KEY TO THE SPECIES OF WALNUTS 



1. Leaves with 9-29 toothed leaflets; nut with thick, bony partitions; 

 native species. 



2. Fruit ovoid-oblong, in clusters of 3-5; band of pale hair separating 

 leaf scar from bud; leaflets 11-17, oblong-lanceolate; heartwood 



light brown, soft; eastern J. cinerea. Butternut, p. 137. 



2. Fruit globose, solitary or in pairs; buds not separated by hairy 

 band from leaf scar; heartwood dark brown, hard. 

 3. Frvut 1 K-2 inches in diameter. 



4. Nut deeply ridged; 15-23 leaflets; eastern 



J. nigra. Black Walnut, p. 137. 



4. Nut smooth or faintly grooved; 15-19 leaflets; California. . . 

 J. hindsii, Hinds Walnut, p. 134. 



3. Fruit 1-1 H inches long; nut grooved; leaflets 9-13 (rarely to 

 19), oblong-lanceolate; Colorado, New Mexico, and Arizona. . . 

 J. major, Arizona Walnut, p. 134. 



3. Fruit }i-H inch long; nut grooved. 



5. Leaflets 17-23, narrow-lanceolate; Oklahoma, Texas, and 

 New Mexico J. microcarpa, Little Walnut, p. 134. 



5. Leaflets 11-15 (rarely to 19), oblong-lanceolate; California. 



J. calif or nica, California Walnut, p. 134. 



1. Leaves with 5-9 (rarely to 13), entire or nearly entire leaflets; fruit 

 globose, 1 H-2 inches in diameter; nut wrinkled, with thin partitions; 

 widely planted in warm areas. . . J. regia, English Walnut, p. 134. 



* * * 



MYRICACEAE 



Waxmyrtle. Bayberry 

 Myrica L. 



Three species of this usually shrubby genus may form small 

 trees. This genus is easily distinguishable by its simple, alter- 

 nate, aromatic, persistent leaves, which bear minute, resinous 

 dots; dioecious or monoecious flowers in aments; small, glo- 

 bose, drupaceous fruit, covered with wax and containing a 

 thick-walled nut; slender twigs without terminal buds and 

 with scaly lateral buds; thin, smooth, whitish to gray bark. The 

 fruit wax is used in making candles. 



1. Southeastern species; flowers dioecious. 



2. Leaves oblanceolate, coarsely toothed, yellow-green with con- 

 spicuous orange glands; fruit H inch in diameter, coated with 

 thick, blue wax; coastal plain from New Jersey to Florida, west to 

 Arkansas and Texas . .Myrica cerifera L., Southern Waxmyrtle, 

 2. Leaves oblong-obovate, dark green. 



3. Leaves entire, glabrous; fruit H-}4 inch in diameter thinly 



coated with white wax ; Florida to Mississippi 



Myrica inodora Bartr., Odorless Bayberry 



3. Leaves toothed, glabrous or pubescent below, fruit 3^ inch in 



diameter thickly coated w^ith wax; coastal plain New Jersey 



to Louisiana. . .Myrica heterophylla Raf., Evergreen Bayberry 



1. Pacific coast species; flowers monoecious; leaves 2-4 inches long, 



oblanceolate to oblong-lanceolate, remotely toothed, with minute 



black glands below; fruit M inch in diameter, purple, papillose, 



thinly coated with gray wax ; coastal areas in Pacific states 



Myrica calif arnica Cham., Pa'^'^c Waxmyrtle, 



[■35] 



