Steamboat Slough is an alternate branch of the Sacramento River, named for its popular use by steamboats traveling between San Francisco and Sacramento. Its mouth is found at an elevation of 3 feet (0.9 m), 2 miles (3 km) above Rio Vista, between Grand Island and Ryer Island. Its head is 11 miles (18 km) above where it leaves the Sacramento River, between Sutter Island and Grand Island, at an elevation of 26 feet (8 m) at 38°18′17″N 121°34′25″W / 38.30472°N 121.57361°W.[1]
It is crossed by the Howard Landing Ferry.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction