Isoetes howellii
Encyclopedia
Isoetes howellii is a species of quillwort, a type of lycopod
. Its common name is Howell's quillwort. This is a "primitive" aquatic plant
native to western North America which grows in wet habitat such as vernal pool
s. It produces pointed, cylindrical, bright green leaves approaching 30 centimeters in maximum length. It reproduces via spherical sporangia
.
Lycopodiophyta
The Division Lycopodiophyta is a tracheophyte subdivision of the Kingdom Plantae. It is the oldest extant vascular plant division at around 410 million years old, and includes some of the most "primitive" extant species...
. Its common name is Howell's quillwort. This is a "primitive" aquatic plant
Aquatic plant
Aquatic plants are plants that have adapted to living in aquatic environments. They are also referred to as hydrophytes or aquatic macrophytes. These plants require special adaptations for living submerged in water, or at the water's surface. Aquatic plants can only grow in water or in soil that is...
native to western North America which grows in wet habitat such as vernal pool
Vernal pool
Vernal pools, also called vernal ponds or ephemeral pools, are temporary pools of water. They are usually devoid of fish, and thus allow the safe development of natal amphibian and insect species...
s. It produces pointed, cylindrical, bright green leaves approaching 30 centimeters in maximum length. It reproduces via spherical sporangia
Sporangium
A sporangium is an enclosure in which spores are formed. It can be composed of a single cell or can be multicellular. All plants, fungi, and many other lineages form sporangia at some point in their life cycle...
.