— 97 — 
fled as Kochii by European experts. Sometimes forms which I would refer 
to Kochii are found in collections labeled hygrophilum , mistakenly so I 
think, but the types of both need to be seen to make certain. 
A. comp actum is about the size of serpens, light green, yellowish within 
the dense tufts which may be 25 mm. deep but are usually thinner. Leaves 
erect open, about 1 mm. long, narrowly decurrent, lanceolate to ovate lance- 
olate, gradually long acuminate, finely denticulate throughout, teeth at base 
frequently recurved; “ teeth formed of a single or a double papilla over the 
transverse wall or by the protrusion of the adjoining corners of the marginal 
cells.” Costa percurrent or nearly so, broad but thin and sometimes almost 
discontinuous, frequently bearing delicate brood filaments from the back or 
apex; branch leaves narrower and smaller. Seta short; capsule small, erect 
or slightly inclined, nearly or quite symmetric. Mr. Dixon thinks A. dissiti- 
folium Lindb., A . subcompactum Kind, and Brachythecium densum Milde 
are synonyms of this species. 
Amblystegium Holzingeri sp. nov. Plants growing in rather thick 
wide mats, light olive green, closely allied to Amblystegium compactnm but 
about twice as large, lighter colored and lacking the dense cespitose habit 
typical of that species; stems 2-3 cm. long, irregularly to supinnately 
branching, bearing numerous multiform paraphyllia; stem-leaves spreading 
to subsquarrose when dry; ovate- lanceolate and gradually long-acuminate, 
about 1 Xo. 3-0.4 mm., somewhat narrowed to the insertion, strongly and 
longly decurrent, concave, with basal margins more or less reflexed, serru- 
late all around, costa percurrent or vanishing in the apex, stronger than in 
Amblystegium compactum\ median leaf cells linear-vermicular, becoming 
shorter and broader toward the base, cells of basal angles subrectangular to 
quadrate; branch leaves smaller; minutely scabrous protonema frequent on 
costa of stem leaves, slender brood Aliments not rare. Collected at Trem- 
pealean Ridge, Wisconsin, June 20, 1904, by Prof. J. M. Holzinger. Type 
in Herb. A. J. G. ; cotypes will be distributed as No. 335 of North American 
Musci Pleurocarpi. 
The type locality is about ten miles south of Winona, on the Mississippi 
River. Prof. Holzinger says this locality has produced many rare things. 
This species is closely related to Amblystegium compactum and often 
has the peculiar teeth at base of leaves characteristic of that species, but its 
larger size, lighter color, and numerous paraphyllia, combined with several 
minor characters, sufficiently distinguish it. 
The type collection is sterile and might easily be referred to Brachythe- 
cium. The brood bodies are not like any figured by Correns but I have seen 
similar ones on Amblystegium compactum. 
The second subgenus, Hygroamblystegium Loesk. (Published as 
a genus,) contains A. varium (Hedw.) Lindb., A. fiuviatile (Sw.) B. &S., 
A. irriguum (Wils.) B. &S., A. orthocladonifi . B.) Kindb.,M. noterophilum 
(Sulliv.) Warnst. and A. filicinum (L.) De Not. (Treated on p. 3x5 of Mosses 
with Hand-Lens and Microscope as a Cratoneuron. ) With the exception 
of varium and filicinum this subgenus is aquatic when growing normally. 
