ORDER XXVIII. ZANTHOXYLACE^. 253 



Genus I.— KALLSTRCE'MIA. Scop. 10—1. 

 (From an obscure botanist.) 



1. K MAx'iMA, (T. & G.) Ste7ns procumbent, diffuse, trailing, ]>ul)0!i- 

 cent. Leaves j)innate, generally with 3, sometimes 4 pairs of leaflets 

 Leaflets oblong, mucronate, slightly falcate, pubescent beneath, the ter- 

 minal one largest. Flowers on solitary, axillary, l-flowered peduncles. 

 Calyx persistent. Petals obovate, longer than the calyx, withering. 

 Cocci gibbous below, tubercled. — Yellow. If. June — Sept. Intro- 

 duced from the West Indies. Savannah. 1 — 2 feet IoHj^. 



Order XXVIIL— ZANTHOXYLA'CE^. Ad. Juss. 



Flowers dioecious or perfect, regular. Sepals 3 — V, cohering 

 at the base. Petals as many as the sepals or none, aestivation 

 twisted- con vol lite. Stamens as many or twice as many as the 

 peteils. Filament distinct. Anthers introrse. Ovaries as many 

 as the sepals, or sometimes fewer, distinct or united. Fruit of 

 several drupes, or baccate or membranaceous, 2 — 5-cel!ed, sar- 

 cocarp flesh}^ separable from the endocarp. Seeds anatropous, 

 solitary or in pairs, pendulous. Embryo lying within fleshy 

 albumen. Trees or shrubs, usually with prickles. 



Genus I.— ZAXTHOX'YLUM. L. 20—5. 

 (From the Greek xanthos, yellow, and xulon, wood.) 



DicECious. SejMls usually 5, small, united at the base. 

 Corolla none. Stamens 3, 5, 6, or 8, tliose of the pistillate 

 flowers rudimentary. Pistillate flowers sometimes with a co- 

 rolla. Styles 2, 3, or 5, and ovaries as many. Carpels crusta- 

 ceous in fruit, 2-valved, 1 — 2-seeded. Seeds black, shining, and 

 globose when solitary, hemispherical when in pairs. 



1. Z. America'num, ("Will.) (Z. Clava, Jlcrcidis of Linn) A .«hrub, 

 with the branches armed with strong stipular prickles. Leaves pinnate. 

 Leaflets ovate, acuminate, nearly sessile, more or less pubescent. Flow- 

 ers in axillary umbels, greenish. — t, _ April — May. 



Prickly-ash. Toothache-bush. 



2. Z, Carolinia'num, (Lam.) (Z. tricarpium of Ell.) A small tree, 

 with numerous expanding branches, baik with prickles. Leaves jnii- 

 nate, alternate ; leaflets obliquely lanceolate, crenate, serrulate, gla- 

 brous, shining above. Flowers in terminal panicles. Sepals minute. 

 Petals long-oval, longer than the sepals. Stamens usually 5, but varia- 

 ble. Styles 2 — 3, incurved. Capsule 1-secdci}. Leaves and bark very 

 pungent to the taste. — June. On the coast of Car., Geo., and Floridju 

 12—20 feet. J'rickly-ash. 



Genus IL— PTE'LEA L. 4—1. 

 (From the Greek ptelea, the Greek name for Elm.) 



Dkecious. Sepals 4, united at the base. Petals 4, spread- 



