GRIMMIACE.E.] 95 \Weissia. 



Orthotrichum crispulum BR. SCH. Bry. eur. fasc. 23, p. 23, t. 12. RABENH. Deutsch. kr. 

 fl. 183. C. MUELL Synops. 713. WILS. Bry. brit. 187, t. 45. HOBK. Synops. 85. 



Ulota crispa ft. crispula HAMMAR Mon. 24. 

 Weissia crispula LINDB. Act. soc. sc. fenn. x., 12. 



HAB. Subalpine districts. 



Not unfrequent in the Lake country, N. Yorkshire and S. Scotland. 



Weissia tdophylla in its typical form is best known by the old capsule 

 having a wide trumpet-shaped mouth, and being contracted below it, the 

 var. intermedia however has the capsule scarcely showing any constriction, 

 and yet we occasionally meet with some where this is decidedly evident, so 

 that we cannot look upon it as other than a mere form. We must also agree 

 with Dr. Carrington in regarding W. crisfnila as nothing more than a variety, 

 for although at first sight the small thin pale abbreviated capsule, suddenly 

 contracted at base into a tapering neck, appears to be characteristic, 

 numerous transition forms occur so linked with the typical, that it is not 

 possible to maintain them as distinct. I have to thank Mr. Holt for a long 

 series of specimens from various localities which have confirmed me in this 

 view of the species. 



6. WEISSIA VITTATA (Mitt.) Braithw. 



Autoicous ; cirrato-crispate when dry. Leaves lineal-lanceolate. 

 Calyptra glossy straw-colour, almost naked. Caps, oval-oblong, with a 

 long neck, not contracted below mouth. (T. LIX, C.) 



SYN. Ulota viftata MITT. Journ. Linn. soc. viii, 3 (1864). 



Orthotrichum calvescens WILS. MSS. CARRINGTON Trans. Bot. soc. Edin. viii, 386 (1866). 



HOBK. Syn. Br. m. 95 (1873). 



Ulota calvescens SCHIMP. Bry. eur. Suppl. fasc. 3 4 (1866), Synops. 2 ed. 303 (1876). 

 Weissia vittata BRAITHW. in Journ. Bot. 1873, p. 202. 

 Orthotrichum Paivanum SCHIMP. MSS. 



Autoicous ; in small yellow green cushions. Leaves densely 

 crowded, patent, cirrato-crispate when dry, from an oval base, which 

 has a deep furrow on each side, lineal-lanceolate, basal cells sub- 

 vermicular, quadrate at margin, and with 5 8 rows of very narrow 

 rectangular cells next the margin, forming a band as high as the middle 

 of leaf, apical irregularly rounded-hexagonal, very small, narrower than 

 in W. Bruchii. Perich. bracts rather shorter than comal leaves ; vaginula 

 naked. Calyptra glossy straw-colour, with very few hairs. Caps, on a 

 longer more slender subflexuose pedicel, oval-oblong, with a very long 

 neck gradually attenuated into pedicel, but little altered when dry and 

 empty, less deeply sulcate, not contracted at or below mouth ; teeth 

 larger, bigeminate, partly separated at apex, or perforated between when 



