VI. PLANTS ■\VRIGHTIAN.E. 55 



expanded limb 2 lines in diameter. Fruit not seen. Style villous below. — The 

 smallest of all the species, both for the leaves and the flowers. 



CowANiA Mexicana, Doh hi Liun. Trans. 14. jo. 574. t. 22; Bcnth. PL ITartw. 

 2). 16. Hills on the Sonoita, near Deserted Rancho, Sonora; Sept. (1058.) — 

 « Shrub 6 to 10 feet high, with short and stout branches." The petals would ap- 

 pear to have been ochroleucous, at most sulphur-colored ; but Mr. Wright assures 

 me that they were ivkite in the living plant, which is also stated of Geum 1 drya- 

 doides, DC. Were the flowers of Don's plant truly yellow 1 



Fallugia paradoxa. Tort: in Emory s Rep. t. 2 ; Gray, PI Wright, p. 68. On 

 the Pecos, Western Texas, in alluvial soil ; June. (1059.) • 



PoTENTiLLA PARADOXA, Nutt. in Torr. %■ Gray, Fl. I. j). 4,37; Gray, PI. Wriyht. 

 p. 68. Sand-bars of the Rio Grande near El Paso and I'rontera ; July. (1060.) 



EuBUS Neo-Mexicanus (sp. nov.) : inermis, fruticosus ; ramis glabellis eglandu- 

 losis ; foliis rotundo-cordatis brevitcr 3 - 5-lobis moUiter pubescentibus, lobis argute 

 serratis subincisis ; stipulis lanceolatis ; pedunculis 1 -2-floris sepalisque apice cau- 

 datis parce glandulosis ; petalis albis orbiculatis calyce longioribus ; carpellis nume- 

 rosis rubris. — Mountain-sides at the copper mines; Aug., in flower; Oct., in fruit. 

 (1061.) — Stems 3-5 feet high, much branched, glabrous; the branchlets pubes- 

 cent, but not glandular nor hispid, slender. Stipules proportionally larger than in 

 R. Nutkanus. Leaves one to 20- inches in diameter, with short and roundish or 

 obtuse lobes, or the terminal lobe acute ; when old, the surface is somewhat plicate 

 and rugose. Peduncles about an inch long. Corolla, when expanded, an inch in 

 diameter. — Manifestly related to R. deliciosus, Torr., which has purple flowers. 



Rosa blanda, Ait., var. /3. Torr. 8c Gray. Valley of the Limpio, especially at 

 Wild Rose Pass, to which it gives the name ; June. 



LYTHRACE^. 



Ammannia Wrightii (sp. nov.) : caule erecto ; foliis lineari-lanceolatis basi auri- 

 culatis imis oblongis basi attenuatis sessilibus ; pedunculis 1 - 5-floris floribus lon- 

 gioribus ; calycis dentibus propriis atque accessoriis brevissimis ; petalis et stamini- 

 bus 4 ; stylo longiusculo. — Margin of pools and mountain streams east of Santa 

 Cruz, and along the San Pedro, Sonora ; Sept. (1062.) — Root annual. Stems 2 

 to 7 inches high. Leaves 6 to 12 lines long, rather obtuse. Peduncles 3 to 5 lines 

 long ; the pedicels 1 to 2 lines long. Bracts linear- subulate. Calyx a line and a 

 half long. Petals orbicular, purple, about the length of the stamens and style. 

 Capsule 2-celled. — The conspicuously pedunculate flowers at once distinguish this 

 from all other North American species. 



A. DENTiFERA (sp. uov.) I humilis ; caule erecto; foliis oblongo-l'.nearibus omni- 

 bus basi attenuatis subsessilibus ; floribus solitariis sessilibus apetdis tctrandris ; 

 calycis dentibus accessoriis subulatis patentibus proprios triangulares conniventes 

 triplo excedentibus. — East of Santa Cruz, Sonora, with the preceding. (1063.) 

 Also at Santa Cruz (a dwarf form, only an inch high). — This species much reseni- 

 bles A. humilis ; but it has prolonged and conspicuous accessory calyx-teeth. The 

 stamens are included and the style very short in all the specimens. 



