JUGLANDACEAE (WALNUT FAMILY) 45 



and varnished with an abundant and fragrant resin. Petioles little 

 if at all laterally flattened. Stamens 20-30. 



P deltoides, COTTONWOOD. Tree 15-30 m. high. Leaves broadly 

 deltoid. Petioles long and laterally flattened. Scales fringed but not 

 hairy. Stamens 60 or more. Capsules on slender pedicels, in long 

 catkins. Borders of streams. 



MYRICACEAE (SWEET GALE FAMILY) 



Monoecious or dioecious shrubs, with each kind of flowers in 

 short scaly catkins, and resinous-dotted often fragrant leaves. 



MYRICA 



The only genus. Flowers solitary under a scale-like bract and 

 with a pair of bractlets, the sterile in ellipsoid or cylindrical, the 

 fertile in ovoid or globular catkins, from axillary scaly buds; sta- 

 mens 2-8; filaments somewhat united below; anthers 2-celled. 

 Fruit small globular or short-cylindric, dry, coated with resinous 

 grains or wax. 



M. carolinensis, BAYBERRY. Shrub 1-2 t m. high; leaves oblong, en- 

 tire or somewhat crenately toothed, thinner and more flaccid than in 

 the preceding, mostly obtuse, 1.5-4 cm - broad, green and resinous- 

 dotted on both sides; fruit 3.5-4 mm. in diameter. Sandy or sterile 

 soil, chiefly near the coast. 



M. asplenifolia, SWEET FERN. Shrub 3-6 dm. high, with sweet- 

 scented, fern-like, linear-lanceolate leaves; stipules half heart-shaped; 

 scales of the sterile catkins kidney- or heart-shaped, pointed. Sterile 

 soil. 



JUGLANDACEAE (WALNUT FAMILY) 



Trees, with alternate pinnate leaves, and no stipules; flowers 

 monoecious; the sterile, in catkins with an irregular calyx adnate 

 to the bract; the fertile, solitary or in a small cluster or spike; with 

 a regular 3-5 lobed calyx adherent to the incompletely 2-4 celled 

 but only i-ovuled ovary. Fruit a kind of dry drupe, with a crus- 

 taceous or bony nutshell, containing a large 4-lobed seed. Coty- 

 ledons fleshy and oily, 2-lobed. Petals sometimes present in the 



