Study Set Content:
undergo meiosis producing haploid spores
Sporocytes
Mature sporophytes look like miniature, greenish to blackish rods that may curve slightly, have gametophytes that resemble filmy version of thalloid liverworts.
Hornworts
They are usually less than 2 centimeters (0.8 inch) in diameter and thrive mostly on moist earth in shaded areas, although some occur on trees
Hornworts
number of species of hornworts
100 species
usually have only one large chloroplast in each cell (a few species have up to eight). Each chloroplast has pyrenoids similar to those of green algae.
Hornworts
often grow in mucilage
Nitrogen-fixing cyanobacteria
Hornworts reproduce asexually primarily by
Fragmentation
Archegonia and antheridia are produced in rows just beneath the upper surfaces of the gametophytes
Hornworts of sexual reproduction
Like both mosses and liverworts, some species of hornworts have
unisexual plants, whereas other species are bisexua
(stalks)
setae
They have no setae (stalks) and look like tiny, green broom handles or horns rising through a basal sheath from a foot beneath the surface of the thallus.
Hornworts
function similarly to those of liverworts are intermingled with spores.
Diploid elaters
