Donkey
Donkeys can interbreed with other members of the family Equidae, and are commonly interbred with horses. The hybrid between a jack and a mare is a mule, valued as a working and riding animal in many countries. Some large donkey breeds such as the Asino di Martina Franca, the Baudet de Poitou and the Mammoth Jack are raised only for mule production. The hybrid between a stallion and a jenny is a hinny, and is less common. Like other inter-species hybrids, mules and hinnies are usually sterile. Donkeys can also breed with zebras in which the offspring is called a zonkey (among other names).
Equisetum
The genus "Equisetum" as a whole, while concentrated in the non-tropical northern hemisphere, is near-cosmopolitan, being absent only from Antarctica, though they are not known to be native to Australia, New Zealand nor the islands of the Pacific. They are most common in northern North America (Canada and the northernmost United States), where the genus is represented by nine species ("arvense", "fluviatile", "palustre", "pratense", "sylvaticum", "hyemale", "laevigatum", "scirpoides", and "variegatum"). Only four ("bogotense", "giganteum", "myriochaetum", and "ramosissimum") of the fifteen species are known to be native south of the Equator. They are perennial plants, herbaceous and dying back in winter as most temperate species, or evergreen as most tropical species and the temperate species rough horsetail ("E. hyemale"), branched horsetail ("E. ramosissimum"), dwarf horsetail ("E. scirpoides") and variegated horsetail ("E. variegatum"). They typically grow 0.2–1.5 m tall, though the "giant horsetails" are recorded to grow as high as 2.5 m (northern giant horsetail, "E. telmateia"), 5 m (southern giant horsetail, "E. giganteum") or 8 m (Mexican giant horsetail, "E. myriochaetum"), and allegedly even more.