Schuster ex Grolle
Plants bilaterally symmetrical, green (no secondary pigmentation), branching profusely, rhizomatous and flagelliform branch systems lacking; vegetative branches lateral-intercalary. Stems lacking internal differentiation; rhizoids numerous, scattered along the lower surface of stem. Leaves succubously inserted, as long as wide, bilobed about 1/3, lobes more or less equal in size; oil-bodies present in all leaf cells. Underleaves absent or minute and awl-shaped. Asexual reproduction by fragmentation. Plants monoicous; male branches lateral each bract containing a single large antheridium ; stalk uniseriate Gynoecia terminal; bracts not or barely differentiated from leaves; bracteole absent. Perianths present. Sporophyte seta long, differentiated internally, 8 cells in outer row, surrounding 4 inner cells, seta not articulate, capsule spherical, valves straight. Elaters with 1 spiral, spores minutely reticulate; germination type unknown.
Genera 1, species 2 (1 genus, 1 species in the flora): North America (Florida); South America.
xxx. CHONECOLEA R. Grolle in Revue Bryologique and Lichènologique 25: 294. 1965 • Greek chonos, funnel, and coleus, sheath, in reference to the shape of the perianth
Clasmatocolea F. Steph. 1906
1. Chonecolea doellingeri (Nees) Grolle, Revue Bryol. et Lichènologique n. 25: 295, 1956.
Jungermannia doellingeri Nees in G. L. & N. 1884
Plants minute, in dense patches. Shoots 0.4--0.8 mm wide. Leaves contiguous to barely imbricate, about as wide as long, lobes broadly triangular; margins entire to crenate; leaf cells thin-walled, lacking trigones and intermediate thickenings; oil-bodies 20--30 per cell in mid-leaf, colorless, single. Underleaves best developed near apex of stem, often absent. Androecia with male bracts unequally bilobed, somewhat conduplicate, concave at base and loosely imbricate, occurring in 2-6 pairs. Perianths exserted, bell-shaped, smooth, with 4-5 obtuse, rounded keels near an open truncate apex.
Shaded trunks of palm trees in low moist forests, often occurring with the moss Octoblepharum albidum along Atlantic and Gulf Coastal Plains of Florida, 0--20 m; South America.
When sterile and without oil-bodies, Chonecolea is practically inseparable from Cylindrocolea rhizantha. Mature fertile plants of each species can be separated on the basis of the spore markings. The spores of Chonecolea are reticulate while those of Cylindrocolea rhizantha are smooth. Fresh sterile plants of Chonecolea have 20-30 minute oil bodies per midleaf cell, whereas Cylindrocolea rhizantha has 4-8 round, finely papillose oil bodies per midleaf cells.
SELECTED REFERENCES Schuster, R. M. 1980. Chonecolea. In R. M. Schuster. 1966-1993. Hepaticae and Anthocerotae of North America East of the Hundredth Meridian. New York. Vol. 4, pp. 321-325.