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Show [ 7 J 13G halting at Santa Ft·, in latilucle 3.) 1 41' , on a tributary of the Del Norte, about 15 miles di~tant from the Del Norte, and aboul 1,500 feet ahovc that river and G, 50 ahcn the sea. From Augu~t 18th up to the 1·1th Octob<'l', all the collections were mad(• in New l\1{')1.ico, in the 'alley of the Del Norte', or on the table land s adj<H'<.•nt, and bC'twern Santa F6 and tbc 3:3d para 1le 1 of I at i t u d <' ~ ( 2:3 0 m i le s h e 1 o w S a 11 t a F 6 . ) Prom the 11th October to th · 19th, we wen• crossmg the great dividing ridge between the watns of the Del Norte and the waters of th • Oila, lH'arly on the 33d parallel of norlh latitude, and between the 107th nnd lODth meridians of longitude, mea. lll'ecl from G r en w i c h. 'I' b • great <.' s t h c i g h t of th is d i \' i d i 11 g rid g r a 1 on g our trail ·was about G,OUO feet ahove th' s<'<L From the 19th of October to the .2.2d November, w were following the course of the Gila river, occasionally forced into the mountain s to avoid 1 he c u ii o n s . T h is r o u t c i s n c v c r far from t h c 3 3 t l parallel of latitucle, ancl is emhra.red between the 100° an<l 114° 30' meridians of longitude, falJiug,during that clistan('c, very uniformly from about 5,000 feeL to ncar th ·len·! of the sea. From the 22d N ovembcr 1 o the 24th, w' were on the Colorado of th west, travrrsing a low sandy bottom. From the 2-tth N on·mber to the 28th we were cro~sing the great desert of drifting san<l in a course little north of we t. On the .2t lh Novcml.H·r, we encrunped at th · Cariso (H.c ·d) e1cck or spring, the watns of whi ch, when ftr:t exposed, ar warm, and emit th<· smell of sulphurdtcd hydrogen. . From the 28th Nov 'tllbcr \rc commctH'cd to asccncl the Conlilleras of California, (the <·ontin11alion of whic·h forms tl1e peninsula of Lower Ualifornia,) and reached the hi g hest point of the route December 5th, 3,000 feet a hove the s ·a, and as many below the overhanging peaks. From that point we clcsc·rnded to San Diego, a . eaport on the level of th' r'H'a, in latitude 3.2° 4.5' and lon gitude 117° 11' west of Greenwich. This point we reached December 12. With great respect, very truly yours, Professor ToRREY, Princeton. \V. H. El\IORY. RANUNCULACBJE. Ranun ctllus a(]naticus, Linn. Plain of th~ Arkansa Clematis Virgwiaua, Linn. Raton mountain. An undctrrmin cl species of this genus wa · founcl in fruit N ovembcr lOth on the Gila. The plumose tails of the carpels arc nearly three inches long. BERBERIDACEJE. Berberis pinnata, Lagasca. Highlands bordering the Gila. This appe.ars to ~c a common specie in the southern part of Upper Callforma, and In N orthc rn lVIexico. 137 [ 7 J CHU JFEHJE. . . . 1 I· Ul Va11ey of the Arkattsas. . IJrpldlllm nulel a e, .. u N tl 'l'ributat ies of th, Can ad tan. Er) :-;im um Arkansan utn, u · CAPP Altl DAUEJl •:. . . . l , na(. In Ilown antl fruit. Scptcm.hrr .2G-P o1anls~a gril.Y<'O c.ns, t~ j)c1 Norte. The plant lS tallrr, <lnd th' 0 c to h c r 3' v" ll.r y ~ jl lt h h r <: r than in t he form that is com m o n tn flowers arc ronstdn.t bY • g the north<':n U n~t<.·d .. St~cst This beautiful Rpccies i abunl1ant on C I ' o xn <' lll t e g rt f n lt ,1. ' 1.d. . . l ' l· i n R o t 0 r c g on ' a n. d t h c both sides of the mount<uns, fro .m ltt~J~ .t ·tl upper waters of the Platte, to lalttu< e not L VIOLA 1 EJ1~ . Viola ·ucullatn, Linn. Pawnc, fork of thr Arkansas. PORTULACACElE. l>ortuln ca o 1e racca, L'.In n . On the Arkansas. p •rhnps intro-clu cecl. 1 . 1 .n wcr and Sesu\ium portulacastrurn, .. 11111. n ° 1 \ fruit, Novc•mbrr 17. 'aline soilsal ongtheUila. L.cavcsspatu a('. F 10 \\ • r s 11 e a r l y sesu1e, stamens numerous. ~·tyl·s 3. UERANlACE Jl~. G cranium Frcmon tii, 'L'on· · in Fn~ m. 2d Rep · On the Raton. TYG OPIIYLLA 1E1E. Ka11str~mia maxima, 'Io' ?T . an(z G r. T rib u 1u s maxim u R, L in 11 • Tributarirs of th Canadian. C t z t " Jo- Larr<' a Mcx1. cana, .Afo·n rand ' 1· c. t · 4 · " rCO'IO e ]J an · 11 · f 1 nali~m deodondo of th' N w Mc~icnns. 1.! st•d c~ttrna\a~t ~;0:~\';: , ~lp.p .~ A shrub from three to SLX f'et ]llgh: )tl~~ Nort' to the great waters of the Arkan:as, and va11(·.Y of .th D .. tl norllH'rn sanely (1 s rts of California. ll l1k '~ 1 • <' oceut .lrl, · 1 csinous l)·~rts of M' ico. The ])lant abounds tn a stro_ng. smclll lllg fr . f el mn att• r. No' animal scclns to f· eed on 1· t, an(l 1 t lS· u sc ess• or u ' as it can scarcely be made to bnrn. ANACARDIACElE. Rhus glabra, Linn. From the upper part o f ll1 Arkansas to longi lucie 107°. • Mountains of California to- R. lauriua, Nutt. A large shrub. wards the · a coast. · h f d I") · l n' 1 o b a t a, N u tt . On the Gila. A shrub 18 inches htg ' oun |