The spurge family contains a large variety of phytotoxins, often with a milky sap or latex. 5,735 Found mostly in the tropics, distinctive leaves typically with strong longitudinal veins and tertiary veins at right angles to the midrib.
Most marathon training plans range from 12 to 20 weeks. Beginning marathoners should aim to build their weekly mileage up to 50 miles over the four months leading up to race day. Three-to-five runs per week is sufficient. The vast majority of these runs should be done at a relaxed pace.
1 This 20-week marathon training schedule is geared toward runners who can run 4 miles comfortably and can run 4 to 5 days per week.  This 18-week marathon training schedule is geared toward intermediate runners who have already run a marathon, currently run five days a week, and can run up to 6 miles at a time.