102 plants: ATRIGHTIAN^. V. 



spinosa ; the stems herbaceous from a sufFrutescent base 1 very much branched, not 

 rio-id. Cauline leaves seven or eight lines long and scarcely a line wide, those of the 

 branches successively smaller and more subulate. Involucre of the sterile heads 

 three lines long ; of the fertile, unknown. 



308. Tessaria (Phalacrocline ; recept. nudum, pappi setse fl. hermaph. clavel- 

 latEe) BOREALis : fruticosa, argenteo-incana ; ramis conferte foliosissimis ; foliis lan- 

 ceolatis mucronato-acutatis integerrimis sessilibus ; capitulis subsessilibus paucis 

 corymboso-confertis ; involucro campanulato, squamis exterioribus ovatis tomen- 

 tosis, interioribus linearibus apice scarioso-fimbriatis ; floribus hermaphroditis 6-8. 

 — Tessaria borealis, Torr. %■ Gray, in Emory, Rep. p. 143; Gray, PI. Fendl. 

 p. 75, achiot. Poly pappus sericeus, Nutt. ! PL Gamh. in Jour. Acad. Philad. (n. 

 ser.) 1. p. 178. — Sand-banks on the Eio Grande at Presidio de San Elisario, New 

 Mexico; Oct. (Called Cachimilla.) — This remarkable plant accords sufficiently 

 well with De CandoUe's second section of Tessaria, Ruiz 8f Pav., except that the 

 receptacle is naked, showing scarcely a trace of the villous hairs, and the bristles 

 of the pappus of the hermaphrodite flowers are conspicuously clavellate at the apex. 

 These central flowers are apparently fertile, although the style is undivided, as it 

 likewise is in the genuine Tessarise. The anthers are manifestly caudate at the 

 base, rather more so than in the South American species. The pappus occupies 

 only a single series. The involucre, receptacle, and the habit of the plant are much 

 as in Berthelotia lanceolata, DC, which, moreover, has the anthers nearly as much 

 caudate as those of Tessaria. Moreover, in at least one species of the first section 

 of Tessaria, the pappus of the single hermaphrodite-sterile flower is more or less 

 paleaceous-concreted at the base ; so that these two genera are nearly related, and 

 must stand side by side. 



309. CoNYZA suBDECURRENS, JDC. Prodr. 5. p. 379 ? Gray, PI. Fendl. p. 78. 

 Borders of a pond, in a valley between the Pecos and the Limpia ; Aug. — Perhaps 

 this is an undescribed species ; but the specimens perfectly accord with De Can- 

 doUe's description, except that the " adnate-sessile " base of the leaf is very little de- 

 current, some of the leaves are even pinnatifid-toothed, the stems are hirsute, and 

 the heads, which in Fendler's specimen are barely two lines in diameter, are still 

 smaller (but much more numerous and crowded) in Wright's plant* 



t BoRRicHiA FRUTESCENS, DC. Prodr. 5. p. 489. Between Western Texas and 

 El Paso ; coll. of 1851. A form with broad and toothed leaves, the lower becom- 

 ing green and glabrate. 



•j- EcLiPTA ERECTA, /3. BRACHYPODA, Torr. %■ Gray, Fl. 2. p. 269. Along the Eio 

 Grande, below El Paso ; Oct. 



310. EuPHROSYNE AMBROSi^FOLiA (sp. uov.) : villoso-Mspido ; foliis 2 - 3-pinnati- 

 partitis ; paniculis subfoliosis ; involucri squamis exterioribus 5 ovatis acuminatis 

 maro-ine vix scariosis ; acheniis sub turgidis immarginatis. — Mountains near El Pa- 

 so ; Sept. — A coarse cinereous-hirsute plant, two or three feet high, with the aspect 

 of an Ambrosia. The root is annual, as I suppose is that of E. parthenifolia also. 



* Conyza Altaica, DC, ex spec. Karel. ^- Kiril. 771, is the same as Aster (O.xytripolium, Conyzopsis) 

 angustus, Torr. Sf Gray, the Tripohum angustum, Lindl. ! 



