— 93 — 
er's name applies to the plant later described as Tortula perflaccida Broth. The 
two species are, indeed, so similar in gross appearance that on the original sheet 
of Bertero’s material, ticketed in Schimper’s hand, there is a tuft of each species 
preserved, side by side. 
The clearing up of the identity of these two species involves a few nomen- 
clatorial changes, and as the original publication may not be readily accessible, 
we summarize these conclusions below: 
(1) Barbula depressa Sull. Musci Wilkes Exped. p. 5, pi. 11 B (1859). 
B. flagellaris Schimp. pp. in sched. in Hb. Mus. Paris; Mitten, (sub Tortula ), 
Musci austro-am. p. 150; Brotherus, in Engler & Prantl. Nat. Pflanzenf. 
Musci. p. 410; Dusen, in Arkiv for Bot. bd. 6, Nr. 8, p. 14; Cardot. FI. bry. 
terr. magell. p. 94. 
Under the species are three varieties, viz.: var. denticulata (Dus.) 
Ther.; var. gracilis (Dus.) Ther. ; and var. oliviensis (Card.) Ther. The 
latter is the Barbula oliviensis Card., while the two others had been de- 
scribed by Dusen under B. flagellaris auct. 
(2) Tortula flagellaris (Schimp.) Ther. 
Barbula flagellaris Schimp. Ann. sc. nat. nth Ser. T. vi. p. 146 (1836); 
C. Miill. Syn. Muse. I, p. 642. 
Tortula perflaccida Broth, in Dusen 1 . c. 
Under this species M. Theriot describes as a new variety, var. densiretis 
Vegetation on Conglomerate Rocks in Cincinnati Region. — Miss 
Braun has described in an interesting paper 5 the succession of vegetation on 
the conglomerate rocks near Cincinnati, Ohio. In places the glacial-outwash 
boulders, gravels, and sands have been cemented by limestone into a massive 
irregular conglomerate, which, being more resistant to erosion than the sur- 
rounding materials, usually stands out as irregular outcrops on hillsides. The 
rock is rather porous and in the pockets of the irregular masses a black, sandy, 
calcareous, spongy, humus soil accumulates. Another interesting point lies 
in the isolation of the outcrops as plant habitats, several miles often intervening 
between similar outcrops. The succession is grouped under four headings: 
1. Lichen stages, (a) Crustose lichens are the first, occurring as patches on 
the smoother and more exposed rock faces. Lecidea sp., Pertusaria communis , 
Staurothele umbrina , Verrucaria muralis , and Placodium citrinum. The xero- 
phytic moss, Grimmia apocarpa, is of minor importance, (b) Dermatocarpon 
miniatum practically covers the surface in the second stage, the gelatinous lichen, 
Omphalaria sp., being the most prominent of the secondary species. Mosses 
are here more important than in the first stage: Grimmia apocarpa , Anomodon 
attenuatus, and Leskea sp. On under sides of ledges and in shaded spots the 
6 Braun, E. Lucy. The Vegetation of Conglomerate Rocks of the Cincinnati Region. Plant 
World 20 : 380-392. December, 1917. 
