symphoricarpos. VIBURNACEiE. 281 



XYLOSTEON 



§ 1. Corolla urceolate or open-campanulate, only 2-3 lines 

 long. 



S. oecidentalis Hook. Fl i, 285. Glabrous or strictly pubescent : ro- 

 bust; leaves oval or oblong, thickish, 2 inches long; axillary flower clus- 

 ters not rarely pedunculate, sometimes becoming spicate, 4-12 lines long: 

 corolla 3 lines long, 5-cleft to below the middle; densely villous-hirsute 

 with long hairs within : stamens and style more or less exserted ; style 

 glabrous; fruit white. Rocky grounds, eastern Oregon to Michigan and 

 north to lat. 64 degrees. 



S. raceinosus Michx. Fl. i, 107. An erect shrub, 2-10 feet high, with 

 slender branches: leaves round-oval to oblong, 6-18 lines long, entire, or 

 those of young and vigorous shoots sometimes irregularly lobed or toothed, 

 smooth above, more or less pubescent beneath: flowers in short and sev- 

 eral-flowered axillary clusters or spikes : corolla 2-3 lines long, 5-lobed 

 above the middle, villous-bearded within; narrowed at base: stamens not 

 exserted; style glabrous, not exceeding the stamens: fruit white, 3-8 

 lines in diameter. Common, California to Alaska and across the con- 

 tinent. 



S. paueiflorus S* racemosus var. pauciflorus Bobbins, at least in part. 

 A prostrate shrub with slender stems 1-3 feet long: leaves oval to oblong. 

 6-18 lines long: the lower ones and those of vigorous shoots variously 

 lobed or toothed: flowers in small, 1-few-flowered, loose spikes; corolla 

 small, 5-lobed above the middle, villous within: stamens not exserted; 

 style glabrous, not longer than the corolla: fruit white when mature, de- 

 pressed globose, 3-6 lines in diameter. In forests, Oregon and Washing- 

 ton, west of the Cascade Mountains. 



S. acutas S. mollis var. acutus Gray Syn FL i. 14- Low, diffuse or 

 decumbent, soft-pubescent ; leaves oblong-lanceolate to oblong, acute at 

 both ends or acuminate, sometimes irregularly and acutely dentate, very 

 soft-tomentulose : flowers solitary or in short clusters ; corolla open-cam- 

 panulate, with a broad base, 5-lobed above the middle, barely pubescent 

 within ; stamens and style included. Washington to California, east of 

 the Cascade Mountains'. 



>j '2. Corolla from oblong-campanulate to salveribrm, 5-lobed 

 only at the summit: flowers mostly axillary. 



S. rotundifolius Gray PI. Wright ii 66. Tomentulose or glabrate: 

 stems rigid, much-branched, 1-3 feet high: leaves from orbicular to ob- 

 long-elliptical, thickish, t>-w lines long: entire or coarsely lobed : corolla 

 elongated-campanulate, 3-4 lines long, its tube pubescent within below the 

 stamens, twice or thrice the length of the broad lobes : stamens and style 

 included: fruit white, globular or oblong; nutlets oval, equally broad and 

 obtuse at both ends. On rocky ridges in mountainous districts, Washing- 

 ton to California and New Mexico. 



S. oreophilus Gray Journ Linn. Soc. xiv, 12 Glabrous or some- 

 times with soft pubescence: leaves oblong to broadly oval, thickish, 6-10 

 lines long: corolla tubular, 4-6 lines long, its tube almost glabrous within, 

 4 or 5 times as long as the broad lobes : nutlets of the white drupi oblong, 

 flattened attenuate and pointed at base. Mountains of eastern Oregon to 

 California and Arizona. 



5 XYLOSTEON Tourn. 



LONICERA § XYLOSTEON DC. Prodr. iv, 333. 



Erect or merely trailing shrubs with membranaceous leaves 

 that are all distinct, and rather small flowers on usually 2-flow- 



