KEY TO IMPORTANT WOODY PLANTS 87 



2. Leaves with 3 leaflets; "berries" (drupes) whitish or red, in 

 erect or drooping clusters (panicles or panicled spikes). 

 7. End leaflet stalked; leaflets glossy, turning brilliant red in 

 fall, usually egg-shaped; "berries" whitish, shiny, ribbed or 

 lined; sap resinous or sometimes milky -whitish; leaf sears 

 crescent-shaped, distinct, with 5 bundle traces; almost all 

 plant parts poisonous to touch by susceptible persons although 

 often browsed by livestock without any ill effect. 



poison-oak, poison-ivy (Toxicodendron) . 

 8. Leaflets blunt or rounded at tip; margins entire to bluntly 

 toothed or lobed; "berries" in loose, drooping clusters; 

 low to tall shrubs, or woody vines climbing by aerial root- 

 lets; dry woods, along roadsides, mostly w. of Cascades but 

 coming' through Columbia River gorge to e. of The Dalles 

 on both the Oreg. and Wash, sides of the river. 



Pacific poison-oak (Toxicodendron diver silobum). 

 8. Leaflets sharp- to taper-pointed at tip; margins entire or 

 coarsely and sharply toothed or lobed; "berries" in dense, 

 erect or ascending clusters; low, erect or clambering shrubs 

 connected by creeping underground stems, not climbing 

 by aerial rootlets; sunny, rather moist sites, often common 

 locally, e. Oreg., e. Wash. 



western poison-ivy (Toxicodendron radicans var. 



rydbergii). 

 7. End leaflet stalkless (appearing stalked because of tapering, 

 wedge-shaped base), nearly as broad as long, shallowly to 

 deeply lobed or 3-parted; leaflets dull, reversely egg-shaped; 

 "berries" red, sticky-hairy, in dense, spikelike end clusters; leaf 

 scars and bundle traces indistinct ; low, much-branched shrubs 

 with disagreeable odor; not poisonous; often in dense stands in 

 dry sites, se. Oreg., not reported from Wash. 



skunkbush (or lemonade) sumac (Rh us trilobata). 

 1 . Plants armed with prickles and or bristles. 



blackberry, raspberries, salmonberry (Rubus spp.), 



and roses (Rosa spp.). 

 9. Stipules attached to leafstalk only at base, flaring at tips, linear 

 or narrowly lance-shaped. 



blackberry, raspberries, and salmonberry (Rubus spp). 

 10. Stems (canes) soft- woody, large-pithy, living 2 years, leafing 

 1st year (new canes), flowering, fruiting, dying second year 

 (old* cane) ; new canes each year from perennial, woody under- 

 ground parts and/or woody crown or from canes rooting 

 at tips; leaves with 3 and/or 5 or 7 leaflets, or sometimes 

 simple and lobed or parted; flowers white. 



trailing blackberry, raspberries. 

 11. Stems trailing, long-running, rooting at tip, unbranched 

 except for short, erect flowering shoots on old canes; 

 prickles short, straight or hooked; tack-shaped glands on 

 flower stalks and sepals; male flowers larger than female, 

 often on separate plants; blackberries not hollow, not 

 falling free when ripe; burns, cut-over lands, common w., 

 occasional e. of Cascades, Oreg., Wash.; type locality 

 Columbia River Valley. 



trailing blackberry (Rubus macropetalus) . 



