64 GERANIACEiE. (GERANIUM FAMILY.) 



Synopsis. 



1. Til I BULL'S. Carpels 5, transversely few -col led, few-seeded. Herbs. 



2. KALLSTKOMIA. Carpels 10. 1 celled, 1 seeded Herbs. 



3. GUAIACUM. Carpels 2-5, compressed, 1-seeded. Trees. 



1. TRIBULUS, L. 



Sepals 5, imbricated in the bud, deciduous. Stamens 10. Ovary 5-celled, 

 with 3-5 suspended ovules in each cell. Carpels of the fruit 5, spiny on the 

 back, transversely divided into 2 - 5 one-seeded cells, separating at maturity, with- 

 out a central axis. Albumen none. — Prostrate herbs. Leaves abruptly pinnate. 

 Peduncles solitary, 1 -flowered. 



1. T. cistoides, L. Leaves unequal ; leaflets 6-16, linear-oblong, muero- 

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

 Key West. — Stems l°-2° long, hairy Petals 2-3 times as long as the 

 calyx. 



2. KALLSTROMIA, Scop. 



Sepals 5-6, persistent, imbricated in the hud. Stamens 10-12. Ovary 10- 

 12-cellcd, the cells 1-ovuled. Carpels of the fruit 10-12, separating from each 

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

 of Tribulus. 



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

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

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

 — Key West and Savannah. — Stems l°-2° long. 



3. GUAIACUM, Plum. 



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

 2 -5-celled, the cells 8- l()-ovuled. Carpels of the fruit 2-5, compressed, 1- 

 sceded 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 A' wide. Fruit obovate. 



Order 82. GERANIACE^E. (Geranium Family.) 



Herbs or shrubby plants, with tumid joints, alternate or opposite pal- 



mately Iobed stipulate leaves, and hypogynous and decandrous flowers. 



- Sepals 5, imbricated in the bud, persistent. Petals 5, convolute in the 



bud, deciduous. Stamens monadelphous at the base ; the 5 exterior ones 



shorter and often sterile. Ovaries 5, 2-OVuled, and, with the persistent 



