188 American Midland Naturalist Monograph No. 6 



2. Neckera complanata [Linnaeus] Huebener 



(Hypnum complanatum Linnaeus; Homalia complanata DeNotaris) 



Yellowish to pale green, in rather large and dense tufts, soft: stems long, 

 often reaching 8 or 10 cm, branchlets pinnately arranged; complanate, some- 

 times more or less flagelliform; leaves oblong-lingulate, compressed, complanate, 

 usually rounded at the apex and short-apiculate, sometimes acute or acuminate, 

 those at the tips of the branches often more or less deflected and falcate, the 

 margin usually inflexed at base on one side, serrulate at apex; costa double, 

 very short and faint, or none; median leaf-cells linear-vermicular, the apical 

 shorter and wider, rhomboidal, the angular quadrate-oval and yellowish-pel- 

 lucid; perichaetia borne along the sides of the stem, the leaves long-sheathing: 

 seta yellow, about 1 cm long; capsule oval to elliptic-oblong, pale, orange- 

 yellow or castaneous, about 2:1, small-mouthed; lid subulate-rostrate, usually 

 oblique; calyptra cucullate, reaching to about the middle of the urn, one-half 

 length of urn; peristome-teeth long, pale, narrow, the segments about half as 

 long, filiform from an enlarged base; spores mature in spring but capsules 

 rarely produced. 



On bark of trees, rarely on rocks; Europe, Asia, northern Africa, and from 

 Labrador to Tennessee. 



Rare in our region. Reported from "Allegheny Mountains in Pennsylvania" in 

 Lesquereax and James' Manual. 



3. Neckera gracilis (James) Kindberg 

 {Homalia gracilis James) 



Minute, slender, irregularly branched plants with stems and branches 

 mostly flagelliform at the ends, complanately foliate, and together with the 

 leaves not much more than 1 mm wide; leaves oblong-lingulate, about 0.1 mm 

 long, not undulate, rounded-obtuse or apiculate, somewhat serrulate at the 

 apex; costa very short, often double; upper leaf-cells rhomboidal, about 8-12 jx 

 wide and but little longer, the basal longer in the median and smaller in the 

 marginal portion. 



"On locks, usually in elevated regions, New Jersey, New York and 

 Vermont. "^ — Grout. 



2. Homalia (Bridel) Bryologia Europaea 



Dioicous or autoicous: slender to robust, in wide, more or less lustrous, 

 dark colored, matted tufts: primary stems with stolons; secondary stems mostly 

 irregularly dichotomous, non-flagellate; leaves 4-seriate, complanately spread- 

 ing, not transversely undulate, unsymmetric, spatulate to Ungulate from a 

 slightly decurrent base, rarely rounded, obtuse, non-bordered, with apex entire 

 or serrulate; costa simple, incomplete or none; upper leaf-cells rounded to 

 hexagonal, lower elongate, at least the median so, rarely all linear; inner 

 perichaetial leaves, short-sheathing, lanceolate, acute; seta long, mostly smooth; 

 capsule mostly erect to cernuous, oblong from a narrowed base, when old 

 sometimes arcuate, red-brown, rarely almost pendent and short-oval; annulus 



