212 Evans: Notes on genus Herberta 



species would not differ appreciably from those of H. adiinca. 

 Perianths were likewise unknown to Stephani, although he quotes 

 from Kaalaas a brief description of bracts, perianths and capsule. 

 Whether Kaalaas actually saw these structures in H. adunca is, 

 however, doubtful. The description quoted by Stephani was 

 taken (with certain arbitrary changes) from the account of the 

 genus given by Kaalaas,* the account of the species merely stating 

 that the reproductive organs were "ut in genere." According to 

 Macvicar female plants are frequent, but perianths are unknown 

 in the British Isles. He quotes Hooker's statement about Dick- 

 son's fruiting plants but suggests that there was probably some 

 mistake on Dickson's part. If this idea could be substantiated 

 there would be no evidence left that H. adunca had ever been found 

 in fruit. It is to be hoped that further explorations may be 

 rewarded by the discovery of the missing parts, although a per- 

 sistent sterility would not be surprising in the present genus, 

 where other well-marked species apparently produce neither arche- 

 gonia nor antheridia. 



2. Herberta Sendtneri (Nees) comb. nov. 



ScMsma Sendtneri Nees, Naturg. europ. Leberm. 3: 575. 1838. 

 Jungermannia Sauteriana Hiiben, & Genth, Deutschl. Leberm. 



loS. 1839 {nomen nudum); G. L. & N. Syn. Hep. 240. 1845 



(as synonym). 

 Sendtnera Sauteriana Nees; G. L. & N. Syn. Hep. 240. 1845. 

 Schisma stramineum Dumort. Bull. Soc. Bot. Belgique 13: 123. 



1874 (iri part). Not 1831. 

 Herberta straminea Trevis. Mem. R. 1st. Lomb. HI. 4: 396. 



1877 (in part). 



Brownish green, not glossy, growing in more or less extended 

 mats: secondary stems erect or ascending, sparingly and irregu- 

 larly branched, rigid, mostly 5-8 cm. long, about 0.35 mm. (or 

 fifteen cells) wide and 0.3 mm. (or twelve cells) thick, the cells 

 everywhere with strongly thickened walls: leaves imbricated, more 

 or less secund, broadly ovate, mostly 1.2-1.6 mm. long and 

 0.75-1. 1 mm. wide, bifid one half or a little more, the divisions (in 

 explanate leaves), slightly or not at all curved, acute to acuminate, 

 mostly 0.6-0.9 iTirn. long and 0.4-0.55 mm. wide, margin irregu- 



* Nyt Mag. f. Naturv. 33: 223. 1893. 



