137 



138 



on each side: oil tubes 0- 

 Hydrocotyle vcrticillata. 



Hydrocotyle interrupta Muhl, Cat 10. 



Type locality; unknown. Mas-Fla. 

 Tex, Ark. Erroneously (?) reported 

 from CD, SD Co, by Or. 

 Hydrocotyle Americana. 



L, sp pi 1:234 (1753). 



Type locality: "septentrionalis 

 America." Can, Min, XC. Erron- 

 eously (?) reported from LA Co, by 

 Davidson. 

 H ydrocot yle tunbella ta . 



L, sp pi 1:234 (1753). 



Descending- branches of the rt- 

 stock with round tubers; umbels 

 many-fld, simple (rarely slightly pro- 

 liferous); pedicels 4-12 mm long; fr 

 strongly notched, 2 mm long, about 3 

 mm broad, with dorsal ribs promin- 

 ent but obtuse. 



Type locality: America. Mas-Fla. 

 Min-Tex. Cal.. Mex. 

 ITYDROCOTYLE PROLIFERA Kellogg. 



Kellogg, Cal ac pr 1:15. 



Tuberous as in H. umbellata; um- 

 bels proliferous, with 3-5 whorls, each 

 containing 5-20 fls; pedicels 2-6 mm 

 long; fr slightly notched, 2 mm long, 

 somewhat broader, with dorsal ribs 

 prominent and more obtuse than in 

 H. umbellata. 



Type locality: marshes "about San 

 Francisco." Ar, Mex, Tex,? Jamacha, 

 SD Co (Or 442). 

 Hydrocotyle cuneata. 



Coulter and Rose, mon 28. 



"Umbels few-fld, proliferous, some- 

 times slightly branching; pedicels 

 very short; fr 2 mm long, 3-4 mm 

 broad, tapering to the pedicel by a 

 very distinct cuneate base." 



Type locality: Montezuma Well, 

 Ar (D. T. Mac Dougal, 575), Type in 

 USNHb. Western Tex. CD, SD Go 

 (Or, Ap 1889). SF. 

 Hydrocotyle rammculoides. 



L, fls. sup 177 (1781). 



Glabrous, sts floating or creeping in 

 mud. rt-ing at the nodes: Ivs orbicu- 

 lar, 5- or 6-cleft, lobes crenate, 1.5 i 

 broad or less; petioles 3-5 i long; ped 

 1-2 i long, reflexed in fr; pedicels 0.5. 

 }\ long; fr ovoid, 1 li broad or broad- 

 er; ribs obscure. 



Type locality: Mex. Wash, Pa, Fla. 

 Baj (Or?). 



H. natans, Cyrilli, PI Rar Xeap 

 1:20. t 605 (1892). 



SBer (Parish 695); to Oregon; Pa; Fla. 

 Genus BOW^ESIA Ruiz & Pa von. 



Ruiz and Pav, Prod Fl Peruv 44, t 

 34 (1794). 

 Kowlesla septentrionalis. 



Coulter and Rose, mon 31. 



"Weak, 5 cm to 3 or even 6 dm long, 

 dichotomously branching; Ivs th n 

 cordate to reniform, 1.5-3 cm broad, 

 3-5 lobed (lobes entire or toothed), 

 on long, slender petioles; umbels 1-4 

 fld, on short peds, fr about 2 mm 

 long, sessile or nearly so." 



Type locality: near Tucson, Ar 

 Myrtle Buck). Type in USXHb. Tex. 

 Sacramento valley, Cal, to Baj (Or.) 

 tJQWJ.ESIA LOBATA R. & P. 



Type locality: Peru. The Cal 

 plants referred to this sp are B. sep- 

 tentrionalis. 



Genus ERVXGIUM Tpurnefort. 



L, sp pi 1:232 (1753). 



Pers with clustered fibrous rts, 

 often dichotomously branching sts 

 prickly inv and often prickly Ivs; Ivs 

 opp, or the upper sometimes alter- 

 nate, simple, commonly oblanceolate 

 and spinulose-serrate or incised, or the 

 radical, when growing in water, with 

 fistulous petioles and the blade more 

 or less obsolete: fls greenish-w or 

 bluish, condensed in hds, terminal on 

 the branches or on short peds in the 

 forks; bracts spinose, conspicuous; 

 bractlets usually spinose-tipped: ex- 

 lobes persistent on the fr: fr covered 

 with whitish thin scales; ribs obso- 

 lete: oil-tubes 0. 

 F.RYjfolUM ARMATUM Hook. 



Coulter and Rose, bot gaz 13:141 

 (1888). 



Based on E. petiolatum armatum 

 Watson, bot Cal 1:255 (1876). 



Diffusely branching, sts 3-10 i long; 

 ivs broadly oblanceolate, incised or 

 serrate, teeth spinose; bracts and 

 bractlets prominent, broadly lanceo- 

 late, strongly spinose-tipped, with an 

 entire callous margin, sometimes 

 scarious-winged at the very base, 7 

 li long or less; ex-lobes longer than 

 the styles, narrowed at apex into a 

 sharp point or cusp. 



Typ locality: not stated. SD? to 



