's in !i 

 itfn:i 



(' from 



s'('\!l<l'.l. 



lilt li:is a 

 atlff lia- 



ihll ijtlijii!'. 



iirriiiiiil"'-- 

 I' Id. .••'. 



Ics. Nvilli 

 liilcraU 



IC llHI'll 



lie IoIm- 



Cl'Cllilll' 



sliol'tcr 



t'olMllillL:' 



<()t' 0\!llt' 



ly to thf 



nil. loii'i'. 



ic stcriK' 



conuni-- 



ultitmlt' 

 ; typ*" ill 



|th loii'jt'i' 

 )ii lonut'V 



hv •/' 



ron/l'KU AND U<»SK — NOUTII AMIMUCAN I'M MKI-MKEKA K. l!S7 

 :;. Rhysopterus corrugatus (Jones) ('. i<; U. 



< 'ifiii<>iili Ills fiiniii/iihi.i Aitwt'y, Aim. N;iI. 17: '.•7i>. ISSII. 



L('ii\('s l>('('omin<i' 7 <'iii. lonji'. with a inoir ohlono' outline, and nioro 

 ilisseete(l: primary divisions or leaflets ."i. liasal pair the laret-st. o\ate. 

 pinnately "> to .^-i-let't. the ultimate divisions clet't and sharply toothed: 

 iiniltels usually solitary and on lone-er pe(luneles. with involueels of 

 i.\ate l)ractlets often cleft at apex into :! loiiii- lineai' loltes. 



'lype locality, ""liose ('re(d<." near lluniltoldt Lake. Nevada: col- 

 lected hy -/o/ns. no. ;;s,s»;. dune 17, l.SS::i; type in llerh. doni's. dupli- 

 cate in I'. S. Nat. Herb. 



Only known from the ty))e locality. 



S/ii iiiiii'iin I .I'linniii il : 



Ni:v \i> \ : 'I'.v|ic >|M'(iiiiriis us citcii under t>'|«' Ideality. 



54. PSEUDOCYMOPTERUS ( '. .^ \{. Kev. N. .Vm. rmhell. -jo and 74. 



isss. 



Calyx teeth evident. Fruit ohloiiii. ultihrous. Carpel with very 

 jirominent iuid twute (sometimes narrowly w iiieed) doi-.^jil ;iiid interme- 

 fjiate ribs, and rsitlier 

 l>road iind thiekish liitertii 

 winu's (sometiiiios not 

 iiiiich mor«' ])rominent 

 lliati thedoi'sidsiind inter- 

 iiie(liiites), which tire dis- 

 tinct from those of tho 

 (itiier carpel. Stylopodi- 

 iiin wantine-. Oil tul)es I 

 to 4 ill the intervals, -1 to 

 Son the commi.ssund side. 

 Seed more or less Hat- 



teiied. with plane faee(e.X- ^^ r,6.-rsP„<lo,.yme,,„.rus nw.nta.u.s: a.xiV. h. x8. 



eept ill /'. hlj)!)matil.-<). 



Ciude.scent or tu-aulescent |)laiits, with hipinnate leaves, no iinolucrc 

 (\('ry i-iir(dy ti hrtict or two). involuc(ds of mostly linear tirtictlet.s. and 

 Miriously colored tlowei's. 



TvjM" species, Tliaxphnn^?) iiionidinnii (rrtiy. IM. Feiidl. .">7. lS4it. 



.\ efouj) of 4 speeit>s. ludon^iny chieHy to the Rocky Mountiiins 

 ;iiid extendinj"' from New Mexico and Arizona to Monttina tuul eastern 



< 'reoon. 



< aiilesceiit and slender; tlowers yellow or purple 1. /'• tuduUnnia. 



A' aniesceiit ami eespitose; tlowt'rs white or yellow. 



lA'avesoii iontr petioles and with piin<rently acute h-eginents 2. 1'. animtus. 



Leaves on short petioles, very i)ale or fjclauoous, not so pungent. 



Peduncles !{ to 5 em. long :5. /'. hcndrn^oni. 



1 Vduneli's 10 to 20 cm. long 4. /'. bipinnatm. 



