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Show [ 243] 90 CONVOLVULACE1E. Cafyslcgia M'pi twt ( R. Br.) Fork of the Platte. .July 2. Ipomcra leplophylla, n. p. Stems branching from the base, pro ... tratr, '1;labrous. angular , lea.v":; laoccolate-linear, very acute, entire, attenuate at the l.Ja c into a petiole; peduncle~ 1-3-flowercJ; cpa! roundish-ov:nc, obtu c with a minute mucro.-Fork. of the Platte to Laramtrrivcr, July 4-Sept. 3. Jrnp rfcct specimens of thi plant were collected about the ourccs or the Canadian, by Dr. J::unc. , in Long';; expedition, but they were not descnbcd in my arcounl of hi plant.. The root, according to Dr. James, is annual, produring numerous thick pro~trate, but not twining, !>terns, which arc two feet or more in length. The leaves arc from two to fom mche. long, acute at each end, strongly veined and omewhat corinceou . Pt·duncle~ an inch or more in length, those towards the extremity of the branche only 1-tlowere<. l; the lower ones bearing 2-3, and ometime 4, flowers, which are nearly the izr or those of Cal)stcgia scpium, and of a purpli h color. Sepals appre cd, about fiyc lmc~ lonO'. Corolla campanulatc-funnel form, the tube much longer than the calyx. tameo' inserted ncar the base of the corolla; filament villou at the ba e; anther<; oblong-linear, large. tyle a long as the '-lamf'ns; ·tigma 2-lobcJ; the lobe~ capitate. 0Yary 2-ccllcd, wtth two ovule in each cell. SOLAN A CEll-:. yctc1iwn lutcum (Donn cat.) South fork of the Platte. July 4 Physalis pttbescnts (Willd ) Upper North fork of the Platte. July 23 P. pvmilc' ( :\1' utt.) With the preceding. GENTIAN ACEA:. Gmliana arctophilCI {3 den.,iflora (Griscb. ? in Hook. fl. Bor.-Am. 2. p. 61.) Sweet Water or th . Platte. Aug. 4. G. (I.Dinis (G ri~cb.) North fork of the Platte. Sept. 9. C. P~teunw11anlhr ( Linn. ) Laramie river to Little Sandy creek in the mountains. July 12- Aug .. C. Fremontii, n. p. Stem branched at the base; brancltc 1-flowcred; leave o,·ate, cu pidate,ca•tilaginou~ on the margin, erect; corolla funnel-form ; plir·, mall, slightly 2-toothed; cap'-ult• ovate, at length entirely ex crtcd on _1ts tltick stipc.-\Vind Hiver mountain .-Annual Branch~ . e\·cral, 2-3 inche long, of nearly equal length. Leave about three line!> lon6, with a trong whiti h cartilaginou border, horter than the internode . Flower a large J. • those of G. pro trnta, pcntnmcrou . Calyx t'vvo-third the length of the corolla; the teeth abou' one-third the length of the tube. Pliere of the corolla. carccly one-third as long a!' the lanceol::llc lobes. Stamens included; anther. oblong, . omcwhat cordate at the ba e. Cap ule in matt.rity, and after dchi ·ccncc (in \'vhich state all our specimen were collected), exerted qurtr· beyond the corolla, and, with 1ts long tipc, resembling a tyle with a large bilamellate tr~ma. None of tlre capsules contained any seed. . This specie i nearly related to G. ;n·o.trala (flaenk.) and G. hwnilis (Stcv.), but the former has . patulatc obtuse recurved leave. , and the latter entire plicx, which are nearly the length of the corolla. In G. humilis, and rn... the allied G. sqtW1Tosa (Lcd('b.) the cap ule i. cxscrted after tli charO'in ()' the eed .... ...:'trertia pn·e1mis, {3 obtu a ( IIook.) From Laramie river to the Big Butte . ,F'ra.se1·a specios<t, (Hook.) Defdc. of the Wind River mountains. Au;. 13-14. Li.~ianllms RusseliM1HS ( Hook. ) Lower Platte to the Forks. July-Sept. APOCYN ACEiF.. .,1pocyn.1tm cannabinum (Linn.) On the Platte. ASCLEPIADACE1E. • llsclepias speciosa (Torr., in ann. Lye. N. York, 2. p. 218.-A. Oouglasti, Hook. ft. Ror.-Am. 2 P· 53. t. 142.) Forks of the Platte. July 2. Colleeloed also by Mr. Nteollet m his North- 91 [ 24,3] we. tern expedition. Hooker's pbnt dillcrs in noes entia! character from my A. ·pecw , collected by Dr. .lamer, in Lon()''s first expedition. f}. vcl'licillata (Lin n.) ~mall var ety. 'Vith the preceding. .'/. lttbrrosrt (Linn.) Kansas ri vrr. J unc 19. Jlnanthn·i:r: 1•iridis (Nutt.) Big Blue river of the I\ ansa. June 20. .fJcerates l<ntgifolin (Ell.) Polyotus longifolia. (Nutt.) With the precedmrr. .f). angttstijiilitts. l'olyotus angu• tifolius. (Nutt.) With the preceding. OLEACE/F:. Fra:r:in1ts plalycmpa (Michx.) Leave only. Lower Platte. PLANTAG I~ ACEiF:. Plantago e1·ioporla (Torr. in ann. Lye. N. York, 2, p. 237. ) Mouth of the Sweet Water. July 3l. P. gnnphrtloidt·s (Nutt.) Little Blue ri\·er of the Kam-as. June 24. Cl fi~NOrODIACElF. . Chc1topodinm ::oslrr~/(>li wn ( Tiook.) Pbtt ? C . .lllbwn (Linn.) North fork of the Platte. .July 12. Olionc cane.wns (Mocq. Chcnop p. 74 .) Atriplcx cancscen. (Nutt.) Cppcr north for of the Platt . July 26. Cyclolomaplalyphylla (Mocq. I. c. p. 18.) Kochia dcntata, (Willd.) North fork of the P lat~ - Sept. 4. Suerlrt mariti111a (Mocq. l. c. p. 127.) ·with th prccecding. Em·otin lmwln ( Mocq. 1. c. p. 81.) Diotis lanata, (Pur h ) . Red Butte to the mountain . Au; - 18 -25. Premonlin, n. gen. Flowers diclinous, monmcious &? dioicou~, heteromorpho:Js. Starn. Fl. P terminal amcnt . Scales excentri cally pcltat ', on a ~bort !-ltipc, angular, omcwhat cu pidate upward. 'tamcns 2-3-4 under carh scale, naked, · 'S ile ; anthers oblong. PU. Fl. solitary, axillary. Pcrigonium closely adhering to the lower half of the ovary, the bord~t· entire, nearly obsolete, but in fruit enlarging in to a broad horizontal angular and undulatc wing. Ovary ovate; style~ thick, divaricate; tigmas linear. Fruit a utricle, the low£'· two-thirds covered with th indurated calyx, compressed. Seed \ertical; integument dot.ble. Embryo flat- piral (2-3 turns) green; radicle inferior; albumen none. F. vmniwlaris. Bati ? vcrmicularis, ( Ilook.) Fl. Dor. Amer. 2. p. 12 . ppcr north fo1k of the Platte, ncar the mouth o( the 'wcct \Vater. July 30. A low, glabrous, rliffuscly branched ~hrub, clothed with a whitbh baric. Leave alternat , linear, flc ·hy and almo L semiterctc, 6-12linc long and 1-2 Jines wide. Staminate ament about three-fomth · of an inch long, cylindrical, at ftrst dense, ~nd compo cd of closely compncted angular calc·, covering naked anthers. Anthers very deciduous. F'crtile flowers in the axil of the ramr::d leaves. Calyx closely adherent, and at ftrst with only an obscure bord r or limb, but at length forming a wing 3-4 lines in diameter, resembling that of Sal. ola. Thi rct11arkablt' plant, which I d dicate to Lieutenant Fr mont, wa ftr t collect d by Dr. James about tht' sources of the Canadian , ( in Long's expedition) but it wa · omitted in my account of his plan~~ published in the Annals of the Lyceum of Natural IIi ·tory. lt i undoubtedly the Rati ' \ Crmiculari of Hooker, (1. c.) collected on the barren ground of the Oregon river by the late Mr. Douglas, who found it with only the staminate flower. . We haYc it now from a third loealiiy, ·o that the plant must be wid ly diffu ed in the bancn regions towards th~ Rocky Mountains. lt belong to the ·11b-ordcr Spirolobere of Meyer and Mocquin, but can hardly be referred to either the tribe Sumdin~ or to Sal olro, dificring from both in it~ diclrnous heteromorphous flower , and al o from the latter m it flat-spiral, not cochlcate embryo . NYCTAGJN ACEJE . xybaph11s nyclCiginen (Torr. in James' Rocky mountain plants. ~=Calymenia nyctagmca• (Nutt.) Kansas river, June 20. |