O SYNOPSIS OF THE ORDERS. 



24. Rutaceae (p. 106). Flowers mostly regular, 3-5-merous, dioecions oi 

 polygamous in our genera. Ovary 2 - 5-lobed or the carpels nearly dis- 

 tinct, upon a glandular disk; cells 2-ovuled. Mostly shrubs or trees, 

 with glandular-punctate compound leaves, without stipules. 



* 2. Ovules (1 or 2) pendulous, the rhaphe away from the axis ; disk none 



and ovary not lobed. 



25. Ilicineae (p. 107). Flowers small, dioeciously polygamous, axillary, 4- 



8-merous. Fruit a 4 - 8-seeded berry-like drupe. Shrubs or trees, with 

 simple alternate leaves and no stipules. 



* 3. Ovules (1 or 2 in each cell) erect, the rhaphe toward the axis ; disk fleshy, 



covering the base of the calyx ; stamens as many as the petals, at the 

 margin of the disk ; flowers perfect or polygamo-dioecious ; albumen fleshy; 

 shrubs or trees, with simple leaves (compound in some Vitacese). 



26. Celastraceae (p. 109). Sepals and petals imbricated, the stamens alter- 

 nate with the petals. Fruit 2-5-celled; seeds arilled. 



27. Kliamnaceae (p. 111). Calyx valvate. Petals small or none. Stamens 



alternate wdth the sepals. Fruit 2 - 5-celled ; seeds solitary, not arilled. 



28. Vitaceae (p. 112). Calyx minute. Stamens opposite the valvate cadu 



cons petals. Climbing by tendrils opposite the alternate leaves. 



* 4. Ovules (1 or 2) ascending or horizontal, or pendulous from a basal funicle ; 



fleshy disk entire or lobed; stamens 5-10; shrubs or trees, with com- 

 pound leaves (simple in Acer) and mostly polygamo-dioecious and often 

 irregular flowers; petal-s imbricate (sometimes none in Sapindacege). 



29. Sapindacese (p. 115). Flowers mostly unsymmetrical or irregular. 

 Ovary 2 - 3-celled and -lobed. 



30. Anacardiaceae (p. 118). Flowers regular, 5-androus. Ovary 1-celled, 

 becoming a small dry drupe. Leaves alternate ; juice milky or resinous. 



* 5. Ovules solitary, pendulous from the summit of the 2-celled ovary ; disk 



none; flowers irregular (subpapilionaceous), hypogynous; stamens mon- 

 adelphous or diadelphous ; anthers 1 -celled, opening by an apical pore. 



31. Polygalaceae (p. 120). Herbs, with perfect flowers and alternate or 



opposite or whorled entire leaves. Stamens 6-8. Seed carunculate. 



C CALYCIFLOR^. Sepals rarely distinct; disk adnate to the base of 

 the calyx, rarely tumid or conspicuous ; petals and stamens on the calyx, 

 perigynous or epigynous, the ovary being often inferior (hypogynous in 

 Drosera and Parnassia, nearly so in some Legumiuosae and Crassulaceae). 

 Apetalous flowers in Orders 33, 35, 36, 38, 39, 41, 42, 47, and 50. 



* I. Ovary usually superior, the pistils solitary, or several and distinct (some- 



times more or less united but at least the styles distinct except in some 

 Saxifragaceae). 



32. Leguminosae (p. 122). Flowers papilionaceous or regular. Stamens 



usually 10, and mostly monadelphous or diadelphous. Pistil one, free, 

 becoming a legume; style terminal. Albumen none. Leaves mostly 

 compound, alternate, stipular. 



33. Rosaceae (p. 150). Flowers regular, with usually numerous distinct 



stamens, and 1 -many pistils, distinct or (in Pomeae) united and combined 



