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late; fruit a 2-seeded samara. Leaves oppo- 

 site, imparip innate, deciduous. " . 



1. N. CALIFORNICUM Torr. & Gray. San 

 Mateo. Marin County. Spring. 



ORDER 6. CELASTEALES. Parts of the 

 flower correspondent in number. Disc tumid, 

 adnate to the base of the calyx. Stamens in- 

 serted with the petals on the margin of the 

 disc. Ovules definite. 



Family 1, RHAMNACEJE, 



Calyx conspicuous, gamosepalous, valvat in 

 aestivation. Stamens inserted with the petals 

 and alternate with the calyx lobes. Ovary 2- 

 3-celled ; cells 1-ovulate. Styles 2-3, more 

 or less connate. 



1. Rhamnus Jusa. 



Calyx-tube urceolate, margin 4-5-cleft. Pet- 

 als minute, with short claws, or 0. Ovary free. 

 Fruit a 2-3-pyrenous drupe. Leaves alternate, 

 stipulate. ^ . 



1. E. CROCEA Nutt. Flowers 4-merous, ape- 

 talous; fruit red. Lake Chabot. San Eafael. 

 Taylorville. Spring. 



2. E. CALIFORNICA Esch. Flowers 5-merous; 

 petals small, ovate, emarginate ; ripe fruit 

 black.- Common. Summer. 



"Cascarasagrada" of. the old Californians. An 

 infusion of the bark of this species and of B. 



