Supplement.] 296 



Leucobryum minus Hampe MSS. Sulliv. Mosses Un. St. 24 (1856). Lesq. James 

 Mosses N. Amer. 91 (18S4). 



Leucobryum vulgare ji, minus Hampe in Linnaa xiii, 42 (1839). C. Muell. Synops. i, 75 

 (1849). 



Leucobryum glaucum ji, minus C. Muell. Limuea 1844, p. 687. 



Leucobryum albidum Lindb. in Oefv. Vet. ak. foerh. 1863. 



Dioicous ; in dense whitish tufts, f in. high. Leaves very dense, 

 thin, narrow, more acuminate, erect. Caps, obliquely inclined, nearly 

 regular, not strumose. 



Hab. — On sandy hillocks under beech trees in the New Forest, at Boldre 

 Bridge and Holmsley Station, Lyndhurst. {Piffard, April, 1882) ! ! 



This moss was distinguished as a species by Dillenius, and seems entitled 

 to rank as such by its more delicate texture, and different capsule. Hitherto 

 it has been regarded as exclusively American, and I have seen no other 

 record of its occurrence in Europe. 



DICRANACE^. 



Subf.2. TREMATODONTE.^. Plants small, caespitose ; leaves lane- 

 subulate, without enlarged basal angular cells. Caps, with a long swollen 

 neck, longer than the capsule ; per. of 16 lanceolate teeth, perforated in the 

 middle or cleft ; sometimes cleistocarpous. 



TREMATODON Michx. 



Rich. F1. bor.-Amer. ii, 289 (1803). 



Plants short, caespitant. Leaves lanc.-subulate, nerved, the cells 

 hexagono-rectangular, perich. bracts distinct. Calyptra inflato-cucul- 

 late, rostrate ; caps, on a tall seta, elliptic or oblong, subcernuous, 

 defluent into a long swollen neck, once or twice as long as caps., which 

 is oblong and gently curved, per. of 16 lanceolate teeth, subentire, 

 perforated or cleft into two unequal legs. — Der. rpTj/ia a foramen, oSovs 

 a tooth, 



I. TREMATODON AMBIGUUS {Hedw.) Homsch. 



Autoicous ; in small dense tufts. Leaves from an ovate-oblong 

 base, suddenly lanc.-subulate, nerve excurrent. Caps, subclavate, 

 subcernuous, the neck of equal length, teeth perforated vertically or cleft 

 into two unequal legs. (T. XLV, C.) 



Syn. — Dicranum ambiguum Hedw. Muse, frond, iii, 87, t. 36 (1792), Sp. muse. 150 (1801). 

 Brid. Muse. rec. H, P. I, 180 (1798), Sp. muse. I, 222 (1806). Swartz Muse. suec. 36 

 (1799). Roth Fl. germ, iii, P. I, i6g (1800). P. Beauv. Prodr. 53 (1805). Web. Mohr 

 Bot. Taseh. 195 (1807). Sturm Deutsch. fl. II, 8. Schwaeg. Suppl. I, P. I, 194 

 1811). Robhl. Deutseh. fl. iii, 75 (1813). Mart. Fl. cr. erl. 106 (1817). 



