SPRING FLORA OF MANHATTAN. 17 



M. minimus, L. Annual, with narrow, entire, radical leaves. Dry 

 places, frequent. 



RANUNCULUS, L. 



Sepals and petals 5. Pistils in a head, receptacle not elongating in 

 fruit. 



B. abortiviis, L. Glabrous, branching, 2-5 dm. high. Lower leaves 

 roundish, crenate; upper parted. Petals small, yellow. Low woods, 

 common. 



AQUILEGIA, L. 



Sepals 5, colored. Petals 5, strongly spurred below. Pistils 5, many 

 ovuled. 



A. Canadensis,, L. A perennial with ternately compound leaves and 

 showy, scarlet and yellow flowers. Rocky woods, not common. 

 DELPHINIUM, L. 



Sepals 5, irregular, one of them spurred. Petals 4, two extending 

 back into the spur of the calyx. Flowers in racemes. Leaves palmately 

 parted. Ours with 3 pistils. 



D. Carolinianum, Walt. Racemes wand-like. Flowers light blue or 

 whitish. Lobes of leaves narrowly linear. Prairie, frequent. 



D. tricorne, Michx. Raceme rather short. Stem low. Flowers 

 deeper blue. Lobes of leaves broader and wedge-shaped. Rocky woods, 

 infrequent. 



24. MENISPERMACEAE. 



Woody vines with hypogynous, dioecious flowers. 



MENISPERMUM, L. 

 M. Canadense, L. Leaves roundish, angled, peltate near the edge. 

 Fruit a black drupe with a flat stone. Low woods, common. 



25. PAPAVERACEAE. 



Sepals 2, small. Petals 4 (or more). Stamens 6 (or more). Pistil 

 one. 1-celled. Herbs 



BICUCULLA, Adans. 



Corolla 2-spurred. Stamens united in 2 sets of 3 each. Leaves 

 dissected, all radical. 



jB. Cucullaria, (L.) Millsp. Pinkish flowers in racemes from a 

 granulated bulb. Woods, rare. 



CAPNOIDES, Adans. 



Corolla 1-spurred. Fruit a many-seeded capsule. Stems leafy. 

 Otherwise like Bicucidla. 



C. aureum, var. occidentale, (Engelm.) Flowers small, yellow, 

 racemed. Woods, common. 



26. CRUCIFERAE. 



Sepals 4. Petals 4 (or none). Stamens 6, two being shorter, (or only 

 2). Pistil one, 2-celled by a false partition between the two parietal 

 placentae. Fruit a 2-valved capsule. Herbs with alternate leaves and 

 white or yellow flowers. 



