1 1 (5 



coNTKinrrioNs from thk natioxal hkrhauh'm. 



I'knnsyi.vama: I'imoiid MouiiUiins, Moiinif ( (iiiiily, 't'ni ill fimn, ,h\\y Ki, IKT)?; 



wuMc station, llrlllon, July L'ti, lS!t,".. 

 M I \ m;s( IT A : Near Minneaitolis, Smiilhinj, Scjitt'iiilHT 17, IHltl. 



8. Slum heterophyllum (JiTciic. I'ittoiiiii 2: l'>:>. 1,S!>(). 



•■ Roots i'lisit'ofin-tliickcncd below the middle; stem stout, iiotal)ly 

 anjjfuliii' iind llexiioiis. ;5 feet liijfh; l(»\v«',st leiiv«'s witli ii simple limiina 

 which is liithef hfoiidly rhomhic-liiiieeolate. serriite, or hieiniiite-eleft. 

 and 2 to 1(> inches lonj,*', supported on a stout fistulous petiole; the 

 latei- liuliciil .'MolH'd or divided andpassinj^ to the truly ])iiinate, which 

 have t)ut -2 ])iiiis of broadly lanceolate acute .serrate leaflets; the bi'acts 

 of the involiu-re broadly hmceolate, taperinj:^ iit l)oth ends; fruit lA 

 lines lono-. stronji'ly ribbed."' 



Type lociUity. "•iuiu-kish mai'shes near Suisun, California," where. 



it is associated with Clcnta holdtulrrl. 



"It is always aiiuatic, and as cuiiipared witli S. clciitacfoliitni, in which the lowest 

 leaves are the most (liss(H'te(i, reverses tiie order of leaf development." We have 

 not .«eeii this j)iant. 



34. BERULA Iloftm. in Bess. Enum. PI. Volh. 44. 

 Calyx teeth mimite 



1821. 



Kid. ;i'2.— BiTlilii cri'ctu; a, h, ■; 10. 



Fruit Hattened laterally, nearly round, emar- 

 ginate tit base, glabrous. Carpel 

 nearly globo.se, with very slender 

 inconspicuous rib.s, thick corky peri- 

 carp, and no strengthening cells. 

 Stylopodium conical. Oil tiib(>s 

 luunoi'ous and contiguous, closely 

 A surrounding the seed cavity. Seed 

 terete. 



Smooth aquatic perennial, with 

 simply piimate leaves and variously 

 cut leaiiets, usually conspicuous involucre ami involucels of narrow 

 bracts, and white flowers. 



A monotypic gemis l)a.sed on Sluii) erect am lluds. of the north t«Mii- 

 perate regions of l)oth hemispheres. 



1. Berula erecta (Iluds.) Coville, Contr. Nat. Herl). 4: 115. 1893. 



Fig. 32. 

 Slum erectuvi WrnXa. Fl. Angl. 103. 1702. 

 Slum angustifolhmi \j. ^\). VX. ei\. 2. 2:1(572. 17(58. 

 Benda amjmlifoUa Mert. & Koch, Deutsoh. Fl. 2:433. 1826. 



Erect, 1,5 to 9 dm. high or even smaller; leaflets 5 to 9 pairs, lineiiv 

 to oblong or- ovate, serrate to cut-toothed, often laciniately lobed, 

 sometimes crenate, 1 to 7.5 cm, long; umbel many-rayed; rays 5 cm. 

 long or less; pedicels 4 to nun. long; fi-uit scarcely 2 mm. long. 



Type locality not given. 



