COULTKR AND ROSK — NOKTir AMKRICAN UMHKLLIFKRAK. Il7 



t), IHTjT; 



lotahly 

 1iiiniii;i 

 »>-clcft. 

 U-, the 

 , which 

 s bnu'ts 

 ruit 1.^ 



le lowf^t 

 We have 



1. 



I, emai- 



Oarpt'l 



slender 



ky pei'- 



g cells. 



I tulx's 



close Iv 



Seed 



ill, with 

 liirioiislv 

 narrow 



Irth teni- 



Il893. 

 IFig. 32. 



l-s, linear 

 lobed, 

 lys 5 cm. 

 ])ng. 



Ill swamps and streams. Ontario to Texas, westward to Hritish 



(\)lunil)ia and California, and (ixtending into Mexico. 



Siiii'liiii'iis exdvi ined: 

 Illinois: F. IWk. 



Minnesota: Fort Siu'lliiifr, Mi'urns, St'j)t('iiilM'r \',l, 1891. 

 SoiTii Dakota: lUaek Hills, in'ur Fort Aleadf, FonroDil 141, Aiimist .'i, 1H87; Big 



Stone, (iruiit Cininty, W'illitniis, Augast 2'i, 1S92; Black Hill,-, Hot Sjirinp^, 



Rijilherg Tl'l, August 10, lSt)2. 

 Nkhkaska: Paddock, r/,;;(c;,^^ 2K02, .Tuly 2S», 18»;}. 

 Kansas: RenoCounty, rv/r/W(>M294, .Tiily 10, 1891; Rockport, linrlhitlouitir, \\\)i\\si 



W, 1891. 

 Texas: Wriylit 1105, in 1851-52; Afij. lioimd. Siirr.; San Antonio, Hartinl. 

 New Mexico: Silver City, Snow, August; Whit«' Mountains, Lincoln County, 



W'onUm 25(5, .Tuly .'{l, 1897. 

 ('oi.oUAi)o: San Luis Valley, ]\olfT.i'2, September, 187.'5; near Denver, Lillrrnutn 



217, August 20, 1884; near Fort (Jol I ins, ro»,v;,, .Tuly-August, 189:i and 1895. 

 \Vvo.MiN(i : Yellowtftone J'ark, Foriraoil, August 'A, 1881; Utile (Joose Creek, 



.1. AVAs(*/( 2275, .Tuly 11, 189(); Badger, .1. AV/.w// 27()*;, August 27, 189H. 

 ^Iontana: (i real Fa!'.'*, Williiinix UCi, September 27, 1885. 

 T'taii: Near (Jlenwood, IK'/rf/ .'{OH, July Ji, 1875; Rabbit Valley, UWr*/ .595, August 



17, 1875; Salt Lake City, 7'wc//({(!2, August 11, 1887; Brovo. .A-zhx 5(;i8((..Tuly 



11, !S94. 

 Aki/.ona: Santa Cruz River, iSmarl '.i~'.'t, in 18H7; J'uliun; in 18()9; Bakers Butte, 



Toiniini 189, .Inly 19, 1892; F^.rt Apache, Shnttlnrorth, .lune 29. 

 Nevada: Humboldt Bass, Watxan 444, September, 1808. 

 Camkoknia : Near F'ort Tejon, Xiintnx <// IV.sc// .'57, in 1857-5S; .sim*' station, Jiolh- 



rork 262, August, 1875; near Los Angeles, 7'n/r// 89(5, July (5, 1887; Inyo 



County, Curillf ii- Fnnxtoii 271, F>l)ruary 7, 1891. 

 OKKtioN: Otis Creek, Malheur County, LrihiTij 2341, June 20, 189t>; Wallowa 



Valley, fhwrk 2081, August 19, 1898. 

 Washington: Coulee City and Wilbur, Ilcnderxiiu 2525, July 11, 1892. 

 I'.KiTisH CoLUMiJiA : Kauiloops, Mdcittu) 20, June 17, 1889. 



35. PTILIMNIUM liaf. Am. Month. 4: V,)'2. ISU). 

 hixrojdnim DC. Coll. Mem. 5: :i8. 1829. 



( Illy X teeth small or somewhat prominent. Fruit flattened laterally, 

 ovate or ol)long, glal)roiis. Carpel with dor.sal and intermediate ribs 

 rilil'onn to broad and obtuse; the laterals very 

 tiiick and cork}', closely contiguous to those 

 of the other carpel, forming a dilated obtuse 

 or acute corky band (except in /*. intttnllH): 

 all sul>tended by .strengthening cells. Stylo- 

 IXKliuni conical and prominent, with very 

 short to somewhat elongated styles. Oil 

 tul)es solitary in the intervals, 2 on the com- 

 iiiisMinil side. Seed nearly terete (somewhat sulcate beneath the oil 

 ti:t»es) or with flattish face. 



Smooth branching annuals, with tinely dls.sected leaves (filiform or 

 laiKt'ohite divisions), involucre of foliaceous bracts, involucclsof prom- 

 inent or minute bractlets, and white flowers. 



Fu!. 3.3.— Ptilimiiium capil- 

 liieeuni: <i. :■; S; h, x 10. 



