Planta mascula eisdein femineis simillima; bracteae latae, ova- 

 tae, muticae seu brevissirae piliferae, marginibus planis; antheridia 

 nuraerosa, paraphysibus copiosis paullo clavatis. 



Hub. in arena aridissima desertorum regionis transcaspicae: Tschi- 

 kischljar (^etfr., Apr. 27, 1886, G. Radde), Perevalnaja (ster., 

 Apr. 10, 1886, G. Radde), Germab (c. fr., Maji 6, 1886, G. Radde), 

 Bal-Kuju (c. fr., Febr. 25, 1886, G. Radde), ad viam inter Duschak 

 et Kary-bent (c. fr., 1886, G. Radde), Utsch-adschi (c. fr., Martii 15, 

 1887, A. Walter). 



Pulcbra species e proxima T. montana (Nees.) Lindb. (T. inter- 

 media (Brid.) Wils.) folioruni forma et structura optime distiocta. 



55. Tortula ruralis (L.) Ehrh. — Kopet-dagh pr. Askhabad 

 ut etiam ad D.urun (Radde). Fertilis. 



56. Tortula transcaspica Broth, n. sp. 



Autoica, caespitosa, caespitibus luteseenti-viridibus; caulis bre- 

 vissimus, vix ultra 2 mm. altus, simplex vel subsimplex; folia dense 

 conferta, erecta, sicca adpressa, paullum carinato-concava, brevia, 0,8 

 mm. longa et 0,7 mm. lata, late oblongo-acuminata, inferiora mutica 

 vel brevipila, superiora longissime pilifera, marginibus haud limbatis, 

 inferne planis, superne revolutis, laevissimis, nervo valido, rufo, in pilum 

 album plus minusve longum, laevissimum producto, rete pellucidum, 

 laevissimum, cellulis magnis, fere quadratis vel breviter rectangularibus, 

 parce chlorophyllosis; bracteae perichaetii minores, longipilae, margi- 

 nibus planis; vaginula brevis, 0,65 mm. alta, conica, fusca, pauca 

 pistillidia et paraphyses gerens; seta 12 mm. alta, inferne sinistrorsum, 

 superne dextrorsum torta, erecta, purpurea, tenuis, sicca flexuosula, 

 laevissima; theca cylindrica, recta, vix asyrametrica, fusco-brunnea, 

 sicca indistincte striata, nitida, 3 mm. alta et 0,5 mm. crassa; annulus 

 duplex, longissime persistens; peristomiiim breve, fere ad quartam 

 partem tubulosum, tubo pallido, 0,15 mm. alto, deutibus subconvolutis, 

 purpureis, densissime papillosis, 0,5 mm. longis; sport 0,02—0,022 

 mm., ferrugiuei, laevissimi; operculum 0,8 — 1 mm. longum, conicuffl, 

 parum obliquum, obtusum, nitidissimuin, laxe textuui, cellulis in spiram 



