182 ROSACEA. robus. 



I. alpicola Rydberg 1. c. Viscid-pubescent : throughout: stems 3-8 

 inches high, several from a thick resinous caudex, exceeding the leaves; 

 leaflets 21-41, 2-3-lines long, 3-5-parted into cuneate-oblong or linear-ob- 

 long, obtuse, entire lobes the single cauline leaf similar, with ovate-lance- 

 olate, entire stipules: cyme capitate, many-flowered; calyx somewhat 

 scarious, campanulate, 2 lines long; bractlets linear, obtuse, % as long as 

 the lanceolate acute calyx-lobes ; petals oblong to spatulate, shorter than 

 the calyx; stamens 5; carpels 1-3; receptacle densely long-wooly. On 

 Mount Adams Washington at 5000-6000 feet elevation. 



Tribe 4. Rubese B. & H. Gen. i, 616. Calyx flattish, 5- 

 parted, mostly imbricate in the bud: stamens numerous; carpels 

 numerous, or rarely feiv, drupaceous, crowded on the conical recep- 

 tacle: ovules 2 colateral: style terminal or nearly so: seed sus- 

 pended: radical superior. 



14 RUBTJS Tourn. L. Gen. n. 632. 



Shrubs or somewhat woody, erect or trailing often prickly 

 plants or herbs with simple or pinnately 3-7-foliolate leaves, ad- 

 nate stipules and white or purple flowers in panicles or corymbs 

 or solitary. Calyx 5-lobed, persistent, without bractlets, tube 

 short and open. Petals 5, conspicuous, deciduous. Stamens 

 numerous, inserted into the border of the disk which lines the 

 bottom of the calyx-tube. Ovaries numerous, rarely few, with 

 colateral suspended ovules, becoming globose 1-seeded drupelets : 

 style nearly terminal, deciduous 



§ 1. Carpels forming a somewhat hemispherical fruit, con- 

 cave beneath and falling away from the dry receptacle together 

 when ripe sometimes few in number and falling away separately. 



* Leaves simple, palmately lobed : shrubs without prickles. 



R. parviflorus Nutt. Gen. i, 308. B. Nvtkanus Moc. Stems shrubby, 

 erect, 3-8 feet high; bark green and smooth or more or less glandular- 

 pubescent, becoming brown and shreddy : leaves round-cordate in outline, 

 palmately 3-5-lobed, the lobes acuminate, unequally serrate, 4-12 inches 

 long, tomentose on one or both sides, the veins beneath and the petioles and 

 peduncles usually hispid with gland-tipped hairs; petioles stout, often 

 with a small leaflet near the summit; stipules linear, acuminate, the upper 

 half free, ciliate : peduncles terminal, few-flowered calyx-lobes oblong- 

 ovate, 4-6 lines long with linear appendages nearly as long, more or less 

 tomentose; petals broadly ovate to elliptical, 6-10 lines long: carpels very 

 numerous, tomentose; fruit red, large, hemispherical, sweet and pleasant- 

 flavored. Common in forests and wooded districts, Alaska to California 

 and East to Lake Superior. 



* * Leaves trifoliolate, sometimes simple on the flowering branches, 



rarely 5-foliolate : stems more or less prickly. 



R. spectabilis Pursh. FL 348 t. 16. Stems perennial, shrubby and 

 branching, 6-12 feet high, with yellowish shreddy bark, copiously armed 

 when young with straight stout prickles : leaves usually trifoliolate ; leaf- 

 lets ovate, acute or acuminate, doubly incised-serrate. often 2-3-lobed, 

 the veins beneath and the petioles sparingly villous-pubescent and prickly ; 

 flowers mostly solitary, large and showy ; calyx-lobes pubescent, broadly 

 ovate, acuminate, 4-5 lines long; petals red, ovate to elliptical, acute, 6-8 

 lines long: fruit large, ovoid, red or yellow, the drupelets smooth and 

 tipped with the slender subpersistent style: achenes deeply pitted. Com- 

 mon along streams and moist places, Alaska to California. 



