Keys Leaves Alternate 



xxxni 



336. 

 337. 

 338. 



p. 111. Crataegus. 



Buds with red fleshy scales. 



Bud-scales not fleshy. 337. 



Buds woolly or gummy: no catkins. 



Buds not woolly or gummy. 



Stipule-scars rather elongated. 340. 



Stipule-bases present, or their scars short. 339. 



Stipule-scars or bases on a leaf-cushion, p. 127 



Stipule-scars not on a leaf-cushion. 341. 



Pith round: buds often superposed. p. 92. Neillia. 



p. 106. Sorbus. 

 p. 14. Leitneria. 



Prunus. 



142. 



p. 23. Betula. 

 p. 242. Stachyurus. 



p. 150. Amorpha. 



Pith 3-sided: buds not superposed. 



Leaf-scars somewhat raised. 



Leaf-scars low. 342. 



Buds nearly globose. 



Buds ovoid. 343. 



Bundle-traces confluent or twigs hairy. p. 220. Rhamnus. 



Bundle-traces separate or twigs glabrous, p. 127. Prunus. 



Stipule-scars nearly or quite encircling the twig. 345. 



Stipule-scars not nearly encircling the twig. 349. 



Buds pointed and spike-like. 



Buds not sharp and hard. 346. 



Sap milky. 



Sap not milky. 347. 



Very rusty-hairy. 



Without long rusty hairs. 348. 



Buds terete. 



Buds flattened. 



p. 27. Fagus. 



p. 37. Ficus. 



p. 64. Michelia. 



p. 63. Magnolia, 

 p. 62. Liriodendron. 



350. 

 351. 



Leaf-scar nearly encircling the twig after the 



petiole has fallen. p. 121. Purshia. 



Leaf-scar not at all nearly encircling the twig. 350. 



Bundle-traces 3: pith chambered. p. 19. Pterocarya. 



Without this combination of characters. 351. 



Bundle-traces many, mostly in 3 groups: leaf-scars 

 lobed. 352. 



Without this combination of characters. 358. 



