SOUTH AFRICAN SPECIES OF MICROTHAMNIUM 91 
As neither species LS eee to have been pers published, 
and both seem to be distinct from any of the published South 
African species I give Aorariptions of them ee 
amnium cavifolium (Rehm.) Dixon, sp. nov.— 
Sordide viride, haud nitens. Caulis vagans, irregulariter pinnatus, 
ramis subse ualibus, brevibus, gracilibus, swbcompressis. Folia 
han concavia, late cordato-ovata, acuta vel plusminus it 
sepe flexuose acuminata, toto ambitu denticulata. Areo 
brevissime linearis, parietibus firmis crassiusculis, angulis super or 
unde folia den 
ata. 
collum sat bake ay arcuata, unde theca horizontalis vel sub- 
pendula ; theca turgide ovalis, majuscula, brevicollis, gibbosa, 
eta eurhynchoidea, apadronl rostrato subequilongo. Calyptra 
e@vis 
’ Hab. Inanda, Natal; Rehm. M. Afr. austr. n. 368. In um- 
brosis montis, Inanda; leg. Wood, Rehmann, n. 654. In monte 
Lechlaba supra Houtbush, Transvaal; Rehm. n. 654 b.; n 655 
(forma tenella). In monte Kivatlamba, Transvaal, leg. Maclea 
Rehm. n. 655 b. On stones in bed o am, 2— 3000 ft., Pieter 
Mariteburg, Natal, 1909; leg. 
all agree—‘ ped. perbrevi, flayo; Spach conico- saben 
recto,” &e. 
M. lutescens Mitt. MS. in herb., type ex herb. Mitten, Inanda, 
Natal, leg. Wood, sterile, is certainly this species, and may very 
likely be Rehmann’s n. 654 cited above. 
MicRoTHAMNIUM cyGNicoLLuM (Hampe) C. M. in Hedw. 1899, 
p- 
Syn. Chryso- -hyprum cygnicollum Hampe MS. in herb. 
M. cavifolio affine; differt foliis chlorophyllosis, opacis, parwm 
concavis, multo angustioribus, vairetene a gradatim in 
acumen breviusculum substrictum haud flexuosum attenuatis ; 
folia ramea angustiora, ovaio-lanceolata, cellulis minute indistincte 
scaberulis. Theca minuscula, in pedunculo sub collo aliquando 
oe vel a subsymmetrica, nec gibbosa, operculo brevi- 
Hab. ©. S., Kooksbosch, leg. Breutel; in saxis prope 
Umpumulo, Natal Afric meridionalis, Jan. 3, 1867, leg. Rev. 
Borgen, nos. 
pi in te = ‘Ha ampe. 
seudo-reptans (C. M.) differs from this species in the 
nano, — rh oR ges subarcuate capsule, as well as in other 
the type of foliation M. cygnicollum and M. 
