OF ARTS AND SCIENCES. 71 



IvESiA Webberi. Ilumilis, laxe villosa ; foliis plerisque radicali- 

 bus, lamina circurascriptioue oblonga pedolo filiformi breviore, foliolis 

 approxiinatis quasi-verticilhitis iierape sessilibus 2-5-partitis, segmentis 

 liiiearibus integerrimis rarove bifidis ; scapo decumbente spitliamoeo 

 versus medium foliis 2 o[)positis paucifoliolatis instructo ; cyma 

 confertiflora folioso-bracteata ; pedicellis demum calyce longioribus ; 

 calycis segmentis accessoriis linearihus (rai*o bipartitis) vera baud 

 aequantibus ; petalis flavis oblongis demum lanceolatis basi attenuatis 

 vix iinguiculatis calycem adtequantibus ; staminibus 5 oppositisepalis 

 (nunc 2-3 oppositipetalis additis) ; filamentis demum petala subiE- 

 quantibus subulato-filiformibus ; carpellis 3-4; stylis parum latevalibus. 

 — In ravines, &c.. Sienna and Indian Valleys, California, at elevation 

 of about 5,000 feet, Dr. "Webber, J, G. Lemmon. A neat and very 

 distinct little species, most resembling /. unguiculata in the leaflets ; 

 but these are crowded on an inch or less of the rachis, and the vil- 

 losity is less dense and silky ; also the petals smaller and bright 

 yellow. It was first found near the residence of Dr. Webber, the 

 owner of Webber Lake, a gentleman much interested in natural his- 

 tory, and who has efficiently furthered botanical research in the very 

 interesting district in which he is almost the oldest settler. Wherefore 

 this new species may most appropriately bear his name. 



Mentzelia (Eucnide) urens Parry in herb. Suberecta, ramosa, 

 setis urentibus simplicibus e basi papilliformi cum glochidiatis multi- 

 barbellatis hispidissima ; foliis rotundatis iniB(iualiter subdentatis penni- 

 nerviis, inferioribus petiolatis, summis basi semiamplexicauli sessili- 

 bus ; pedunculis pedicellisque brevibus subcorymbosis ; floribus amplis ; 

 petalis albis obovatis mucrone saepius hispido-peuicillato apiculatis 

 calycis lobos lanceolatos subduplo (stamina innumera longe) superan- 

 tibus ; filamentis basi coalitis. — Eucnide lobata Torr. Bot. Whipp. 

 p. 33, non Gray, PL Lindh. Arizona and Utah : rocky ravines of 



* Folia integerrima, obtusa vel retusa, eglandulosa. 



P. FASCIOULATA. (Em})lectocJadus fasciculatus Torr. Fl. Frem. p. 10, t. 5.) 

 Folia lineari-spathulata, fere sessiJia, obsolete triplinervia. 



P. BiiNUTiFLORA Engelm. in PI. Lindh. Folia oblonga seu elliptica, petio- 

 lata, penninervia, venulosa.: flores minimi. 



* * Folia glanduloso-denticulata, petiolata : flores minimi. 



P. MiCROPHYLLA. (Anujgclalus microphijlla HBK. Nov. Gen. & Sp. 6, p. 245, 

 t. 504.) Mexico. 



§ 3. ? Flores m.njtisculi, petalis sat amplis albis, stylo longo : folia cum calyeis 

 lobis CTfberrime glanduloso-denticulata, vernationo convolutiva'? 



P. GLANDULOSA Hook. Ic. PI. t. 288. 



