85 : 
Type locality, European (France)! 
Rem. Probably an involute form of the preceding, from which 
it differs by its pointed leaves, indistinct annulus, looser perichetial 
bracts, which are usually destitute of cilia, and more uniform leaf 
cells. 
6. THUIDIUM DELICATULUM (L.) Mitt. 
flypnum delicatulum L. Sp. Pl. 1125. 1753. 
fTypnum delicatulum Hedw. Musc. frond. 4:95. 1791. 
Thuidium delicatulum Mitt. Journ. Linn. Soc. 12: 578. 1869. 
Plants large, in intricate spreading mats, yellow-green ; stems 
5 to 10 cm. long. creeping-ascending, pinnately branched; 
branches pinnate or dzpinnate ; paraphyllia numerous, multiform ; 
stem leaves appressed when dry, erect-spreading when moist, tri- 
angular-cordate, rather gradually acuminate, costa vanishing in the 
acumen, the papillate-serrate margins recurved ; leaf-cells,unipapil- 
late or bipapillate, oblong-quadrate to elliptical-rhomboidal ; branch- 
leaves ovate or ovate-acuminate. Dioicous; perichetial bracts 
rather loose, inner more or less ciate, the loricate-filiform serrate 
acumen about twice as long as the blade; capsule cylindrical, 
strongly curved, horizontal ; annulus compound, tardily deciduous ; 
operculum conic-rostrate, beak curved; cilia 3 to 4; spores rough, 
-014 to .018 mm, maturing in winter. : 
On the ground, rotten wood, stones and rocks in shady places. 
From Labrador (Waghorne) to British Columbia (Macoun) 
southward through the United States ; rare or absent in the Pacific 
States. Also in the West Indies and Central and South America. 
Type localities, « Pennsylvania, Maryland and Virginia.” 
Intusr. Dill. Hist. Musc. 546. pl. 83. fig. 6. 1741. Hedw. 
Muse. frond. 4: p/. 33. 1791. Lindberg,|. c. pl. 1. fig. 8. 1874. 
Husnot, Muse. Gall. p/. 89. 1894. 
: Exsic. Drumm. Muse. Bor. Am. no. 213; 2d ed. no. 136. 
Sull. Musc. All. no. 3. as 1. tamariscinum Hedw. S. & L. Musc. 
Bor. Am. ed. 1, no. 272; ed. 2, no. 403. Aust. Musc. App. 302. 
Macoun, Can. Muse. no. 272. 
Rem. This and the preceding species often grow together. 
In American herbaria they are confused. 7+. delicatulum is fre- 
quently named Zh. recognitum and vice versa. The names Hypnum 
tamariscinum and Hypnum proliferum have been used indiscrimi- fo 
nately for either. 
