2. Batrachium divaricatum (Schrank) Wimm. 
Stiff White Water-Crowfoot. 
Ranunculus divaricatus Schrank, Baier. 
Ranunculus circinatus Sibth.; J. B. Smith, Fl. Brit. 2: 596. 1800. 
Ranunculus aquatilis var, divaricatus A. Gray, Man. Ed. 2, 7. 
1856. 
Similar to the preceding species, but the leaves are shorter, 
less than 1/ long, spreading nearly at right angles from the 
stem, rigid when withdrawn from the water and nearly ses- 
sile; there appear to be no constant differences in flower or 
fruit. 
In ponds and slow streams, Ontario, New England, northern 
New Jersey and Pennsylvania, and west 
tending south in the Rocky Mountains to Arizona. Also in Eu- 
Tope. Summer. 
RANUNCULACEAE. [Vor. II. 
1. Batrachium trichophyllum (Chaix) 
Bossch. White Water-Crowfoot. 
(Fig. 1626.) 
Ranunculus trichophyllus Chaix in Vill. Hist. Pl. 
Dauph, 1: 335. 1786. 
Batrachium trichophyllum Bossch, Prodr. Fl. Bat. 5. 1850, 
Ranunculus aquatilis var. trichophyllus A, Gray, Man. 
Ed. 5, 40. 1867. 
Ranunculus aquatilis var. caespitosus DC. Prodr. 1: 26. 
1824. 
Submerged; stems branching, usually 1° long or 
more. Leaves petioled, 1/-2’ long, flaccid and col- 
lapsing when withdrawn from the water, repeatedly 
forked into capillary divisions; flowers white, 6’’-9’’ 
broad, on stout peduncles 1/—2’ long, blooming at the 
surface of the water; head of fruit globose, 2’ broad; 
receptacle hairy; achenes apiculate but beakless. 
In ponds and streams, Nova Scotia to British Colum- 
bia, south to North Carolina and California. Also in 
Europe and Asia. A variable species. The so-called 
var. caespilosus is a small mud form. June-Sept. 
(Fig. 1627.) 
Fl. 2: 104. 1789. 
to the Pacific Coast, ex- 
3. Batrachium hederaceum (L.) S. F. 
Gray. Ivy-leaved Crowfoot. 
(Fig. 1628.) 
Ranunculus hederaceus I. Sp. Pl. 556. 1753. 
Batrachium hederaceum §. F. Gray, Nat. Arr. Brit. Pl. 
23721. “1825. 
Semi-aquatic, rooting extensively at the joints, 
branching, entirely glabrous. Leaves floating, or 
spreading on the mud, semi-circular or broadly 
ovate in outline, 3-5 lobed, 3’/-6’’ long, 5//-10’’ 
broad, the lobes obtuse; flowérs white, 2//-3// 
broad; head of fruit globose, 2’’ wide; achenes 
rugose, minutely beaked. 
In ponds and pools, Newfoundland and southeastern: 
Virginia, Naturalized from Europe. June-Aug. 
