POLYTRICHACE^.] 38 [Cathariwa. 



for the much later name of P. Beauvois, and then absurdly confers Ehrhart's 

 name on Pol. dendroides BRID. and squamosum HOOK. WILS. both unknown to 

 Ehrhart. 



The genus includes some 25 species, the majority of which are natives 

 of South America, and closely approximate in habit. One other species 

 (C. tenella ROHL.) is European, and has been several times recorded as 

 British, but I have not seen any genuine native specimens. 



C. undulata, although so common, is a most elegant moss, and is certain 

 to be among those that first attract the notice of a young collector. 



CLAVIS TO THE SPECIES. 



Leaves Ungulate, undulated. 



Dioicous. Leaves with obtuse points, densely areolate, margin serrate only in upper half. 



C. angustata. 

 Paroicous. Leaves with acute points, more laxly areolate, margin serrate throughout. 



C. undulata. 

 Leaves oblongo-lanceolate, not undulated. 



C. crispa. 



i. CATHARINEA ANGUSTATA Bnd. 



Dioicous. Leaves shorter, narrowly lanceolate, obtusely pointed, 

 more minutely areolate, serrate only above the middle ; lamellae higher 

 and more numerous. Capsule erect, slender cylindric ; lid with a 

 shorter beak. (T. V, A.) 



SYN. Bryum Juniperi foliis rugosis, capsulis rcctioribus DILL. Hist. muse. 362, n. 19, t. 46, 

 fig. 19 (1741), et Herb. 



Polytrichum nndulatum var. minus MICHX. Fl. bor.-amer. ii, 295 (1803). BALS. DE NOT. 



Prodr. bryol. mediol. 25 (1834). 



Atrichum controversum P. BEAUV. Prodr. 42, excl. syn. (1805). 

 Pol. angustatum BRID. Sp. muse, i, 79 (1806). SCHWAEGR. Suppl. i, P. II, 331 (1816). 



HOOK. muse. exot. i, t. 50 (1818). SCHULTZ Suppl. Fl. Starg. 88 (1819). WALLR. Fl. 



cr. germ, i, 195 (1831). DE NOT. Syll. muse. 215 (1838). 



Pol. cylindricum SVVARTZ in MUEHL. Catal. pi. amer. sept. 99 (1813), et Adnot. hot. 



171 (1829). 

 Catharinca angustata BRID. Mant. muse. 204 (1819) ; Bry. univ. ii, 105 (1827). STEUD. 



Nom. crypt. 101 (1824). HUEBEN. Muse. germ. 519 (1833). C. MUELL. Syn. muse, i, 



193 (1849). HARTM. Skand. Fl. LINDB. in Not. ur Siillsk. Fn. et Fl. fenn. ix, 145 



(1867). DE NOT. Epil. Briol. Ital. 344 (1869). 



Pol. (Oligotrichum) angustatum W.-ARN. in Mem. Soc. d'Hist. nat. Paris, ii, 320 (1825). 

 Atrichum angustatum BR. SCHIMP. Bryol. eur. iv, mon. 9, t. 3 (1844) ; Syn. muse. eur. 434 



1860 , et 2 ed. 528 (1876). MILDE Bry. siles. 246 (1869). BERK. Hand. Br. m. 213 

 OBK. Syn. Br. m. 100 (1873). HUSNOT Mouss. du Nord-Ouest 134 (1873). 



Dioicous ; gregarious or laxly tufted ; resembling C. undulata in 

 habit, but smaller and more slender, and of a more obscure or reddish 

 tint. Stems about i in. high, simple erect. Leaves crowded, linear- 

 lanceolate, shorter and firmer than in C. undulata, less undulated, 

 erecto-patent, more crisp when dry, less spinulose at back, more 

 densely and minutely areolate ; the apex somewhat obtuse, the margin 

 reflexed below, very narrowly bordered, and serrate only in the upper 



