36 KEY TO THE SPECIES 



2. Opulaster pubescens Rydb. (Wyoming Nine-bark). Very similar to the 

 preceding, the young shoots often unbranched, finely pubescent, especially in the 

 inflorescence; calyx stellate-pubescent, its lobes obtuse; the ovaries pubescent and 

 in fruit but slightly divergent. Common on rocky slopes. 



2. HOLODISCUS 



A freely branched shrub, with light-gray bark, numerous white flowers in 

 large spreading panicles, a deeply 5-cleft calyx, oblong petals, and 5 pubescent 

 carpels. 



1. Holodiscus duuiosus (Nutt.) Heller. Usually less than 1 m. high, erect 

 or spreading, the branchlets slender, pubescent; leaves obovate, dentate, the base 

 cuneate, pubescent or even tomentose beneath; panicle pubescent, the small petals 

 scarcely longer than the ovate acute sepals. 



3. KUNZIA 



A small, freely branched, spreading or prostrate shrub, with small fascicled 

 leaves, funnel-shaped calyx, yellow petals, about 25 stamens, and 1 (rarely 2) pubes- 

 cent carpels. 



1. Kunzia tridentata (Pursh) Spreng. Leaves cuneate-obovate, 3-lobed or 

 toothed at apex, white-tomentose beneath, greener above ; calyx tomentose, and 

 with some glandular hairs ; the broadly spatulate petals exceeding the calyx. 

 Frequent, sandy canons and foothills. 



4. RUBUS (Bramble) 



Herbs or somewhat shrubby plants with usually compound leaves and mostly 

 white flowers, a 5-parted calyx, and usually many small fleshy stone fruits col- 

 lected on a dry or fleshy receptacle. 



* Leaves simple ; stems not prickly. 



1. Rubus parviflorus Nutt. (Salmon-berry). Stems erect, 8-16 dm. high, 

 glandular-pubescent when young, becoming brown and shreddy; leaves large, 

 palmately 5-lobed, 1-8 dm. broad, more or less glandular-pubescent ; flowers few, 

 large, white; the calyx densely tomentose; berry pubescent, broad and flat, red, 

 flavor excellent. 



2. Rubus delicioBus James (Unsavory Raspberry). Stems either strict 

 or branched, about 1 m. high, pubescent but not glandular ; leaves reniform- 

 orbicular, somewhat lobed, the lobes finely serrate, 2-5 cm. broad ; flowers large, 

 white, 3-4 cm. across; fruit smooth, large, purplish, " not agreeable to the human 

 palate but prized by bears." Caflons of Colorado. 



* * Leaves compound ; stems prickly. 



3. Rubus strigosus Michx. (Wild Red Raspberry). Stems woody, upright, 

 with stiff straight bristles ; leaflets 3-5, ovate, pointed, serrate ; petals as long as 

 the sepals ; fruit light red. Thickets and hills. (See Plant Structures, p. 362, 

 Fig. 24S.) 



5. DASYPHORA 



Shrubs with pinnate, stipulate leaves; solitary or cyraose flowers (bracts, 

 sepals, and petals 5 each), and a lateral, club-shaped, glandular style. 



1. Dasyphora frnticosa (L.) Rydb. (Sbrubbit Cinquefoil). Stem erect, 

 shrubby, 3-12 dm. high, much branched ; leaves pinnate ; leaflets 5-7, crowded, 



