COULTKU ANI) KOSK — NoliTH AMKRH'AN I'MHKLMt KKAK. 



2W 



lint Hf to 



lu'tiinos 

 sliohtlv 



Li> Worth, 



in, Ih'iirii, 

 K), 1804. 



Fi(i. 1. 

 iiiu'lunjj;-; 

 )eriii*; to 



nviird to 



uiu", 1K.S2; 

 Muclhuuftl, 



lis Ohispo, 

 Vpril.lKHH; 

 l^rlli^t, 185)8. 



fusiform 

 ■< cnMiiite, 

 nit about 

 hI soc'tion 



(i/ni. 

 uouiitains 



i8Jtri. 



11.1 Mitford, 



HiiiiDK Imi,am): IVovidi'iict", IT. IT. liitilfii, in 1874. 



S\:\\ .Ikuskv: Fort Lee, \'<t,i Sickle, July 12, 1804. 



DisruicT OK CoiirMiii.v: Near Wasliin^'toii, Vukcij, Se|itciiilicr •_'(), 188'); ncjir 



Takoiiia, I'olhuil Al\, July 10, I80r). 

 N'oiiTii Cahoi.ina: IJtiiicoiiihf County, Jlllliiiurr Jlirh. 4()0:5*», .Iiiiit' 27, 1808. 

 Ni:\v Yohk: < ),«\wj.'o County, Shililon, August !.'{, 18H;{; near Ithaca, <'<>rilli\ hi 



188") and U<8(); near Itliaca, \Vi> )/ini>l, .]u\y ^), I8O:?. 

 \Vi.s(()nsin: Ilock Creek, T'/.v*//, in 1872; St. Croix Fail.s, >'/« /</';//, Septoinln'r, 1893. 



{). Hydrocotyle ranunculoides L. f. Supj)!. 177. 17S1. 



//. //u/-(//.sCyrilli. Pi. I{ar. Neap. 1: 20. pi. tiO."). 1802. 



Floatiii*^ Of ('i('('|)iii<,r iti mud: l<'iivo.s thick«M'. round roniform, 8 to 

 7 fit' ft. with crciiato lohos; pcdunclo.s, iJ.r> to 7.5 cm. lonjjf. rcHcxed in 

 fruit; (•ai)ita(t' uiuhol 5 to lO-tloworod; fruit, 2 to 'A nun, broad, with 

 rather otjscurcrih.s, and no lay( r of ,stronj^thonin«^ cells about the .seed 

 cavity: .seed section ohh)no'. 



Type locality, "Mexico." 



Ei'stcrn remisylvaiiia to Florida, thence westward to Texas, Cali- 

 fornia, and Washino'ton. 



S/ii (•li»rii.'< I'.auiiniid: 



I'k.vnsylvania: Near \Vrij.'lit.«vill(', York County, Herd, ,]n\y 7, 1800. 



DisTKKT OF Coi.r.MiiiA: Near Henninjrs lirid^'c, la.sc//, in 1874; iK-tweon (ieorge- 



town and Ciiaiii l?ridj.'e, I'nxiif d- t'orll/,; .July I"), 1888. 

 .Mahyi.an-d: (Jreat Kails of the rotoinac, /W/^nv/, .Inly 4, 180(). 

 Vikoinia: near .Mexandria, />''w< A- (hrill,', .May 24, 1800; Four Mile Kun, Sirric, 



.Inly :{1, 180ti. 

 Florida: Near Apalaehieola, ChW/'.s.s r)SS8, .June 12, 1807; ChdpVKni. 

 Nkw .Mkxico: Wright 1102, in 18.')1. 

 Cai.ikokm a: Near San I'^rancisco, W'ilh's Plr/n'il. 14fiO; sainestation, IV/.ic// 220, .Inly, 



1880; IjCiiiiiidii (>;>, in ISSO; Los Angeles County, JIasse, August 2(), 1890; San 



Bernardino County, I'dv- 



ish, .June 20, 1801; near 



San .lo.se, ./c/ixidi, May 28, 



1890; near San Francisco, 



Alive K<iKlwi)ntl, .July, 180H. 

 Okkcon: Near Portland, Ilrn- 



(levxoii ;{()8, in ISSIi. 

 WAsniN(iToN: Near Seattle, 



I'iper (WO, Septeniher 8, 



1889. 



2. CENTELLA L. IM. Rar. 

 Afr. 2S. 17(;(»: .Vnioen. 

 Acad. 6: ll'2. 17»;4. 



Calyx teeth ol)solete. 

 Fruit orbicular to reiiiform, stron<j'ly Hattened latcM-ally. Carpel with 

 5 primary ril)s and prominent secondary ril)s and reticulations, the 

 dorsal maroinal and filitorm; an oil-l)earinjj layer beneath the epider- 

 mis, occasionally containin<»' small oil tubes, and a thick layer of 

 strenj>thenin<j cells surroundinij the seed cavity. 



Peremiial herbs, growing in or near the water, with .slender creep- 



Fio. 2. — Ceiitollii asiiiticii: a, x S; b, x 10. 



