68 RUTACEJE. (RUE FAMILY.) 



without a central axis. Albumeii none. Prostrate herbs. Leaves abruptly 

 piuuate. Peduncles solitary, 1-flowered. 



1. T. cistoid.es, L. Leaves unequal; leaflets 6- 16, linear-oblong, mu- 

 cronate, silky beneath ; peduncles as long as the leaves ; flowers large, yellow. 

 - South .Florida. Stems l-2 long, hairy. Petals 2-3 times as long as 

 the calyx. 



2. KALLSTROMIA, Scop. 



Sepals 5-6, persistent, imbricated iu the bud. Stamens 10-12. O\;irv 

 10- 12-celled, the cells 1-ovuled. Carpels of the fruit 10- 12, separating I'roni 

 each other and from the central axis. Albumen none. Hairy herbs, with 

 the habit of TKIBULUS. 



1. K. maxima, Torr. & Gray. Leaves nearly equal; leaflets 6-8, ob- 

 liquely oblong, mucrouate, the terminal pair larger; peduncles shorter than 

 the leaves ; petals as long as the bristly calyx, yellow ; carpels rugose on the 

 back. Key \Vestaud Savannah. Stems l-2long. 



3. GUAIACUM, Plum. 



Sepals 5, deciduous. Stamens 10, with naked filaments Ovary stalked, 

 2-5-celled, the cells 8-10-ovuled. Carpels of the fruit 2-5, compressed, 1- 

 seeded. Seed-coat fleshy. Embryo straight in hard thin albumen. Trees. 

 Leaflets reticulate. Flowers blue or purple. 



1- G. sanctum, L. Branches opposite and forking, jointed, pubescent 

 when young ; leaflets 6 or 8, obliquely obovate or oblong, mucronate, entire ; 

 peduncles single or clustered at the forks of the branches, 1-flowered, shorter 

 than the leaves; sepals and petals obtuse; flowers blue. South Florida. 

 A small tree with white bark. Flowers \' wide. Fruit obovate. 



ORDER 33. RUTACE^E. (Run FAMILY.) 



Herbs, shrubs, or trees, with exstipulate simple or compound clotted 

 leaves, and regular hypogyuous perfect or unisexual flowers. Sepals 

 and petals 3-5. Stamens as many or twice as many as the sepals. 

 Ovaries 2-5, distinct or united, stipitate or sessile on a glandular disk. 

 Styles mostly united. Fruit commonly composed of separate 1-celled 

 2-valved carpels. Embryo straight or curved, mostly in fleshy 

 albumen. 



1. XATTTHOXYLUM, L. PRICKLY ASH. 



Flowers monoecious or dioecious. Sepals and petals 3-5. Stamens 3-5. 

 Ovaries 2-5, sessile or stipitate, 2-ovnled. Carpels 2-valved, 1-2-seeded. 

 Seed smooth and shining. Trees or shrubs, commonly armed with stipular 

 prickles. Leaves unequally pinnate, the leaflets punctate with pellucid dots. 

 Flowers small, greenish. 



1. X. Clava-HercullS, L. (TOOTHACHE TKEE.) Smooth; branches 

 and commonly the petioles armed with long prickles ; leaves alternate, 7-9- 



