conocephalaceae
Conocephalum
Conocephalum salebrosum Szweyk., Buczk. & Odrzyk - Although not prevalent in any part of the state, this liverwort is associated with damp to wet sites typically on rocks and similar hard substrates. Most specimens observed in Texas have not been the robust form exhibited in the picture. The upper surface of the thallus appears as a regularly incised network of diamond-shaped pattern with a single surface pore in the center of each diamond.
dumortieraceae
Dumortiera
Dumortiera hirsuta subsp. nepalensis (Taylor) R.M. Schust. - A new species for Texas, this thalloid liverwort is at this point known from one location in the Big Thicket National Preserve. Often found in very wet sites on soil or rock, the dark green and glossy surface of the thallus does not have a central groove or air pores on its upper surface.
pallaviciniaceae
Pallavicinia
Pallavicinia lyellii (Hook.) Carruth. - This simple thalloid liverwort is usually found in wet, to very wet, boggy sites with a fairly dependable source of moisture, often a companion of Sphagnum. The relatively narrow, thinner thallus, is somewhat shiny as it creeps along the soil or other fairly organic substrate among other bryophytes and herbaceous vascular plants. The thallus has a very distinct, thickened midrib with lateral “wings” of thinner tissue. Not uncommon, but somewhat infrequent, (due to the specific habitat requirements) in forests and woodlands across much of east Texas (especially the Piney Woods).
petalophyllaceae
Petalophyllum
Petalophyllum americanum C.H. Ford & Crand.-Stotl. - This is a very unique liverwort. Seldom encountered, yet not endangered or threatened, this species inhabits bare mineral soils in open to somewhat shaded sites. The ruffled or pleated appearance of the thallus is a diagnostic character and is usually unmistakable in the field.
Photo courtesy J. Erickson
ricciaceae
Riccia
Riccia sp. 1 -
Riccia
Riccia sp. 2