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Show [7] 150 POLYGON ACE£. . Eri.ogonum tri hopes, n. sp. lcm srap -l ik , vcrlic-illately and (hnu1ca~<·ly mu ·h brau ·heel, glabrous; p •dundes c.apillary; involucre mmutc, f w flow ·red, glabrou., 4.- toot hcd; th teeth nearly equal, obtuse, c~·cct; s pal.s oval', a<' ut. , n c<~ rly equal, very hairy. E<:st ·rn slop of the . ordtll '.ras of alllornta. Our sp •eimens of tht rcmarkabl spc ·~<'s ar .m1pcrfcct , the l •aves b )ing wanting. Tlwy probably g~·ow 11~ a radtca~ cluster. The flowering stcHlS arc a. f~)Qt or more lu gh, wtth the yn~nary and s condary branch ·s v rtH~ dlate; the hranddds ar • bt-tnchotomous, and the ultimat' divi. ions or pedun cles f.lomcwhat ccund. lnvol un sca rcely half a lin' in length, 5-6 flow er ed, and only 4-tooth cl. Th flowers arc nc.arly twic as large a· the involucres, sepals concave, reel sprcadtng. tamcn. s ·arccly c sert •d . E. tomcntosum, Michx . Abundant in th rrgion between the valley .of th ~ Del Norte and th water. of the Gila; the most we.l)rn st~hon . htthcrlo found of this. RJ~ ec.ic. ~ whi ·h i almo l th only enogonum known cast of the M tsstsst p p1. . E. A bert can um, n. sp. Annual '? Can <'seen tl y tom en lose; stem dt chotomou. above; l eave~ oblong-lanccolate,allenuat , <1 to a petio le at th bas ; lJlvolucrcs solitary, som 'what raceme ·eon the branchc , p e d u ~ c ul ale, man y flow c .r c d , cam pan u 1 a l c, cl c <' p 1 y 5-8 p a r t , d ; ext en or s epa 1 s n '~ r I y o r b 1 c ul a r, d • c p J y co r d at at the bas ; in n r sepals narr.ow, canf1atc h<'low, con tract d abov<·, ~ornewhal di1n.t d and emarg1natc at the summit; stamens muC'h shorter than the sep~ ls. Very rommon in the r gion bctw '<'n the Del orle a1Hl the Gda. Also found by Lieulcn.ant Abert on the upper waters of the Arl~a.nsas. Just as I wa · ·cncl1n.g these notes to the pre. s, I received a ~· 1s1t from Mr. Nultnll, who mform<•d m' that a f-lpccie~ alli d to thiS ~as f~und by Mr. o.ambel, in his late journey to California. lie th1nks. 1ts characters ddfer so much from all the eriogona hitherto de · ·r.. .t bed, that he has ·onstilutecl of it a n 'W genus uncler the name of Ic.. .cvcr...A. A full a~count. of Mr. Gambol's plant , by Mr. Nu~tall, w.tll soon be pubb h d 111 the journal of the academy of Plula<lelphta. Our plant is about a foot high with loos ly panic-ulate branches. ' The heads and flowers are n early as large as tho of E. tomen-tos'ltm .. TlH·.sepa]s arc yellowish, tinged with rose, the three inner ones ddf r w1d ' Jy from th? others; they arc carinate and glandular on th'e back .below the mtddl?, and closely embrace the pistil, the angles of wh1 ·h ~orr ·sponcl wtlh the keels of the epals. II? perfect spcc11nens of several other eriogona occur in the collection. AURURACEA~. Anemopsis Californica, Nutt. !look. tn bot. BeecAey's voy., p. 390, t. 92. Valley of the Gila. 151 [ 7] EUPHORBlACE£. Er mocarpu~ • tig rus, Benth. in bot. of S1dph., JL 53, t. 26 . Pl ains of ~an Diego, California. II end ·and ra. T cxen i::;, /( lotzsclt. 11. muLt Ulorn, 'l'or r. in Frent. lst report. Croton nw.ricaturn, Nutt. Valley of the D ·l ort ). Anoth •r sp •cics of this g('nus, alli(•d to 11. J>rocnrnbens, was founll on the Cordillera· of M' ico, but the mat rials ar scare •ly su fTi cicnt for determi ning it satisfactorily. tillengia . pinulosa, n. sp . Su il'ruticose 'l lca'Vc · rhombic-oval·, rigid, narrowed at t~e base, prom in en tl y .3-ner~ d, m u.rronate 1 y acuminal , dcnlatc-sptnulo. e on the lltargtn; sptkcs a.· tllary and terminal; ~l rile flower scpil ; bract · a uminatc, with a stipitate gland on •ach ide at th' ba · . Abundant in the tlr ert west of the Colorado. tern (apparently) about a span high, with. pr •ading bran che . Leaves an inch or mor' in length, e ~il , n ally margin ·d, with ~ preading spinulose U• •th, glabrou on hoth sides. pike~ numerous; with solitary f rtilc flow •r at th bas' . lcrile How rs about as long as th ' sl'al . Pcrianlh h misphcrical, irregularly lobe<l and undulated. lam •ns 2. Fcrtil' fl ow rs imperfect in our ·pccimcn . Fruit glabrous. Euphorbia h •rnianoid' , Nut!. Banks of the Gila. A pHb s-cent variety of this 'pccic wa:-; found in the de crt w sl of the Colorado. CUPULil• ERJE. Qu r ·u' Emoryi, n. sp . Lcav s <'Oria<' ous, obl ong, qn very short petioles, rcmot ly <lnd repandly tooth d, the erraturcs mucronal<', smooth on both sid s; fruit pedunculate, foiolitary and in pairs, g land ovoid-ob long, mu ·rc1natc; <'UP h mi ·ph ri cal, thC' scale.' appr s ed. Common in th' cl •vated country between the Del Norte an(l th' Gila. This small lcavc<l oak rcscmbl s Q. <tgnfol,ia and Q. 1tndulnta, (To-rT. in Jln n. lye. N. York 2, p. 248, t. 4,) hut is quit eli ·tin t from both. ALJCACEJE. ' alix. ~ veral narrow l •aved willows w re foun<l along the Gila, and in the r gion west of the Colorado, but b ing without fru ctification they cannot be (let rmin ed. One of them is used as food for cattle when th ·r 1 • no g rass. PLATANAC.E£. Platanu ' Mexi canu , Mori an1l pl. nouv. ott rar d'.llmer. t. 26. P. Californicas, B enth. bot. Sulp!t., p. 54. P. racernostt~·, Nutt.? Valley of the Gila. |