9 2 



PATAGONIAN EXPEDITIONS! BOTANY. 



basi 0.06 mm. crasso, percurrente, cum apice evanescente vel paulum ex- 

 cedente ; celhdcz pellucidae, densiusculae, apicales medianaeque rhombeae 

 vel subhexagonae, marginales anguste elongatae, basales ampliores, om- 

 nino rectangulae ; bractece perichcetii foliis caulinis similes, sed paulum 

 majores ; seta erecta, stricta, rigida, fusco-brunnea, subnitida, c. 2 cm. 

 alta ; thcca pendula, brunnea, elongate pyriformis, collo sporangium fere 



FIG. 1 8. 



abed 

 Bryum rigochate Dusen. a, folium, -^ ; b, sectio folii, ^ ; c, cellulse apicales, -*- ; d, cellulae 

 basales, ^-, e, capsula humiditate, ^ ; f, capsula siccitate, -ij 8 -. 



aequante ; denies exostomii lanceolate subulati, aurei, superne scabri, 

 ceterum minutissime granulosi, 0.35 mm. alti et basi 0.08 mm. lati, linea 

 divisurali distincta, lamellis c. 16 praediti ; operculum convexe conicum, 

 breviter apiculato ; sporce laevissimae, 0.027-0.030 mm. magnas ; cetera 

 ignota. 



.Hab. speciei, Patagonia australis, ubi verisimiliter in territorio fontinali 

 fluminis Rio Chico in terra paludosa lecta est. 



Near to Bryinn lamprochczte Dusen, but distinct and easily distin- 

 guished by its more robust stem, less acute and non-cuspidate leaves and 

 much denser lamellated peristomial teeth. Resembling also Bryum ver- 

 nicosum Dusen, but differing from that species by being more robust, 

 simple or with only flagelliform innovations, ramulose stem, larger and 

 less acute leaves with weaker nerve and much broader peristomial teeth. 



BRYUM HATCHERI Dusen n. sp. 



PI. X, Figs, s, 6. 



Dioicum; dense caespitosum, caespitibus humilibus, fuscoviridibus, haud 

 nitidis, caulibus inferne leviter intertextis, catilis c. i cm. altus, erectus vel 



