110 THR JOURNAL OF BOTANY 



attemiatuiu argute condensate bigeminatim denticulatnm angustata. 

 Yaginula 1 mm. longa, sat magna. Seta circa 8 cm. longa, ei'assius- 

 cula, rubra, inferne lajvis, apice leniter ruguloso. Calyptra immatura 

 4 mm. longa, infiu lajvis, superne setulis brevibus dense hispida. 

 Cetera ignota. 



Hai3. Upper Sarawak, Borneo; A. II. Everett; herb. Mitten 

 (type in herb. N.Y. Bot. (Jard.), mixed with Taxithelinm sp., &.C. 



The affinity of this phint is clearly with Chcetomitnum, some 

 of the species of which have somewhat similar In-ood-Hlaments ; but 

 the dimorphous branches and the bigeminate denticuhition of the leaf- 

 margin seem to justify its separation from that genus. The ex- 

 tremely long, hyaline, jointed Hlaments are very numerous and con- 

 spicuous at the tips of the caudiform branches. 



The dimorphism of the branches is sometimes extremely marked, 

 though at other times the smaller, complanate, laxly foliate ones end 

 in a short penicillate tuft, and in other ways may approach the more 

 rolnist caudate-ti[)ped ones. These, however, are very sti-iking, the 

 curved ])enicillate tips being very conspicuous and characteristic. 



Mitten has sketched roughly a perichietium with what appears to 

 be a S tlower near its base. I have failed, however, to find c^ 

 Howers on the fertile stems I possess. The ])ericluetia also are 

 numerous along the stem, which suggests a dioicous inilorescence. 



ExpLAXATToy OF Plate 56-1. 



1. Nanohryum Dummeri. r/, plant, nat. size. Z>, do., X 4. c, c\ 

 up]:»er leaves, X 20. f/, cells at slioulder, X 200. e, two peristome 

 teeth, X80. /, capsule, moist, X 10. y, do., dry, X 10. 



2. Bechlomlelia fiDuirioiiles. ^/, plants, nat. size. ^, leaf, X 20. 



c, upper marginal cells, x 200. (l,d\ capsules, X 10. e, jjurt of 

 peristome, X HO. /, lower part of a tooth, X 160. g, calyi)tra on 

 immature capsule, X 20. 



3. FhyscoinitreUopsis africana. a, plant, nat. size. h, leaf, 

 X 20. c, upper marginal cells, X 200. d, young fruit with calyptra, 

 X 1-3. e, stoma, X 200. /, capsule, X o. 



4. Chamcthryum pottioides. a, sterile plant, X 2. «', fruiting 

 do., X 2. h, upper leaf, X 20. c, fruit, X 4. 



5. Dimorplioctadon homense. a, plant, nat. size. 5, h' , leaves 

 of normal branches, X 20. c, leaf of caudiform branch, x 20. 



d, marginal cells at mid-leaf, X 200. <?, calypti-a, X 8. /, upper part 

 of inner perichietial leaves, X 20. 



6. Chionoloma induratiim. a, stem, nat. size (u])i)er part dry). 

 h, leaf, X o. c, leaf -apex, X 20. d, margin at mid-leaf, X 200. 



