 

 about equal length and thickness. 

 cc Leaves broadest at the middle. 



Fruit smooth; nutlets 3 to 5; fruit red, subglobose 

 to oblong; flesh thin; corj-mbs smooth, many- 

 flowered; leaves 3-lobed, smooth, bright dark 

 green above. 

 Fruit bright red, 5 to 7 mm. thick. 

 Fruit dull brick red, 6 to 9 mm. thick. 

 Fruit hairy. 



Nutlets 3 to 5; nest of nutlets shorter than thick; 

 corjTnbs hair}', many-flowered; leaves thick, 

 hairy above when mature, orbicular-ovate; flesh 

 thick; fruit globose, orange-red. 

 Nutlets 5, the nest of about equal length and 

 thickness; leaves thin, smooth above when ma- 

 ture, oblong to oval; fruit oblong to globose, 

 orange-red; flesh thin; cor^-mbs many-flowered. 

 ccc Leaves broadest toward the base. 



Nutlets usually 3 or 4; sinus between nutlets shallow; 



nest of nutlets shorter than thick; fruit greenish or 



reddish yellow, nearly globular, angular; flesh thick, 



hard; corymbs few-flowered; leaves half-leather}', 



yellow-green. 



Nutlets usually 3 to 5; sinus between nutlets deep; 



nest of nutlets shorter than thick; fruit depressed 



globose to short oblong, angled, wa.xy; flesh 



7. C pausiaca. 



8. C. punctata. 



9. C. siiborbiculata. 



10. C. lacrimata. 



11. C flava. 



12. C. recurva. 



13. C. dispar. 



14. C. viridis. 



15. C. nitida. 



16. C. Harhisoni. 



17. C Berlandieri. 



18. C. Bovntoni. 



