OP ARTS AND SCIENCES. Ol 



prhnura lineari-oblongis longiore lobis siiis 2-3-plo longiore ; nuculis 

 mox liorizontalibus tuiuido-coavexis. — Sierra iSTevada, in the north- 

 eastern part of California, Rev. Mr. Burgess, and Sierra County, J. G. 

 Lemnion. 



Pectocarya DC. The radicle is certainly not centrifugal, as 

 stated by Alph. De Candolle, in Prodr. 10, p. 1 and p. 120, foot-notes, 

 but centripetal, as declared by Torrey, in Pac. R. R. Expl. 4, p. 124. 

 Also Cynojlossum pilosnm? Nutt. Gen. 1, p. 114, cannot be Pecto- 

 carya penicillata, which is unknown east of California. It is doubt- 



••- +- Syncarpium ovoideo-pyramidatum : corollae annulus obscurns : thyrsus 

 densior e spicis brevibus. 



E. GLOMEKATUM DC. Bieniie, liispidura, corollae tubo calycetn hispidissi- 

 mum baud superante lobis parum longiore : nuculis dorso tuberculato-rugosis. — 

 Var. iutmile; inferne canescens pube molliore. Saskatchawan and along the 

 higher Rocky Mountains and Sierras. Xuttall collected and gave ilSS. names 

 to some very dwarf and silky-canescent forms, which appear to belong here. — 

 Var. nisPiDissiMUM Torr. : subpetlale ; spicis magis evolutis vel paniculatis ; 

 floribus minoribus. Plains of Upper Missouri to New Mexico. A more distinct 

 variety is 



Var. viRGATUM Porter, Syn. Fl. Colorad. p. 102. (E. virgatum Porter in 

 Hayd. Report, 1870, p. 479.) Undique liispidura ; caule stricto 1-3-pedali ; 

 glomerulis sEepius sessilibus brevissimis foliis fulcrantibus augusto-linearibus 

 plerumque raulto brevioribus in spicam longissimam virgatam foliosam con- 

 gestis. — Colorado Territory, along the eastern base of the Rocky Mountains, 

 and up to 8000 feet ; Parry, E. Hall, Porter, &c. 



E. FDLvocANESCENS. Percune, humile, cjespitosum, interne strigoso- vel 

 subtomentoso-sericeum ; corollae tubo calyce aureo- seu fulvo-hirsutissimo lon- 

 giore lobis suis 2-3-plo longiore ; nuculis granulato-scabris. — E. (/lomemtum 

 var.? fulvocanescens Watson, Bot. King, p. 243. — Rocky Mountains to the Sierra 

 Nevada, at 5-11,000 feet, and south to New Mexico. Intermediate and am- 

 biguous between the var. humile of the preceding and the following. 



E. LEUCOPH^UM A. DC. Perenne e basi ut videtur lignescente, argenteo- 

 sericeum, superne fulvo-hirsutum ; corollas tubo calycem superante lobis 2-3-plo 

 longioribus ; antheris infrafaucialibus ; stylo loni^issimo ; nuculis (lin. 1^-2 

 longis) ovato-triquetris lajvissimis eburneis. — Mijofiotis kuco/i/uea Dough; Hook. 

 1. c. t. 1G3. Interior dry region, from the borders of British Columbia to Oregon, 

 E. California, and ^. Utah. The flowers, said in Hooker's Elora to be white, 

 are certainly sometimes yellow. 



* * * Pterij;/ium. Fere Etih-i/nitzkice, sed nuculis aut tribus ant omnibus ala cre- 

 nata vel pectinatilobata circumdatis : annua, calyce fructifero raodo generis 

 erecto, lobis ovatis. 



E. PTEROCARVusi Torr. Bot. Wilkes, p. 415, t. 13 B ; Wats. Bot. King, p. 

 245 — Var. })eriinat>im, fovma alis fructus pectinato-multifidis. — Dry interior 

 region, Washington Territory to Arizona and the borders of Texas. The var. 

 S. Utah, Parry. 



