i8 ANALYTICAL KEY 



m. Flowers appearing after the leaves, the latter not persisting 

 through the winter; flowers yellow (white in one species) 

 (^Buttercup). 

 n. Flowers white. White Water Buttercup, 



RANUNCULUS AQUATILIS CAPILLACEUS (p. 59). 

 n. Flowers yellow. 

 u. Plant aquatic. Yellow Water Buttercup, 



RANUNCULUS DELPHINIFOLIUS (p. 59). 

 0. Plant terrestrial. 

 p. Root leaves merely crenate, not divided; flowers small, 

 inconspicuous. RANUNCULUS ABORTIVUS (p. 59). 



p. Leaves conspicuously cleft or divided; flowers commonly 

 large and showy. 

 q. Plant of dry hillsides, flowering in early spring; roots fleshy 

 thickened. RANUNCULUS FASCICULARIS (p. 59). 



q. Low plants o£ ' moist woods, flowering in middle or late 

 spring. 

 r. Petals shorter than the reflexed calyx; carpels with long 

 recurved beak. RANUNCULUS RECURTATUS (p. 59). 

 r. Petals much larger than the spreading calyx; carpels with 

 straightish beak. 



RANUNCULUS SEPTENTRIONALIS (p. 60). 

 q. Introduced plants of fields and waysides; medium-sized 

 to tall, erect plants. 

 r. Base of stem bulb-like; sepals reflexed. 



RANUNCULUS BULBOSUS (p. 60). 

 r. Ease of stem not bulb-like; sepals spreading. 



RANUNCULUS ACRIS (p. 60). 



xa. Old leaves persistent through the winter, the flowers, which 



are white, pink, or. blue, appearing before the new leaves. If 



the three-leaved involucre has been mistaken for a calyx, there 



may be sought here. HEPATICA (p. 61). 



11. Leaf lobes rounded. HEPATICA TRILOBA (p. 61). 



n. Leaf lobes pointed. HEPATICA ACUTILOBA (p. 61). 



I. Pistils with two of more ovules; leaves evergreen, tri-f oliolate ; 



flowers white ; petals club-shaped ; rootstocks bright yellow. 



Goldthread, COPTIS TRIFOLIA (p. 63). 

 j. Flowers perigynous (stamens inserted on ■ the calyx or corolla), 

 k. Leaves simple. 

 1. Stamens more than ten, coherent in a column; styles numerous; 

 ovaries united in a. ring. 



Mallow, MALVA ROTUNDIFOLIA (p. 93). 

 1. Stamens ten or less, not coherent in a. column; styles and carpels 

 two (Saxifrage fatnily). 

 in. Leaves not heart-shaped (Saxifrage^. 

 ji. Corolla white; calyx lobes not reflexed at maturity. 



Early Saxifrage, SAXIFRAGA VIRGINIENSIS (p. 74). 

 II, Corolla greenish; calyx lobes reflexed at maturity. 



Swamp Saxifrage, SAXIFRAGA PENNSYLVANICA (p. 74). 

 m. Leaves heart-shaped. 

 n, Stamens five (Alum root). 

 o. Calyx regular. HEUCHERA AMERICANA (p. 74). 



0. Calyx oblique. HEUCHERA HISPIDA (p. 74). 



