2 REVUE BRYOLOGIQUE 



I 



the Exormolheca came to light. The curious structure of the 

 frond of this remarkable plant with its lax hummocky hyaline 

 upper tissue appears to be one of the most successful xerophytic 

 adaptations exhibited by European hepatics. After a shower a 

 considerable quantity of this plant might be seen on a hot dry 

 slope, which had been searched in vain previously and I have 

 found by experiment that the power of rapid regeneration of the 

 whole frond in retained by the dried material for a long time. 



The abundance of species of Riccia was also very striking. No 

 less than 9 species have been identified. Certainly one more wag 

 seen, of which the material was inadequate and probably others 

 would have been found earhcr in the year. Several of those found 

 were very much over and their characteristics were not recogni- 

 zed until the encysted or otherwise resting material had been 

 brought home and cultivated. The southern species of Riccia are 

 easy of cultivation, but in order to secure characteristic growths 

 and especially a proper development of the violet colouring and 

 cilia, w^hen normally present, they should be given as much hght 

 and exposure as is consistent with keeping the soil moderately 

 moist and they should be watered with rain or other soft water 

 only. My own cultivations of Riccia and other frondose hepatics 



1 



have succeeded admirably under the above conditions, thougl 

 some of the otherwise healthy cultivations were horribly rava<^ed, 

 and in one case entirely destroyed, by the larvce of a species of 

 Camplocladius, a minute dipterous fly which lives in the soil and 

 devours the rhizoids of hepatics. Injection of Carbon bisulpliido 

 into the soil appears to be the most elTicacions remedy, but it is 

 difficult of appUcation, as the chemical will destroy the hepatics 

 if it touches them. Outside Algarve a few records were made near 

 Gintia and Coimbra and in the woods at Bussaco. The latter 

 locality seemed promising, but it was only imperfectly examined. 

 I am much indebted to D'^ Schiffncr for assistance, specially 

 in reference to some critical species of Riccia, to D^' M. A. Howe 

 for notes in reference to Anthoceros and to D^ P. Culmann 

 M'" S. M. Macvicar and Prof.Doula for further help in compihng 

 the following list. 



Riccia Gougeliana Mont. — Moist ground generally near 

 springs or close to little streams, rather common near Caldas, 

 c. fr. — Var. armalissima Levier, with the type. — The short mar- 

 ginal ciha vary considerably with the age and development of 

 the frond. 



R, inlumescens (Bisch.) Heeg. — Slopes of Picota on the east 

 side, sparingly, c. fr. 



