KEY TO THE GENERA OF TREES 53 
C. Not asabove. (D.) 
D. Leaves once serrate; base rounded; fruit a drupe (as plum, 
Cherry!) tsnauwhigevy on cei gwsees eda as ees aaa. 36. Prunus. 
Leaves serrate to irregularly lobed; all of the unarmed northern 
forms which are not lobed have a decidedly wedge-shaped base or 
are hairy below ; fruit berry-like, ending in a persistent calyx. . 
schenseeeg saevitidy once eubaae ed ey eee see ed 38. Orateegus, 
E. Leaves with decidedly tonic taste, or petiole with one or more 
glands near the blade; never woolly below ; fruit a drupe..... 
oh cpSashasetiniecmPianee saan led TDA AAMAS Rane a DEA Empey 36. Prunus. 
E. Leaves woolly below ; fruit a pome. Apple and quince in.... 
Spa AehiiedeRee nae ee sy Laas nr MRET gs welee Me 37. Pyrus 
BE. Notas above. (F.) 
F. Leaves rounded to elliptical, shining above, abruptly acute at the 
Uipiy. “PEA Tanke adainas SG Pere Ee caendetlales 37, Pyrus. 
F. Leaves more often entire than serrate; rare north of Virginia. 
NOS 2 Mss \chaucisiadsiee Matsa eee lng ae gbess Seaeene 6 20. Rhaminus. 
F. Leaves deltoid, very acuminate. No. ]in........... 83. Betula- 
F. Leaves white beneath ; flowers 3-4 inches wide. No, 2 in....... 
i djantl Sra tub daemon eee MOTa ES ERE A SANGRE S E.OaeE 8. Gordonia. 
Leaves scurfy or with stellate hairs. .56. Styrax or 57. Pterostyraz. 
Leaves not included in the above. (G.) 
G. Leaves decidedly widest near the tip. (R.) 
G. Leaves not as above. (H.) 
H. Leaves smooth ; flowers white, rose, or greenish. (I.) 
H. Leaves pubescent below; some species smooth when mature ; 
flowers white. (J.) 
I. Glaucous Belen finely serrate ; flowers small, white........ 
eked ss Bett OER RENN Giga alOes inte k tacks Grate Bie te eth caters 53. Clethra. 
I. Leaves less finely serrate, one species sometimes 38-lobed ; 
flowers large, rose-color. Crab apples in.......... 387. Pyrus. 
I. Finely serrate ; flowers inconspicuous; berries red....18. Ilex. 
J. Flowers large, 4-lobed, drooping ; fruit 2-4 winged............ 
dota ian eh Ciahahedn Sas boa rite, BYR Wag ante A/G. os RiaB ease RNS LSe Rh kde SAL 58. Halesia. 
J. Flowers of 5 or more distinct petals ; petals broad; fruit few- 
seeded capsule...... 0... cece eee eet eer e neers 7. Stuartia. 
J. Flowers of 5 or more distinct petals; petals usually narrow and 
long ; fruit sweet, apple-like pome............ 39. Amelanchier. 
Usually thorny ; shrubs rather than trees ; fruit rounded berries 
ending in persistent calyx lobes..............4+ 38. Crategus. 
Not thorny; leaves deltoid, very acuminate; bark white in 
mature-trees: Nos 1 mes iv soy ese unasiensais aw atin ae 83. Betula. 
Not thorny ; leaf lobed ; end of leaf as though cut off......... 
Tie ehakeeibbas svae otond Auden 3.5 SNe eee ceseseneeees 2. Liriodendron. 
Not as above, (f.) page 56. 
rh 
ROK OR A 
