RIIAMNACE^. (BUCKTHORN FAMILY.) J7 



§ 2 Seeds and nutlets convex on the bach : Jlomrs mostly perfect, in peduncutatf 

 cijmes. — Franc, t; LA. 



2. R. Caroliniana, Walter, 'riiomless .>^linil. or Htnall tree: leavea 

 oblony, ohscunly serrulate, deciduous : Jlutdrs in one form umfx-lUd, in another 

 solitary in the axils: fruit gloljose, 3 socdal. — Franifula Caroliniana, Gray. 

 From till! iiiouiitaiiis eastward across the continent. 



3. R. Californica, E.sch. A spreading slirul), with the young brauchea 

 somewhat tomentose : leaves ovate-oblow/ to elliptical, denticulate or nearly entire, 

 evergreen: peduncles with numerous mostly abortive Jloivers in subumtu Hate fascicles : 

 fruit blackish purple with thin pulp, 2 to3-lobed aud 2 to 3-8eeded. — FranyuUi 

 Cnli/hrnicn, Gray. S. W. Colorado to California. 



4. R. Purshiana, DC. Sometimes 20 feet high ; young branches tomen- 

 tose : leaves elliptic, denticulate, deciduous, snnien-hat pubescent beneath : flau-ers 

 rather larye, in a somewhat umbellate cyme: fruit black, broadly ol^ovoid, 3-lobed 

 and 3-seeded. — N. Idaho and westward in the I'acific States. 



2. CEANOTHUS, L. Xi:w Jkksey Tea. 



Flowers perfect. Calyx 5-eleft. — Shrubs or small trees, sometimes spinel- 

 cent, with petioled leaves and showy thyrsoid or cymose white (in ours) 

 flowers. — Watson, Proc. Am. Acad. x. 333. Ours all belong to the first sec- 

 tion of the genus, in wdiich the leaves are all alternate and 3-nerved, glandular- 

 toothed or entire, and the fruit not crested. 



* Branches not spiny: inflorescence thyrsoid : leaves usually large, 

 glandular-serrate. 



1. C. velutinus, Dougl. A .shrub 2 to 3 feet high, usuully glabrous: 

 leaves tliick, broadly ovate or elliptical, resinous and shining above, sometimes 

 velvety beneath : flowers in a loose thyrse : peduncles usually short. — Colorado, 

 Utah, and northwestward. 



Var. laevigatUS, Torr. & Gray. Leaves mostly glabrous beneath. — More 

 common than tlie type ; ranging from Colorado northwestward to the British 

 boundary. 



2. C. OVatUS, Desf. A shrub 2 to 3 feet high : leaves narrowly oblong or 

 elliptical-lanceolate, glandular-serrulate, nearly glal)rous: thyrse umbel-like. 

 the pedicels elongated and closely approximated. — Includes C oralis, Bigel. 

 Colorado and Wyoming. 



3. C. sanguineus, Pursh. A shrub 4 to \2 feet high: stem and Itranche.i 

 reddish: hurts broadly ovate or obovate, subcordate, serrate : thyrsoid corymbs 

 in lateral panicles, on very short peduncles. — Includes C. Orcganus, Nutt. 

 Along the Missouri and its tributaries. 



* * Branches mostly sjnno>r, tjniyish : /lowers in simple clusters : leaves 

 smtdl, entire. 



4. C. Fendleri, Gr.ay .\ shrub one or two feet high, widely antl intri- 

 catdy branched : )eove.<* oval or elliptic, silky-canesccnt beneath, smoothish 

 and green above • dowers in clusters, dense, sessile, glabrous. — Coloratio aud 

 southward. 



