450 HEPATIC^E. 



1. Aneura palmata [Hedic), Bum. 



Jungerynania palmata, Hedw. Theor. gen., 1 ed. p. 87 (1784). 



Aneura palmata, Dum. Comm. Bot. p. 115 (1822). 



Riccardia palmata, Carruth. in Seem. Journ. Bot. 3, p. 302, pp. (1805). 



Dioicous, csespitose, small, reddish-brown in colour. Fronds 

 ascending, short, dividing into narrow linear segments, palmatitid, 

 apex subacute, obtuse or emarginate, cross-section bi-convex, 6 to 

 8 cells thick near the middle, outer layer of cells much smaller, 

 dark, inner hyaline ; texture opaque, cells of the antical surface 

 roundish, thick-walled. Female flowers lateral ; bracts numerous, 

 minute, lacerate-fimbriate, hyaline. Calyptra clavate, cylindrical, 

 tuberculate. Capsule oblong ; valves acute at the apex, strongly 

 reflexed at the margin when dry, inner layer with about 20 fine 

 rows of semi-annular threads. Spores very small, equal in 

 diameter to the thick part of elater, pale brown, smooth. Elaters 

 unispiral, dark reddish-brown, attenuate at each end. Male plant 

 with narrower stems and branches. Androecia lateral, simple or 

 binate, linear, canaliculate, margin incurved ; antheridia oval, G 

 to 8 imbedded in the frond in two irregular rows. 



Fruits Spring or early Summer. 



Dimensions. — Plants about J inch long, stem and branches 

 '4 to '5 mm. wide, '2 mm. thick; perichsetial bracts '25 mm. 

 long ; calyptra 175 mm. x "6 mm. ; valves '75 mm. x '2 mm. ; 

 spores '015 mm. ; elaters '25 mm. x "015 mm ; androecia 75 mm. 

 X '3, cross-section of same "225 mm. high x '3 mm. wide ; 

 antheridia '75 mm. x '125 mm. 



Hab. — On rotting trees. Somewhat rare. 



7. Tyn-y-Groes, Merionethshire, IF. H. P. 9. Marple, 

 Cheshire, G. A. Holt; Park Bridge, Lancashire, B. Roberts. 

 10, 12. Mardale, Westmorland, George Stabler. 13. (rarroch 

 Wood, New Galloway, ./. Me Andrew. 16. Glen Finnan, Dr. 

 Carrinfjtoh ; Moidart, West Inverness, S. M. Macvicar. 



I. Killarney, Br. CarringtoH, Dr. D. Moore; McArdle & Lett; 

 Oromaglown, Stewart Sj' Holt. 



