-|gg ROSACE.'E. Prunus. 



§ i. Fruit less jmlfi/ : done thin : leafless racemes from the axils of evergreen 

 leaves. — Laukockuasus. 



4. P. ilicifolia, Wiilp. (Islay.) A much-bmuclietl ovoigruen shrub, S to \'l 

 feet hij^h, with ^Muyisli-browii bark, nlubrous : Iwivea thick and ligia, shining 

 ubovo, broadly ovuti> to ovale laimuolato, obtiiso or uciito, tninoato or .soiiinwhiit 

 cordato at ba'so, tf[>iiK)si'ly toothed, an inch or two long, very shortly petioled : 

 dowers small, in racemes A to 2 inches long : fruit large (half an inch thick or 

 more), somewhat obcompressed, apiculate, usually red, sometimes dark purple or 

 black; the thin pidp sumewhat acid and astringent but of pleasant llavor. — Cerasiis 

 ilici/o'lius, Nutt.; 8ylva, ii. 10, t. 47 ; Hook. & Arn. Uot. r.eechey, 340, t. 83. 



On dry hills of the Coaat Hivngcs troiii Sun I'^rani'iHco to Sun Diego, and in We.stein Arizona, 

 Bi(jcl(nu. A very onunicntal .species, with shining dark green foliage, soniewliat like the Holly. 

 It flowers from March lu May, maturing its fruit in November and December. 



§ 5. Fruit velvety-pubescent, subjlobose: stone smooth or nearly so : Jiowers solitary or 

 in pairs, from lateral scaly buds, apj^earincj with the leaves: calyx somewhat 

 2)ersistent. — 1vmi'li.;ctoclauus, Gray. (Emjdectocladus, Torrey.) 



5. P. Andersonii, Gray. A low diffuse glabrous shrub, 1 to 6 feet high, with 

 grayish-brown bark and spincscent Itranchlets : leaves mostly fascicled, oblanctso- 

 lale, acute, attenuate to a short petiole, a half to an inch long, wparingly 8(!rrulatii : 

 peduncles shorti^r than the leaves : llowers- rose-colored, half an inch broail ; the 

 petals orbicidar: fruit with thin llesli, llattened glol)oso, acute, 6 lines long; .stone 

 compressed, acutely margined ni)on one side and furrowed U[)on the other, acute at 

 l)oth ends, somewhat ridged. — Proc. Am. Acad. vii. 337 & x. 70. Watson, Bot. 

 King Exp. 71). 



Sierra Co. (Lemmon), and frequent on the foot-hills of Northwestern Nevada. The fruit more 

 nearly resembles the peach than does that of any other of our species. This whole section, in- 

 deed, of live species conlined to tlii^ interior of the continent and to Mexico, shows the nearest 

 approach in the American flora to the old genus Ainytjikdus of the Old World. 



(). P. fasciculata, (Iray. A divaricat(^ly branched shrub, *J or 3 feet high, 

 with gray bark, glabrous : leaves fascicled, narrowly spatulate, obtuse or acutish, 

 nearly sessile, half an inch long, ob.soletely 3-nerved, entire : llowers sessile or 

 nearly so, very small: pcd-als liiu;ar, white, n^curved : stamens 10 to 15 : style very 

 short : fruit subglobose, 5 or <) lines long, hirsute-tomento.se, the Ilesh thin : stone 

 acute at both ends, smooth, subglobo.se, obtusely and scarcely at all margined. — 

 Proc. Am. Acad. x. 70. l-hnpUrtoclidus Jasricnlatus, Tornty, I'l. Frem. 10, t. f). 



In the Soiitliirn Siena Nevmlu {h'r.minit); .sunimil of rn.videiirc Mountains (' '„.7»/) ; Arizona 



U. NllT'l'Al.l.IA. I"" ^ 'ion 



KloWiMM pnlvHiniludlHrlMUM, t 'id V \ I lnl.Ul.ll.' e.illipnllldMl l>, Tt Ii.ImmI, dorjiluMin.. 



I'>'I(\U n. brotidl.Y Mpiihd.tlo. PIP. I Miiiuii'iirt If), III Iw.t I'oWB, IU liiRcrlcd wllli tlio 



pHnU. iind n lower down m| Ilioilifd* IImIiih Mm tubo ; lll.iMiniilM v.'iy «linrl, thn 



lower ileelinod. Carpols r>, iiiserteil upon the porsibtent buBO of the calyx-tuhe, frco, 

 glabrous : styles short, lateral, jointed at base : ovules 2 in each carpel, pendulous. 

 Fruit 1 to 4 oblong-ovoi.l 1-seeded drupes, with thin pulp and smooth bony stone. 

 Cotyledons convolute. — A shrub, with alternate simple entire deciduous leaves ; 

 stipules none; llowers white, in loose nodding racemes, which apjjoar with the 

 branchlets from the same buds. A single species. 



1. N. cerasiformis, Torr. & Gray. (Oso Berry.) A .shrub or small tree 2 to 

 15 feet high, with dark brown bark and rather slender branches, glabrous : leaves 

 rather broadly oblanceolate, acute, attenuate to a short slender petiole, 2 to 4 inches 



