NOTES ON NORTH AMERICAN TREES. II. CARYA 
C. S. SARGENT 
Conspectus of the species of the United States 
Bud-scales valvate, the inner strap-shaped and only occasionally slightly 
accrescent; fruit more or less broadly winged at the sutures (A pocarya 
C. DCO 
Shell of the nut thin and brittle; leaflets more or less falcate. 
Aments of staminate flowers nearly sessile, usually on branches of the 
previous year; lobes of the seed entire or slightly notched at apex. 
Leaflets 13-15; nut ovoid-oblong, cylindrical: seed sweet..1. C. pecan 
eaflets 7-11; nut oblong, compressed; seed bitter...... 2. C. texana 
Aments of staminate flowers pedunculate, on branches of the year or of 
the previous year; lobes of the bitter seed deeply 2-lobed. 
Leaflets 7-11; nut cylindrical or slightly compressed. .3. C. cordiformis 
Leaflets 7-13; nut compressed, usually conspicuously wrinkled 
4. C. aquatica 
Shell of the ellipsoidal nut thick and hard; lobes of the sweet seed 
deeply 2-lobed; leaflets 7-9, occasionally 5, rarely slightly falcate; aments 
of — flowers long-pedunculate at the aes of branches of the 
POE ee ee ee ak ay . C. myristicaeformis 
Buit-assles imbricated, the inner Sencmning much es and often highly 
colored; aments of staminate flowers on peduncles from the base of branches 
of the year, rarely from the axils of leaves; fruit usually without wings; 
seed sweet, its lobes deeply 2-lobed (Eucarya C. DC.). 
Branchlets usually stout, slender in no. 7; involucre 6-12 mm. in thickness, 
opening freely to the base. 
Bark on old trunks separating into long, broad, loosely attached scales; 
nuts pale. 
Branchlets light red-brown; shell of the nut thin. 
Leaflets 5 or rarely 7, obovate to ovate, acute or acuminate; nut 
much compressed, often ine ponte’ at apex; branchlets glabrous 
OF OA ae. Ge 6. C. ovata 
Leaflets 5, lanceola ate, acuminate; nut little compressed, acute at 
apex; branchlets slender, glabrous. ..7. C. carolinae-septentrionalis 
Branchlets pale orange color, pubescent; leaflets weed 7-9; shell of 
SUNG TA PU ok ek ee ee . C. laciniosa 
Bark not scaly, on old trunks dark, deeply ridged; es 7-9, often 
subcoriaceous, pubescent below; nut reddish brown, often long- 
pointed, thick-shelled; branchlets pubescent........... 9. C. alba 
449) [Botanical Gazette, vol. 66 
