150 



Ex. Doc. No. 41 



POLYGONACE^. 



I 



Erioo-onum trichopes, n. sp. Stem scape-like, verticillately and 

 divaric^ately much brauched, glabrous; peduncles capillary; invo- 

 lucre minute, few flowered, glabrous, 4-tooThecl; 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. 

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

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

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

 sions or peduncles s6mewhat secund. Involucre scarcely halt a 

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

 are nearly twice as large as the involucres, sepals concave, ereci 

 spreading. Stamens scarcely exserted. ^ ■ 



E. tomentosum, Michx. Abundant in the region between thecal 

 lev of the Del Norte and the waters of the Gila; the most western 



hitherto found of this species, which is almost the only 



\ station 



M 



e! Aberteanum, n. sp. Annual? Canescently tomentose; stem 

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



at the base; involucres solitary, somewhat racemose on^thebrancne, 

 pedunculate, many flowered, campanulate, ^^eeply o--S-pari , 

 exterior sepals nearly orbicular, deeply cordate at the ^ase; nne 

 sepals narrow, carinate below, contracted above, somewhat diiaie 

 and emarginate at the summit; stamens much shorter than tne 

 pals Very common in the region between the Del JSorte anu 

 Gila. Also found by Lieutenant Abert on the upper waters ot i" 

 Arkansas. Just as I was sending these notes to the press, i recei 

 a visit from "Mr. Nuttall, who informed me that a species ^fl^^". 

 this was found by Mr. Gambel, in his late journey to ^a'^^^JV * 

 ile thinks its characters diff*er so much from all the eriogona m 

 erto described, that he has constituted of it a new gen^sjinder 



of 



e 



Bame of Eucycla. 



Kuttall, will soon be published in the journal of the academy 

 Philadelphia. Our plant is about a foot high, with loosely pau 

 ulate branches. ., ' • f v fomen' 



The heads and flowers are nearly as large as those ot^-^ j. 



eaus ana nowers aie ucaiij ap ^"-ibv. ^^ ...^.-^ - inner 



tosum. The sepals are yellowish, tinged with rose, the "^^ondular 

 ones differ widely from the others; they are carinate and gia» ^^^ 

 on the back below the middle, and closely embrace the pis" j 

 angles of which correspond with the keels of the sepals. ^^^_ 



Imperfect specimens of several other eriogona occur in tne 



lection. 



saururace.^. 



Aneraopsis Californica, Jfutt. Hook, in 

 390, t. 92. Valley of the Gila. 



hot. Beechey'svoy-yP- 



-^ 



