TRAUTVETTBRIA. RANUNCULACEiE. 13 



BATRACHIUM. 



oid. Petals none. Pistils numerous, capitate, becoming inflated, 

 4-angled membranaceous achenes. 



T. graodis Nutt. in T. & G. Fl. i, 87. Stem slender, 1-3 feet high : 

 leaves- few, thin, radical long-petioled, cauline short-petioled, all deeply 5- 

 7-lobed with irregularly laciniate-toothed, acuminate lobes ; flowers white : 

 achenes a little more than a line long^ broadly gibbous ^t base, rather abr- 

 uptly beaked by the slender revolute style. Along streams in the Cascade 

 Mountains from California to Brit. Ooluteibia. 



6 BATRACHIUM S. F. Gray Brit. PL ii, 720. ^j 



A'^iiaitic beAs with the submersea leaves if any finely dissected 

 into-eapilla-ry-divisions; -S'e;^als 5, plain. Peta:ls white with yel- 

 low base, and a naked nectariferous spot on the claw of each. A- 

 chenes transversely wrinkled on the sides. Peduncles solitary, 

 (jpposite the leaves. 



B. aquatile Iha Mortier Bull. Bot. See. Belg. ii, 207. Ranuncvlus aqu- 

 atilii L, Glabrous : stems 6-20 inches long : floating leaves round-renifonn, 

 §-© lines in diameter, 3-5-lobed. the lobes coarsely crenate-toothed : pedun- 

 cles thicker thati-the'petiales, 8-10 lines long, spreading or recuyyed in fruit : 

 sepals deciduous: floiwess white, 5-10 lines in diameter: style subulate, 

 npt longer than the ovary, introrsely stigmatic: receptacle hairy: achenes 

 reticulated, short-beaked. In ponds and shallow streams, California to 

 Alaska, Europe and Asia, 



B. trichophylluin Bosch -Prodr. Fl. Bat. 5. Rnnunculus aquatilis var. 

 trichophyllus Gray. Annual: stems coarsely filiform, 2-20 inches long: 

 leaves all submersed, round-reniform in outline, cut into numerous capillary 

 segnients which are 4-10 lines long, short-petioled: peduncles 1-2 inches 

 long, longer than the petioles : flowers 3-5 lines in diameter : style subulate, 

 shbrter than the ovary introrsely stigmatic: receptacle hairy; achenes 

 several, in a close globular head, glabrous obliquely oblong. In ponds and 

 ditches : Oregon and Washington "and across the continent. 



B. Lobbii. Ranunculus Lobbii Gray. Glabrous annual: stems 6-1 2 inch- 

 es long: leaves commonly all floating, 3-9 lines wide, truncate_or :cprdate 

 ,at,base, deejd:y 3^oibed,.middie lobe-^usually <^lft>ticail and entir^,' the latei"-, 

 alones usually oblong and with. a. broad notch in the -apesr; submersed 

 leaves hone or rudimentary: peduncles opposite the upper leaves, thicker 

 than the pstioles 6-8 lines long : sepals a line long, persistent : petals 2 lines 

 long, obovate -oblong : stamens 5-9: style long and filiform, with a small 

 terminal stigma : receptacle glabrous : achenes 4-6, finely rugose, obovate, 

 about a line long, embraced by the persistent calyx. In pools that go 

 dry in summer, Oregon and California. 



7 RANUNCULUS Tourn. Inst. 285. L. Gen. n. 699. 

 Herbs with alternate, entire or variously lobed leaves, and sol- 

 itary or scattered flowers. Sepals 5, plain, commonly colored 

 and reflexed. Petals l-lo, usually broad and conspicuous, with a 

 small pit or spot covered by a scale, on the claw inside. Achenes 

 usually numerous, in a glohose to oblong head, usually flattened, 

 and beaked with the persistent style, not transversely rugose on 

 the sides. Ovule ascending. 



§ i Halodes Gray Proc. Am. Acad, xxi, 366. Mature carpels 

 thin-w^Ued aud utricvilar, compressed, striata with several simple 

 or sparingly branched nerves. Petals yellow with a nectariferous 

 scale iiear the base, deciduous with the sepals. 



