Fruit fleshy. PAGE 
Fruit with one seed, stone cylindrical...... Nyssa IN 
CORNACE EE See a. 244 
Fruit with more than one seed, rarely one, 
FST SeG IS}. FEW Gs Cain see aR teh eat rh eae BIBENACE epee een ae 250 
B. Leaves finely serrate, coarsely toothed or lobed. 
C. Leaves with one primary vein. 
Beankeandsleavestaromatl cae semrerr erica ce IGNORING. He 6 ea ole ne 159 
Bark and leaves not aromatic. 
Staminate and pistillate flowers and fruit in cat- 
kins. 
Seales of winter buds 2, ovary many-seeded, 
seeds with a tuft of hairs at the summit...SaLix In SaLicacEm... 36 
Seales of winter buds more than 2, ovary 1- 
Staminate and pistillate flowers and fruit not in 
catkins. 
Fruit dry. 
IBWUITiie ay SUN ATA ese rae oe ee oe ers in ULMus IN ULMACE@... 135 
JPiCis, WOW EVSEMORN Io uapeosbonomos shea Seek eke IWNGNOW so nb ov.cooe Sec 91 
Fruit fleshy. 
Flowers more than 8 mm. (1/3 inch) broad, 
fruit edible, apple-like. 
Trees mostly with thorns, fruit with rem- 
nant of calyx at apex of fruit, norm- 
ally with more than 1seed............ IMA TIA CHAD eee). Saareiaiiee 167 
Trees without thorns, fruit with no rem- 
nant of calyx at the apex, fruit a 1- 
seeded edible drupe.................. AMYGDALACES......... 203 
Flowers less than 8 mm. (1/3 inch) across, 
fruit a non-edible drupe. 
Leaves thick, generally widest above the 
middle, 3-6cm. (1144-214 inches) long, 
stamens not on the petals, drupe with 
moresihan le seedicet aaclss- Uke oe AQUIFOLIACEH......... 224 
Leaves not thick, generally widest at or 
below the middle, 6-15 em. (214-6 
inches) long, fruit with 1 seed......... CORNACE BG i een es 244 
(©. Leaves with more than 1 primary vein. 
Staminate and pistillate flowers in catkins. 
UTIs ola yaeee Oe eoie Wc 2 leaks 0 RA ae Populus IN 
DALI CAGE Alyce ae 43 
TE TRO HTH IGEN Oe US ea EL ee ey a a A Morusi1n Moracez... 149 
Staminate and pistillate flowers not in catkins. 
Pistillate and staminate flowers separate. 
Leaves 3-nerved at the base, fruit a 1-seeded 
Gruper tess ev Sp eee ee Mine acta revise aapencnay CELTIS IN ULMACER... 14 
Leaves 5-nerved at the base, fruit a head of car- 
pels or achenes. 
Bark fissured, not peeling off in flakes, leaves 
LTO UMN CVGL Capra tetas ante cates ya acis meg eee eat pclMariR LC ALTINGINACE........ 163 
Bark peeling off in flakes, leaves not aromatic..PLATANACEE.......... 164 
Pistillate and staminate flowers in one. 
HEpreurnibs isyaseey cys eat cones ents ars toe meh tive ee ated PL) ARITA CRAG ee ae eee 240 
PUA pL ES NY, ceils Jaca ltecnshanss asi Macon ae retalen Peet octets, 5 MATA CRAB 255. ocean: 167 
