151 [7] 



POLYGONACEiE. 



Eriogonum trichopes, n. sp. Stem scape-like, verticillately and 

 divaricately much branched, glabrous; peduncles capillary; invo- 

 lucre minute, few-flowered, glabrous, 4-toothed; the teeth nearly 

 equal, obtuse, erect; sepals ovate, acute, nearly equal, very hairy. 

 Eastern slope of the Cordilleras of California. Our specimens of 

 this remarkable species are imperfect, the leaves being wanting. 

 They probably grow in a radical cluster. The flowering stems are 

 a foot or more high, with the primary and secondary branches ver- 

 ticillate; the branchlets are bi-trichotomous, and the ultimate divi- 

 sions or peduncles somewhat secund. Involucre scarcely half a 

 line in length, 5 — 6 flowered, and only 4-toothed. The flowers are 

 nearly twice as large as the involucres, sepals, concave, erect — 

 spreading. Stamens scarcely exserted. 



E. tomentosum, Michx. Abundant in the region between the val- 

 ley of the Dei Norte and the waters of the Gila; the most western 

 station hitherto found of this species, which is almost the only 

 Eriogonum known east of the Mississippi. 



E. Abertianum, n. sp. Annual? Canescently tomentose; stem 

 dichotomous above; leaves oblong-lanceolate, attenuated to a pe- 

 tiole at the base; involucres sofitary, somewhat racemose on the 

 branches, pedunculate, many flowered, campanulate, deeply 5 — 8- 

 parted; exterior sepals nearly orbicular, deeply cordate at the base; 

 inner sepals narrow, carinate below, contracted above, somewhat 

 dilated and emarginate at the summit; stamens much shorter than 

 the sepals.. Very common in the region between the Del Norte and 

 the Gila. Also found by Lieut. Abert on the upper waters of the 

 Arkansas. Just as I was sending these notes to the press, I re- 

 ceived a visit from Mr. Nuttall, who informed me that a species 

 allied to this was found by Mr. Gambel, in his late journey to Cal- 

 ifornia. He thinks its characters differ so much from all the Eri- 

 ogono hitherto described, that he has constituted of it a new genus 

 under the name of Eucycla. A full account of Mr. Gambel's 

 plants, by Mr. Nuttall, will soon be published in the journal of the 

 academy of Philadelphia. Our plant is about a foot high, with 

 loosely paniculate branches. The heads and flowers are nearly as 

 large as those of E. tomentosum. The sepals are yellowish, tinged 

 with rose, the three inner ones differ widely from the others; they 

 are carinate and glandular on the back below the middle, and 

 closely embrace the pistil, the angles of which correspond with the 

 keels of the sepals. 



Imperfect specimens of several %other Eriogona occur in the col- 

 lection. 



SAURURACE^. 



Anemopsis Californica, JYutt. Hook, in hot. Beechei/s Voy.,p. 

 390, t. 92. Valley of the Gila. 



