Order 1.— THE CROWFOOTS. 



147 



8. HEPAT'ICA. Noble Liverwort. 



Calyx (generally called an involucre) of 3 

 entire, ovate, green sepals (or bracts), situated 

 a very little below the corolla. Corolla of 5-9 

 petals, arranged in 2 or three rows. Achenia 

 without tails. — U Pretty little plants blossoming 

 in early spring. Leaves all radical, thick, 

 3-lobed, grceu through the winter. Flowers 

 numerous, one on each scape, blue, roseate, or 

 white. 



Fig. 371. Flower and leaf of II. triloba. 



1 H. trU'oba. Leaf-lobes and sepals obtuse. Scapes hairy, several inches high. 



2 H. acutil'oba. Leaf-lobes and sepals acute. Fls. and scapes like the other. 



4. PvANUN'CULUS. Crowfoot. 



Corolla of 5 roundish, shining petals, each 



Buttercups 



Calyx of 5 ovate sepals 

 with a honeyed scale or pore at the base inside. Stamens 00. Achenia 

 numerous, flattened, crowded in a roundish or oblong head. — A large 

 genus of herbs mostly perennial (U) and with yellow flowers. Leaves di- 

 vided or entire. Juice very acrid. 



§ Petals yellow. Seeds (carpels) rough with prickles. Fls. small. S 1,2 



§ Petals yellow. Seeds smooth and even ) 



§ Petals white (claws yellow). Seeds wrinkled crosswise ) 



a Leaves all undivided. Plants growing in wet places. . . .5-8 



a Leaves more or less divided, not growing under water b 



a Leaves in fine, thread-like divisions, growing under water.... 3, 4 



b Hoffi loaves neitlier divided nor cleft, merely crenate 9, 10 



b Lower leaves 3-cleft but not divided to tlie base. Height l-2f 11-13 



b Leaves all ternately divided and much cleft. c 



c Sepals reflexed in flower. Plants erect 14, 15 



c Sepals spreading in flower, shorter than the petals 16-lS 



1 R. murica'tus. liough-fruitfd G. Plant smooth. Seeds with large, stout, hooked 



beaks. Sepals spreading. Leaves 3-lobed and cleft. South. 



2 R. parviflo'rus. SmalL-flowered C. Plant hairy. Seeds with a very short beak. 



Sepals finally reflexed. Leaves 3-lobed and cleft. South. 

 8 R. aquat^ilis. Water Cnnvfoot. In ponds and rivers. The w/zzV^ petals with a 



cavity at base. Only the flowers above water. Summer. 

 4 R. Pursh'ii. Ptirsk'n Crowfoot. In stagnant water. The yellow petals with 

 i!j leaves, 3-5-partcd. Spring. 



a Roale at base. Floati 



