42 Spring Flora of Ohio. 



Mag-no'-li-a a-cu-mi-na'-ta L. Cucumber Tree. — Flower oblong bell- 

 shaped, glaucous-green tinged with yellow ; fruit 2-3 in. long; leaves 

 oblong. 



n. 2. Genus LIR-I-O-DEN'-DRON. — Tree, buds flat, pistils flat and 

 ■^ /4 scale-form, long and narrow, cohering into an elongated dry cone. 



Lir-i-o-den'-dron tu-lip-if'-er-a L. Tulip Tree; Yellow Poplar: White 

 Wood. — Corolla bell-shaped; leaves very smooth, appearing as if cut 

 off" abruptly by a broad shallow notch. 



XXVI. Order A-NO-NA -CE-/E. CUSTARD-APPLE FAMILY. — Trees 



or shrubs; sepals 3, petals 6, filaments short; leaves large, alternate. 



1. Genus A-SIM'-INA. — Petals (5, dull purple; stamens in a globu- 

 lar mass; the flowers solitary from the axils of last year's leaves. 



A-sim'-i-na tril'-o-ba (L.) Dunal. Papaw. — Leaves thin, obovate- 

 lanceolate, pointed ; fruit oblong, pulpy, edible. 



XXVII. Order RA-NUN-CU-LA'-CE-/E. CROWFOOT FAMILY. - Plants 



with sepals, stamens and pistils free (except in one species), petals 

 sometimes absent; sepals often petalloid. 



IvCaves alternate or radical, the upper often opposite or whorled a . 

 I,eaves all opposite, sepals -1, styles elongated in fruit (h). 

 a. l,eaves 2, 5-7-lobed ; sepals 3, falling when the solitary flower 



open s Hydrastis. 1 



a. Leaves round and cordate or reniforni : flowers many, yellow, petals 



none Callha. 2 



a. Leaves 5-7-parted : flower 1, large, yellowish or whitish, sepals 5-15. . Trollius. 3 

 a. Leaves 5-11-lobed. flowers corymbose, white i . 

 a. Not as above b" . 



b. Petals with a spot, pit or scale at the base (k . 

 b. Petals not as above or wanting I'c^ . 

 c. Leaves alternate, 2-3-ternately compound, leaflets 2-3-lobed, flowers axil- 

 lary and terminal ; no involucre ; root tuber-bearing Isopvrutii. 4 



c. Leaves trifoliate, radical, evergreen, root bright yellow Coptis. 5 



c. Not as above (d. 



d. Flowers in a single short raceme, sepals caducous, filaments 



white, petals 4-10, small, spatulate leaves 2-o-ternate Acttza. 6 



d. Flowers in long racemes, sepals caducous, filaments white, leaves 



2-3-ternate, petals 1-8, small, on claws, 2-horned at apex. . .Cimicifuga. 7 

 d. Not as above e). 



e. Flowers regular, petals 5, with long spurs, se])als colored Aguilegia. 8 



e. Sepals petal-like, the upper one spurred; petals 4 'rarely 2j, the upper 



pair with long spurs enclosed in the spur of the sepal Delphitiivm. 9 



