KEY TO IMPORTANT WOODY PLANTS H 



branches and crown-sprouting or layering after fire or top 

 injury; alternate hosts to the white pine blister rust. 



currants, gooseberries (Ribes spp.). 

 8. Spines 3- to 9-parted; flowers 3-20, saucer- or shallow ly 

 bowl-shaped with spreading calyx lobes; berries covered 

 with gland-tipped bristles, jointed to their stalks (pedicels), 

 falling free when ripe; twigs brownish, prickly and/or bristly 

 between joints (especially in sunny sites). 



currants (Ribes spp.). 

 9. Leaves deeply 5- to 7-lobed, to 2 l / 2 inches wide, nearly 

 hairless; margins cut-toothed ; leafstalks often as long as 

 leaves, with coarse, gland-tipped hairs near base; twigs 

 whitish-hairy but without gland-tipped bristles; spines 

 weak and short; flowers often 10-15; currants purplish 

 black ; much-branched shrubs, erect and to 3 or 4 feet high, 

 or, if in shade, trailing and with weaker spines and 

 prickles; shade-tolerant; often reproducing by layering; 

 very susceptible to white pine blister rust; moist sites in 

 mountain woods; widely distributed in e. Oreg., e. Wash. 

 prickly (or swamp) currant (Ribes lacustre). 



9. Leaves deeply 3- to 5-lobed, to 1 inch wide, with gland- 

 tipped hairs on both surfaces; leafstalks usually shorter 

 than leaves; twigs with gland-tipped bristles in addition 

 to prickles; spines rigid, rather stout and long; tlowers 3-7; 

 straggly, stiff -branched shrubs to 4 feet high; on rocky, 

 exposed sites at higher (often subalpine) altitudes, some- 

 times near snowbanks; Cascades, Wallowa and Blue Mts., 

 e. Oreg., e. Wash. 



gooseberry currant (Ribes montigenum). 

 8. Spines single or 3- (rarely 4-) parted; flowers 1-5, bell- 

 shaped or tubular; calyx lobes often spreading or recurving 

 in age; berries falling with stalks attached. 



gooseberries (Grossularia section of Ribes). 



10. Mature leaves l-2y 2 inches wide, 3- to 5-lobed; styles 2 

 in each flower; erect or spreading shrubs ; moist woods or 

 streambanks. 



1 1 . Spines less than V 2 inch long. 



12. Gooseberries with gland-tipped spines; leaves and 

 leafstalks with gland-tipped hairs; spines mostly 3- 

 forked, stiff; stems stout, rarely prickly or bristly 

 between joints; flowers bell-shaped, green, usually 

 sparsely hairy outside; petals white; styles hairless; 

 middle altitudes, e. slopes of Cascades from Mt. 

 Hood, Oreg., n. into Wash.; type locality, Wash. 



Watson (or Mt. Adams) gooseberry (Ribes 



watsonianum) . 

 12. Gooseberries smooth; styles hairy. 



13. Twigs white or pale straw-colored, rarely prickly 

 or bristly between joints; spines weak, usually 

 single, sometimes absent; gland-tipped hairs usu- 

 ally lacking except near base of leafstalk; flowers 

 bell-shaped, greenish or purplish-tinged; petals 

 white, or sometimes pink. 



