ANALYTICAL KEY 19 



n. Stamens ten. 

 u* Stems with two opposite leaves; petals pinnatifid. 



Bishop's Cap, MITELLA DIPHYLLA (p. 75). 

 u. Stems leafless, or if leafy, leaves not opposite; petals entire. 



False Mitk'ewort, TIARELLA CORDIFOLIA (p. 74) • 

 k. Leaves compound. 

 1. Leaves without stipules; sepals, petals, and ovaries 3. 



False Mermaid, FLOERKEA PROSERPINACOIDES (p. 88). 

 1. Leaves with stipules (.Rose family). 

 in* Flowers yellow iCinquefoil). 

 n. Leaves pinnate, white-tomentose .beneath; perennial, spreading 

 by runners. Silver Weed, POTENTILLA ANSERINA (p. 79). 

 n. Leaves palmate. 

 u. Annual or biennial with stout, erect stems; leaves 3-foliolate. 

 POTENTILLA MONSPELIENSIS (p. 78). 

 u, Perennials with procumbent stems. 

 Pi Leaflets clearly five, white-woolly beneath. 



Silvery Cinquefoil, POTENTILLA ARGENTEA (p. 78). 

 p. Leaflets three, but appearing to be five by the division of 

 the laterals; leaves pubescent, but not white-woolly beneath. 

 Common Cinquefoil, POTENTILLA CANADENSIS (p. 79). 

 m. Flowers white. 

 n. Leaves all radical; propagating by leafless runners that root 

 at the end; achenes exposed (Strawberry). 

 0. Achenes in pits ; leaves moderately veiny. 

 Common Wild Strawberry, FRAGARIA VIRGINIANA (p. 78). 

 V, Achenes superficial; leaves strongly veiny; a woodland plant. 

 Wood Strawberry, FRAGARIA VESCA (p. 78). 

 u. Plants with leafy stems; not propagating by leafless runners; 

 achenes enclosed (Rubus). 

 o. Plants without prickles; leaves delicate, not evergreen. 



Dwarf Raspberry, RTJBTTS TRIFLORTTS (p. 81). 

 0. Plants with prickles; leaves leathery, tending to be evergreen. 



RTTBirS HISPIDUS (p. 81). 

 1. Pistil only one, often more than one-celled, the carpels then being 

 united into a compound pistil. 

 j. Aquatic plant; leaves large, floating; flowers yellow. 



Yellow Pond Lily, NYMPHAEA ADVENA (p. 58). 

 j. Terrestrial plants. 

 k. Plants with colored juice. 

 1. Juice reddish orange; petals' white. 



Bloodroot, SANGTTINARIA CANADENSIS (p. 69). 

 1. Juice . and petals yellow. 



Celandine Poppy, STYLOPHORTTM DIPHYLLTJM (p. 6g). 

 k. Plants with watery juice. 

 L Flowers yellow or yellowish (p. 20). 

 m. Some of the floral parts in fours or sixes (p. 20). 

 n* Sepals, petals, and stamens six. 



Blue Cohosh, CATTLOPHYLLUM THALICTROIDES (p. 67). 

 21. Sepals and petals four; stamens six (Crucifers), 

 0, Plant perennial, with lyrate root leaves, smooth. 



Winter-cress, BARBAREA VULGARIS (p. 72). 

 O. Plant annual, pubescent iMustard), 



