SlMARUBACEAE 79 



bundle-traces; no stipule scars; small hairy edged buds; 

 abruptly pinnate leaves with several nearly entire lanceolate 

 leaflets; small dioecious greenish flowers in stalked terminal 

 clusters; and black several-seeded berry-like drupes. 



1. Bark soft-corky: twigs* orange. P. amurense. 

 Bark not corky: twigs red or purplish. 2. 



2. Twigs glabrous. P. sachalinense. 

 Twigs somewhat hairy. P. chinense. 



SKIMMIA. 



Evergreen shrubs with alternate subsessile simple pellucid 

 glandular leaves; small imperfect polypetalous white flowers 

 in terminal clusters; and rather small red berry-like fruits. 

 Leaves oblong or obovate. S. japonica. 



ZANTHOXYLUM. Prickly Ash. 



Deciduous (or in warm countries evergreen) aromatic 

 shrubs or small trees with yellowish wood with minute ducts, 

 slightly smaller and les's crowded in summer, and fine medul- 

 lary rays; moderate rounded twigs with prickles (sometimes a 

 pair beside each leaf-scar) ; rounded continuous pith; alternate 

 somewhat raised half-round or 3-lobed leaf-scars with 3 bundle- 

 traces; no stipule-scars; round red-hairy superposed buds with 

 indistinct scales; odd-pinnate pellucid-punctate moderate 

 sometimes prickly leaves; small dioecious polypetalous flowers 

 in axillary clusters or panicled; and small leathery capsules, 

 each with 1 or 2 round black seeds. 



1. Prickles by leaf-bases large, deltoid-acuminate. Z. Bungei. 

 Prickles not greatly dilated at base. 2. 



2. Flowers 1 panicled: leaflets glossy, falcate. Z. Clava-herculis. 

 Flowers clustered in the axils. Z. americanum. 



Family SlMARUBACEAE. Quassia Family. 



A rather small family of little economic importance; 

 chiefly known in temperate regions through the too-common 

 use of the tropical-appearing ailanthus. 



