HANDBOOK OF BRITISH HEPATIC/E. 57 



glaucous leaves, and the monoicous inflorescence of 

 that species. The shoots are irregularly pinnate or 

 bipinnate, the branches alternate, and generally 

 short. 



Radula Holtii, Sj>r. 



Stem creeping, sparingly branched. Leaves 

 rounded-oblong, complicate, saccate from a 

 decurrent base, lobule three times smaller, 

 trapeziform, only inflated at the keel. Peri- 

 anth emersed, trumpet-shaped, terete, a little 

 compressed at the mouth. Dioicous. 



Radula Holtii, Spruce J ourn. Bot., July, 1887. 

 p. 209. 



Within the spray of a waterfall. 



Dioicous; reddish or olive green ; stem creeping 

 scarcely h inch, sparingly branched, partly pin- 

 nate, partly dichotomous. Leaves contiguous 

 or separate, complicate saccate from a decurrent 

 base, at an angle of 45 °, abruptly patent, 

 oblique, rounded-oblong, plane or subconcave, 

 repand, long incurrent, basal angle not veiling 

 the stem ; lobule three times shorter, trapezi- 

 form, obtuse or slightly acute, nearly plane, only 

 inflated at the keel ; cells small, equilateral, not 

 thickened at the angles. Flowers terminal, on a 

 unilateral or two opposite innovations. Bracts 

 often unijugate, erect, closely imbricate, bilobed to 

 the middle, larger lobe broadly obovate, lobule 

 half as long, roundish. Perianth emersed, thin, 

 somewhat incurved, trumpet shaped or club shaped, 

 everywhere almost terete, only at the apex a little 



