122 EUPHOKBIACEAE 



in<i, 6^-24' long : leaflets about eight, oblong-elliptical : fruit strongly 



beaked. — Sparingly adventized along railroad at Courtney ; also in 



Kansas City, Kansas. 



Family 68. RUTACEAE Juss. 



Shrubs with compound punctate-dotted leaves, and polygamo-dioecious 

 regular flowers. Sepals 4-5 or none. Petals 4-5. Stamens 4-5. Pistils 

 2-5, inserted on an elongated receptacle. Fruit a capsule. 



1. XANTHOXYLUM L. 



Prickly shrubs with odd-pinnate leaves. Flowers small, greenish. 

 Pods fleshy, 1-2-seeded. 



1. X. Americanum Mill. Prickly Ash. 5°-15° high : leaflets 5- 

 11, obscurely crenate, ovate : flowers in axillary cymes : calyx absent : 

 fruit black. — Common in woods. April-May. 



Family 69. SIMARUBACEAE DC. 

 Like the last family but leaves not punctate. 



1. AILANTHUS Desf. 



Trees with odd pinnate leaves and polygamous greenish flowers in 

 compound panicles. Stamens 8-10, in staminate flowers. Pistillate 

 flowers with a 2-5-cleft ovary and a few stamens. Fruit a 1-seeded 

 samara. 



1. A. glandulosus Desf. Tree of Heaven. Leaflets many, ovate- 

 lanceolate, oblique at base : samaras 2^ long. — Beginning to escape near 

 Independence. May-June. 



Family 70. POLYGALACEAE Reichenb. 

 Herbs with perfect irregular flowers. Sepals five, the two lateral large, 

 the other three small. Petals three, united into a tube. Stamens about 

 eight, monadelphous or diadelphous. Ovary 2-celled, 2-ovuled. Seeds 



caruncled. 



1. POLYGALA L. Milkwort. 



Stamens and petals more or less cohering. 

 Leaves verticillate. 1- P- verticiUata. 



Leaves alternate. 2. P. incaniata. 



1. P. verticiUata L. Glabrous, branching annual, 4^-10^ high : leaves 

 linear, verticillate in fours and fives : flowers greenish-white. — Rocky 

 woods throughout, but not common. June-July. 



2. P. incarnata L. Glabrous, slender annual, l°-2° high : leaves 

 small, linear-subulate : flowers pinkish : corolla tube very slender. — Dry 

 prairies between Lee's Summit and Greenwood. Very rare. June. 



Family 71. EUPHORBIACEAE J. St. Hill. 

 Herbs with monoecious or dioecious (lowers. Sepals and petals present 

 or wanting and flowers sometimes enclosed in a calyx-like involucre. 



