The genus Anacolia, with 7
species world-wide (Crosby et al. 2000), has sclerodermous stems,
narrow, non-sheathing, appressed leaves, short setae, and capsules that are
rugose to wrinkled when dry. Anacolia often has trailing
pleurocarpous-like plants with apparently lateral setae, but the genus is
acrocarpous. The perichaetia are originally terminal and later become laterally
displaced by subperichaetial innovations.
Griffin and Buck (1989) segregated
the genus Flowersia for those species of Anacolia that have
centrally papillose leaf cells, axillary hairs with elongate terminal cells,
and curved setae. This treatment is not followed here in part because seta
stance is a variable feature in both genera, and papillae position with
the Bartramiaceae is extremely variable, e.g., the same papillae
variation is present in Philonotis. The terminal cell character of the
axillary hairs is a distinctive feature that clearly separates the two taxa.
The importance of this feature at the generic level is questionable since some
species in Bartramia (Bartramia stricta), Leiomela (Leiomela
deciduifolia), and Breutelia (Breutelia affinis), genera that
commonly have axillary hairs with elongate terminal cells, have axillary hairs
with globose terminal cells.
Anacolia may not be
generically distinct from Bartramia. In general, Bartramia
differs from Anacolia in having multistratose leaf limbs, sheathing leaf
bases, a well-developed stem hyalodermis, and furrowed capsules. There are,
however, species of Bartramia with leaves undifferentiated at base, leaf
limbs bistratose only at the margins, or that lack a stem hyalodermis. The
value of rugose vs. furrowed capsules as an indicator of generic importance in
the Bartramiaceae is questionable since both furrowed and rugose capsules can
be found in species of Philonotis and Breutelia.