G4 GERANIACEJE. (GERANIUM FAMILY.) 



Synopsis. 



1. TKlBULrS. Carpels 5, transversely few-celled, few-seeded. Herbs. 



2. KALLSTROMIA. Carpels 10, 1 -celled, 1-seeded. Herbs. 



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



1. TRIBULUS, L. 



Sepals 5, imbricated in the bad, deciduous. Stamens 10. Ovary 5-cclled, 

 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. eistoid.es, L. Leaves unequal ; leaflets 6 -16, linear-oblong, mucro- 

 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 bud. Stamens 10-12. Ovary 10- 

 12-eelled, 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 Tribultts. 



1 . X. 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-eellcd, 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 h, obliquely obovate or oblong, mucronate, entire; 

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

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

 small tree with white bark. Flowers i' wide. Fruit obovate. 



Ordeh 32. GERANIACEJE. (Geranium Family.) 



Herbs or shrubby plants, with tumid joints, alternate or opposite ]>al- 



mately Iobed stipulate bases, and hypogynous and decandrous flowers. 



Sepals 5, imbricated in the bud, persistent. Petals ■">. convolute in the 



1 iid, deciduous. Stamens nionailrl|>hoiis at the base ; the ."> exterior ones 



shorter and often sterile. Ovaries 5, 2-ovuled, and, with the persistenl 



