120 MYRICACEAE. 



but not common within our limits (Pajaro River, Alameda Creek, Mitchell 

 < 'anon at Mt. Diablo). 



P. tremuloides Michx. Aspen. Leaves round-ovate, 1 to 2 in. long; stamens 

 6 to 12. — High Sierra Nevada. 



MYRICACEAE. Sweet-gale Family. 

 Shrubs or sm:ill trees. Leaves fragrant, alternate, simple, resinous-dotted, 

 without stipules. Flowers in oblong or cylindrical catkins, unisexual, solitary 

 and sessile in the axils of scaly bracts; perianth none. Staminate flower 

 with 4 to Hi stamens, the bractlets usually 2; pistillate flower surrounded at 

 base by 2 to 4 small scales or bractlets; ovary 1-celled, 1-ovuled; stigmas 2, 

 filiform, sessile. Fruit a nutlet. Seed without endosperm. 



1. MYRICA L. Wax Myrtle. 



The only genus. (Greek murike, the ancient name of the Tamarisk.) 



1. M. calif ornica Cham. Wax Myrtle. Thickly branched evergreen 

 shrub or small tree, 8 to 25 ft. high; leaves thickish, dark green, glossy, oblong, 

 or oblanceolate-oblong, tapering above to an acute apex, narrowed below to a 

 petiole, 2% to 5 in. long, remotely serrate or almost entire; flowers monoecious; 

 catkins 2 to 5 lines long or more, the pistillate in the upper, the staminate in 

 the lower, axils; androgynous catkins often occur between, with the staminate 

 flowers at base; stamens 7 to 16, united by their filaments into a cluster longer 

 than the bract ; ovary ovate, stigmas bright-red ; fruit globose, brownish purple, 

 covered with a coat of whitish wax, 2 lines in diameter, the bractlets at the base 

 minute. 



Sand-dunes, moist hillsides, forest slopes, or rocky declivities near the ocean 

 from Santa Monica northward along the entire Californian coast. 



M. HARTWEGII Wats., Sweet Bay, a deciduous shrub of the Sierra Nevada 

 with dioecious flowers; stamens 3 or 4, shorter than the bract; bractlets exceed- 

 ing the glabrous nutlet. 



JUGLANDACEAE. Walnut Family. 



Deciduous trees with pinnately compound leaves without stipules. Flowers 

 monoecious, appearing after the leaves. Staminate flowers numerous in pendu- 

 lous lateral catkins. Pistillate flowers few on short erect terminal catkins. 

 Ovary 1 to 3-celled, inferior. Fruit a nut with a dry husk; seed one, deeply 

 2-lobed. 



1. JUGLANS L. Walnut. 



Bark strong-scented. Branchlets hollow, divided into little chambers by 

 pithy partitions. Buds nearly naked. Staminate flower with an irregularly 

 :i i«» 6-lobed calyx and numerous stamens. Pistillate flower with a 4-lobed calyx 

 Seed so lobed as to fit the irregularities of the nut. (Latin Jovis, Jupiter, 

 and glans, nut.) 



1. J. californica Wats. CALIFORNIA BLACK Walnut. Shrub or tree, low- 

 branching, 10 to 30 ft. high; leaflets 11 to 19, oblong-lanceolate, serrate, 1% 

 to 4 in. long; nut globose, % to l 1 /* in. in diameter. 



Southern California from Santa Barbara Co. to San Bernardino and the 

 Sierra Santa Ana. Var. hindsii Jepson. Trees 50 to 75 ft. high with tall 

 trunks; nuts 1 to 1% in. in diameter. — Walnut Creek; lower Sacramento River. 

 Also in tin- Napa Range. 



