meso-middle; intermediate Designating an achiral member of a group of diastereoisomers that has at least one chiral member meso-tartaric acid; Derived terms
Many animals within the park rely on specific types of plants as their sole food source. Monarch butterflies, for example, only lay their eggs on milkweed, and only eat milkweed while in their caterpillar phase. Milkweed requires a moderately acidic soil to grow, surviving in soil pH levels from 4.8 to 6.8.As with most other plants, it cannot tolerate pH levels below 4. Overly-acidic soil prevents roots from being able to absorb water and nutrients crucial for survival.ilkweed requires a moderately acidic soil to grow, surviving in soil pH levels from 4.8 to 6.8. As with most other plants, it cannot tolerate pH levels below 4. Overly-acidic soil prevents roots from being able to absorb water and nutrients crucial for survival.
Milkweed species with whorled, narrow leaves are typically more toxic than species with broad leaves. Labriform milkweed (Asclepias labriformis), the most toxic milkweed, grows naturally in portions of USDA zones 4 to 8.umans can eat milkweed, but its toxicity depends on its species, age, how it is prepared and how much is eaten. Milkweed is the plant choice of monarch butterflies, and milkweed can be planted to attract monarchs.