FLORA OF THE DISTRICT OF COLUMBIA. 47 



Leaves trifoliolate; a tall shrub; fruit a winged nutlet RTJTACEAE (p. 192) . 



Leaves not punctate. 

 C. Plants woody. 

 Plants climbing. 



Tendrils present VITACEAE (p. 201). 



Tendrils none. 



Stems twining; leaves simple Celastrus (p. 199). 



Stems climbing by rootlets; leaves compound. .Toxicodendron (p. 198). 

 Plants not climbing. 

 Leaves opposite. 

 Leaves compound. 



Leaves pinnate, with 5 or more leaflets Fraxinus (p. 227). 



Leaves 3-foliolate STAPHYLEACEAE (p. 200) . 



Leaves simple. 



Fruit fleshy, indehiscent. 



Flowers in cymes; stone 2-celled CORNACEAE (p. 219). 



Flo •« inpancles; stone 1-celled OLEACEAE (p. 227). 



Fruit dry (aril fleshy in Euonymus). 

 Ovary 2-celled. 

 Fruit a pair of asymmetric samaras; leaves lobed or compound. 



ACERACEAE (p. 200). 

 Fruit a capsule; leaves not lobed.. HYDRANGEACEAE (p. 172). 

 Ovary 4-celled; fruit a 4 (3-5) -celled capsule, the aril red. 



Euonymus (p. 199). 

 Leaves alternate. 

 Pistil a single carpel, forming in fruit a 1-celled pod. 



Corolla papilionaceous FABACEAE (p. 181), 



Corolla not papilionaceous, the odd petal inside the others, nearly 



regular except in Certis CAESALPINIACEAE (p. 180). 



Pistil compound, consisting of more than 1 carpel. 

 Leaves compound. 



Plant prickly: ARALIACEAE (p. 215). 



Plants not prickly. 

 Ovary 2-5-parted, each part becoming in fruit a samara. 



SIMAROUBACEAE (p. 193). 

 Ovary entire; fruit a slightly fleshy drupe. 



ANACARDIACEAE (p. 198). 

 Leaves simple. 

 Stamens more than 10. 

 Fruit a globose nut; cluster of flowers attached to a leaflike bract. 



TILIACEAE (p. 202.) 

 Fruit fleshy; flowers not attached to a leaflike bract. 



Fruit a pome, Beveral-seeded MALACEAE (p. 177). 



Fruit a drupe, 1-seeded AMYGDALACEAE (p. 179). 



Stamens 10 or fewer. 



Stamens 5, opposite the petals RHAMNACEAE (p. 201). 



Stamens not of the same number as the petals, or, if of the same 

 number, alternate with them. 

 Calyx tube adherent to at least the lower part of the ovary. 

 Ovules 1 in each cell; leaves toothed; fruit a capsule. Flowers 



appearing in late autumn Hamamelis (p. 172). 



Ovules Beveral in each cell; leaves lobed; fruit a berry. 



GROSSTJLARIACEAE (p. 172). 



