i i i 
ALNUS BETULACE 615 
MYRICA 
feet high and 1-4 feet in diameter, with dark brown bark blotched with 
white: leaves oval to elliptic, thickish, dark green above, pale or whitish 
beneath with prominent rusty-pubesceut veins, coarsely serrate and finely 
serrulate, 2-8 inches long, acute or shortly acuminate, rounded or narrowed 
below to petioles 6-18 lines long: staminate aments reddish, 2-6 inches 
long; the pistillate ovoid to oblong, 6-12 lines long, the bracts muck thick- 
ened above: nutlets more than a line long, nearly orbicular or oblong, 
surrounded by a narrow somewhat membranous wing. Common in moist 
places, California to Alaska. 
A. rhombifolia Nutt. Sylva, i, 33. A tree 30-50 feet high, with white 
bark which becomes broken rectangular flakes: leaves rhombic-ovate to 
eiliptic or obovate, mostly cuneate at base and obtuse at the apex, 2-3 
inches long, irregularly glandular-dentate : fruiting aments oblong, 6-8 lines 
- long, the bracts rather thin above: nutlets a line long, very broadly obovate 
with a thickened margin. Eastern Washington to California. 
A. tenuifolia Nutt. A. incana var. virescens Watson. A shrub 4-20 
feet high with brown bark: leaves more or less broadly ovate, 2-3 inches 
long, acute, rounded or slightly cordate at base, acutely doubly toothed, 
light green and glabrous on both sides, or sparingly pubescent: staminate 
aments rather slender, 1-2 inches long: fruiting aments ovate-oblong, 4-6 
lines Jong: nutlets rounded-obovate, slightly margined, 11g lines long. In 
wet places in the mountains, Alaska to California and the Rocky Mts. 
A. serrulata Willd Sp. Pl. iv, 336. A. rugosa K. Koch. A shrub 
5-10 feet high, or sometimes a small tree 40 feet high, with smooth bark, 
the young shoots sometimes pubescent: leaves green both sides obovate or 
oval, mostly obtuse or rounded at the apex, narrowed or rounded at base 
sharply and minutely serrulate when mature, glabrous above, usually 
pubescent on the veins beneath, 3-5 inches long, on petioles 4-12 lines long: 
aments appearing from naked buds much before the leaves, the staminate 
2-4 inches long, the pistillate ovoid 5-9 lines long when mature :nutlets 
a tahoe narrowly coriaceous-margined. In wet soil. Idaho to the Eastern 
tates. 
~ A. ‘sinuata Rydb. A small tree or shrub 9-15 feet high, erect or as- 
_ cending: bark rather dark except on old stems: leaves ovate, acuminate, 
obtuse or cuneate at base, bright green, doubly dentate, glabrous above, 
nearly so beneath, thin, very gummy when young, 2-4 inches long, on 
slender petioles 5-12 lines long: fruiting aments 7-9 lines long, on slender 
longer peduncles. Eastern Washington. 
OrpEr XCI MYRICACEZA Dumort. Anal. Fam, 95. 
Shrubs or trees with alternate simple leaves and small diccious 
or monecious flowers in bracted aments without calyx or corolla. 
Flowers scelitary in the axils of the bracts: staminate with 2-15 
stamens sinserted on the receptacle: filaments short distinct or 
somewhat united: anthers ovate, 2-celled, the cells longitudinally 
dehiscent: pistillate with a solitary 1-celled ovary subtended by 
2-8. bractlets: ovules: solitary, orthotropous: style very short: 
stigmas 2, linear. Fruit a small drupe or nut, often waxy. Seed 
erect, orthotropous, with thin testa and no albumen. 
1 MYRICA L. Sp. 1024. 
Shrubs’or small trees with alternate mostly resinous-dotted 
leaves and small flowers in bracted aments. Staminate aments 
oblong or narrowly cylindric expanding before or with the leaves. 
